Key Heat Trapping Gas Crosses 410 Parts Per Million Threshold — Highest Level in Past 5-20 Million Years

This past week, atmospheric carbon dioxide levels passed a new ominous milestone.

Clocking in at 410.7 parts per million at the Mauna Loa Observatory, this key heat trapping gas hit a range not seen on Earth for many millions of years.

(The world crossed the 410 part per million milestone in the daily measure this week. Image source: The Keeling Curve.)

These levels now correspond with the Miocene Climate Epoch when seas were 120 to 190 feet higher than today and when global temperatures ranged from 3 to 5 degrees Celsius hotter than preindustrial averages.

Record Rates of Accumulation

These new records come following two years of record rates of atmospheric CO2 accumulation. According to NOAA, carbon dioxide accumulated by 3.03 parts per million during 2015 and by 3.00 parts per million during 2016. These now represent the two fastest rates of carbon dioxide accumulation in the climate record to date. By comparison, the substantial warming at the end of the last ice age was accompanied by an approximate 0.01 part per million per year rate of CO2 increase averaged over 10,000 years.

2017 rates of atmospheric CO2 accumulation, according to NOAA, appear to have backed off somewhat in the first quarter. Comparative gains from Q1 2016 to Q1 2017 are about 2.8 parts per million. A weak La Nina in the Pacific during late 2016 probably helped ocean surfaces to cool and to draw down a bit more CO2. However, the rate of increase is still disturbingly rapid. A 2.8 ppm increase in 2017, should it emerge, would be the 4th highest annual rate of increase in the record and would be substantially above past decadal averages. Hopefully, this still-disturbingly-rapid rate of increase will continue to tail off a bit through the year. But it is increasingly clear that the time for urgent action to reduce carbon emissions and this very harmful related rate of accumulation is now upon us.

(The CO2 growth rate has recently been ramping higher due to record carbon emissions during the present decade. Rates of carbon emission will need to fall away from record high rates in order to tamp down the presently high rate of accumulation which will tend to trend higher even if such emissions remain at plateau due to various faltering carbon sinks and leaking natural carbon stores. Image source: NOAA.)

The total CO2 increase since major fossil fuel burning began in the 19th Century is now in the range of 130 parts per million from 280 (ppm) to today’s high of 410 (ppm). By comparison, during the end of the last ice age, levels of this heat trapping gas jumped by about 100 (ppm) from around 180 (ppm) to 280 (ppm). Atmospheric averages for 2017 should range about 3-4 ppm lower than the April-May high mark (which might still hit daily highs of 411 ppm or more). But at present rates of increase, we’ll be leaving the 410 ppm threshold level in even the lower average months behind in just a handful of years.

Depending on How You Look at it, We’re 5 to 30 Million Years Out of the Holocene Context

The primary driver of the present extreme rate of CO2 increase is global carbon emissions (primarily from fossil fuel burning) in a record range near 11 billion tons per year (or nearly 50 billion tons of CO2 equivalent gas each year). Though 2014 through 2016 saw a plateau in the rate of global carbon emission, the decadal average accumulation of this emission is still at record highs. Meanwhile, it appears that warming oceans, lands more susceptible to deluges and wildfires, increasingly deforested regions like the Amazon, and thawing Arctic permafrost are less able to take in this record excess. As a result of these factors, human fossil fuel emissions will need to fall for a number of years before we are likely to see an impact on the average annual rate of atmospheric accumulation of this potent heat-trapping gas.

(Past paleoclimate proxy records show that we are millions of years out of the Holocene context when it comes to present levels of atmospheric CO2 accumulation. Image source: Skeptical Science.)

Paleoclimate studies of past epochs are unable to provide 100 percent accuracy for past atmospheric CO2 levels. However, proxy data provides a good range of estimates. Based on these measures, it appears that the most recent likely time when atmospheric CO2 levels were comparable to those we now see today occurred around 5 million years ago. Meanwhile, it appears possible that the last time CO2 levels were so high extended as far back as 20 to 25 million years ago.

Unfortunately, carbon dioxide is not the only heat trapping gas humans have emitted into the atmosphere. Add in methane and other greenhouse gasses and you end up with a heat forcing roughly equivalent to 493 parts per million of CO2 (CO2e) during 2017 at present rates of increase. This level is very close to the maximum Miocene boundary level of 500 parts per million — a total amount of heat forcing that likely hasn’t been seen in 20-30 million years.

Serious, Concerted Action Required to Avoid Worsening Disasters

The only safe and reliable way to halt the rapid rise of heat trapping gasses and concurrent warming is to cease emitting carbon to the atmosphere. Such an undertaking would primarily involve a major shift away from fossil fuel burning machines and infrastructure. Present low-cost renewable energy provides a powerful option for just such a transition. In addition, various forms of atmospheric carbon capture from changes to land use, to biofuel-based carbon capture, to materials-based carbon capture will be necessary to draw down the extraordinarily high level of carbon overburden that has already been emitted. Failing such an undertaking, however ambitious, would consign the world to increasingly harmful temperature increases and related damaging geophysical changes for the foreseeable future.


The Keeling Curve


Skeptical Science

Entering the Middle Miocene

Renewable Energy Technology is Now Powerful Enough to Significantly Soften the Climate Crisis

Hat tip to Ryan in New England

Hat tip to Wili

Hat tip to Erik Frederickson

Hauntingly Freakish Siberian Wildfires Now Flicker to Life in April

This past winter has been ridiculously warm for large sections of Siberia. From the Yamal Peninsula to Lake Baikal to the thinning ice of the Arctic Ocean and back down to the Sea of Okhotsk, temperatures have ranged from 4 to nearly 7 degrees Celsius above normal throughout the entire first quarter of 2017.

(4th Consecutive year of extreme Siberian cold season warmth brings with it the heightened risk of early wildfires. Image source: NASA GISS.)

Climate reanalysis shows these far above average temperatures extending well into April. And, as a result, the Arctic chill that typically settles over this often-frozen region has been greatly reduced throughout winter and on into early spring.

2017 marks the 4th consecutive year of excessive winter warmth for this section of our world. A human-emissions-driven rise of abnormal heat that brings with it consistently earlier thaws, disruptive permafrost melt, and the freeing of new, deep-running, peat-like fuels for wildfires. A fuel that can smolder on through winter to again mar the land with new surface fires once the thin covering of snow draws back. An event that is occurring earlier and earlier as the decades and the great outpourings of oil, gas, and coal based carbon into the atmosphere wear on.

(Multiple wildfires and hotspots visible in this Sunday, April 22nd LANCE MODIS satellite shot of Siberia.)

On Saturday, April 22nd, the same day that tens of thousands of people marched to support climate scientists besieged by amoral corporate and political powers linked to the fossil fuel industry, multiple small fires flared along the thawing edge of that greatly warmed Siberia. A number of the more western blazes, intense enough to emit smoke plumes visible in these LANCE-MODIS satellite shots, appeared to have already expanded to over 1,000 acres.

By Sunday, the fires sparking closer to Lake Baikal further east had also grown their own series of tell-tale smoke plumes. One particular blaze in central Siberia appeared to have produced a 2.5 x 6 mile long burn scar in just one day (about 10,000 acres).

(40×60 mile section of Central Siberia on April 23 of 2017 shows large wildfires burning near the thaw line. Image source: LANCE MODIS.)

This year’s early wildfire eruption in Siberia comes after 2014, 2015, and 2016 wildfire outbreaks during similar timeframes and following similarly abnormal warm periods. These fires tended to crop up south of Lake Baikal or closer to the China-Russia border. This year, the early fire outbreak appears to have emerged both further north and generally along a wider expanse than during past years.

If past years are any guide, we can expect the present fire season’s early start to produce blazes that continue through September and that peak sometime during late June through August. The fires will tend to be very large and will probably range as far north as the Arctic Ocean.

(By summer, wildfires in Siberia are now capable of repeatedly producing massive smoke plumes like this 2,500 mile long monstrosity that was visible from 1 million miles away in space during a 2014 event. Image source: LANCE MODIS.)

These fires will gain ignition from new Arctic thunderstorms. They will be fed by new fuels such as thawing permafrost and trees harmed by northward invading species or by climates warming at rates far faster than they can handle.  And they will be capable of casting off gigantic smoke plumes that encircle the higher latitude reaches of the globe.

Instances of this kind are the upshot of new climate change related impacts. We wouldn’t have expected such a vast amount of Arctic and near Arctic burning over a 5 month fire season during the 19th or 20th Centuries. But the new very large cold-region fire outbreaks are happening in a world at around 1.2 C hotter than 1880s averages and warming. And, unfortunately, if we keep warming, we can expect a considerable worsening of these already troubling events.




Siberian Wildfires in April

Tens of Thousands turn out for Science March

Hat tip to Wili

Hat tip to Colorado Bob

Duration of Indian Hot Season Nearly Doubles as Crushing Drought and Heat Expand Across the Subcontinent

“It is a drought we have not seen in 110 years. Extreme weather events are becoming more frequent and it is due to global climate change.” — S. Thirunavukkarasu, a retired Tamil Nadu Public Works official.


For India, the hot-season-like temperatures began in late February — two months earlier than usual. After a brief respite, they fired again in March, bringing April-like temperatures a month too soon. The hot season for this region typically begins in mid-April and extends through mid-June. In 2017, hot-season conditions sparked in late February. Today, life-threatening temperatures of between 100 and 115 F blanket much of this vast, densely populated land.

The early onset of heat comes after years of expanding drought, warming temperatures, melting glaciers and drying rivers, bringing with it a deepening hardship. Farmers across the country report a sense of deepening desperation as cries for help in the form of nationwide protests break out. Meanwhile, those working outdoors increasingly suffer from heat- and dehydration-related kidney failure. This year, conditions that threaten heat injury and loss of life have spurred schools across the country to close early.

(GFS model runs indicate temperatures in excess of 47 C or 115 F over parts of India tomorrow, April 22nd. Meanwhile, forecasters predict that 50 C or 122 F readings are possible in the coming days and weeks. Image source: Earth Nullschool.)

In two southern provinces, Kerala and Tamil Nadu, the situation is one of extreme drought. In Kerala, water stress has now reached an intensity not seen in all of the past 115 years. Tamil Nadu’s own drought crisis is the worst in 110 years. And in Karnataka, Andhra Pradesh, and Telangana, the situation is nearly as calamitous (see map of India’s provinces here).

Retired Tamil Nadu public works official S. Thirunavukkarasu recently noted:

“It is a drought we have not seen in 110 years. Extreme weather events are becoming more frequent and it is due to global climate change. We may see a repeat of 2015 [floods] next year or the rains may fail again like they did in 2016. We cannot figure the weather out. But we need to ensure that we are prepared.”

Throughout the region and over other parts of India, residents are relying on ground water or water supply trucks as lakes and rivers run dry. Ground water supplies are being drawn down at an alarming rate. Water depths that should comfortably sit at 2-3 meters underground have been driven back to 8-15 meters or more. In some locations, wells are being driven as deep as 80 to 90 meters in search of water.

(Though southern India and Sri Lanka are hardest hit, long-term drought is impacting nearly all of India. Image source: NOAA.)

It’s a water crisis that is wide-ranging — impacting both rural locales and population centers like Delhi. Public officials are being forced to divert water from construction and other industries in order to ensure that residents receive access to life-giving supplies.

As with last year, reports are trickling in that tens of millions of people across India are experiencing water stress. Two years of delayed monsoons and severe hot seasons have already left the country reeling. This year’s extended hot season adds insult to injury. And with Pacific Ocean surface temperatures in the Equatorial region tracking above average for this time of year, it is again uncertain that present assurances of a ‘normal monsoon season’ will bear out.

Cyclical droughts and heatwaves are normal for India. What is not normal is the present situation of continuously worsening conditions. These ever-intensifying droughts and heatwaves are being driven by a global warming primarily brought on by fossil fuel burning. And, in the end, relief for India will only come when the warming ceases.


Five States Face Drought Made Worse by Early Onset of Summer


Earth Nullschool

One-Third of Indian Population Stares at Drought This Summer

Delhi on the Verge of Groundwater Crisis

Capital City Reels Under Severe Water Shortage

Heatwave Across North, Central and Western India

The Indian Hot Season Began Two Months Early This Year

Hat tip to Colorado Bob

The Permafrost is Thawing 20 Percent Faster Than Previously Thought

Even in a world at 1 to 1.2 C warmer than 19th Century averages the permafrost is in trouble.

Already, vast thawed lands are starting to release carbon dioxide and methane. Thermokarst lakes bubble with the stuff. And pingos are now starting to erupt as the ice relinquishes the soils of Siberia. Russians, ironically concerned about the safety of an oil and gas infrastructure that helped to precipitate the warming in the first place, are starting to install seismographs to detect these new warming-induced eruptions from the thawed lands. Meanwhile, each new summer brings with it ridiculously warm temperatures, never before seen Arctic thunderstorms, and epic wildfires that rage over these growing piles of peat-like carbon laid down during the course of millions of years of glaciation — but now unlocked in just years and decades by an unnatural thaw.

Permafrost Thawing at 20 Percent Faster Rate Than We Previously Thought

Back in the late 1800s, permafrost covered about 17 million square kilometers of the Northern Hemisphere. In less than 150 years, that extent has been reduced by 2 million square kilometers due to the warming that has, to date, been produced by fossil fuel burning and related carbon emissions. Even worse, according to the new research, present temperatures alone are enough to, this Century, push permafrost coverage back to 12.5 million square kilometers.

That’s about 1/4 of the world’s permafrost gone due to just 1 to 1.2 degrees Celsius of global warming.

(A new study shows that 2 C worth of warming nearly cuts preindustrial permafrost extent in half to around 9 million square kilometers. Warming to 6 C above 1880s averages, which will occur so long as fossil fuel burning continues, will wipe out nearly all of the Northern Hemisphere’s permafrost. These thaw rates are about 20 percent more than previously estimated. Image source: An observation-based constraint on permafrost loss as a function of global warming.)

Warm the world by just another degree Celsius to 2 C above 1880s averages and, according to the new research, we’ll end up thawing another 3.5 million square kilometers of frozen ground to an ultimately reduced area of around 9 million square kilometers — cutting the Northern Hemisphere’s original permafrost coverage nearly in half.

Still More Urgency For Rapid Cuts to Fossil Fuel Burning

This newly identified permafrost thaw rate in response to human-forced warming is much faster than previously expected — representing a 20 percent acceleration compared to past permafrost thaw model estimates. And since the frozen ground of the world contains 1.2 to 1.4 trillion tons of carbon locked away over the course of millions of years, so rapid a thaw has big implications in a world warmed by fossil fuel burning.

(Wildfires burn through Siberia during August of 2014. Thawing permafrost lays bare billions of tons of carbon that can then be subject to release by microbes and the warming elements. Bacteria can break down the carbon — releasing methane and CO2. Thawed permafrost also forms a peat-like layer that can burn as more extensive fires rage across the heating Arctic. Image source: LANCE-MODIS.)

Back in 2015, scientists estimated that about 100 billion tons of permafrost carbon would hit the atmosphere over the course of the 21st Century due to human-forced warming. This warming feedback is equivalent to about 10 years of present fossil fuel emissions. Add an estimated 20 percent extrapolated from a faster than expected thaw to that rate and you end up with roughly 120 billion tons of carbon — or 12 years of present emissions bubbling and bursting up out of that previously frozen ground (approximately 40 ppm of CO2e heat forcing as feedback to the present warming).

It’s just another scientific finding of warming-related geophysical impacts occurring on timescales that were faster than previously expected. Still more added proof, as if we required any, that the need for cutting human fossil fuel emissions couldn’t be greater or more urgent. And when seismographs are now being constructed to detect permafrost methane bursts due to pingo detonations, it’s becoming more and more clear that we do not want to precipitate any more volatile Arctic thaw than we’ve already locked in.


An observation-based constraint on permafrost loss as a function of global warming

Climate Change and the Permafrost Carbon Feedback


First Seismic Sensor Installed to Detect New Risk of Exploding Pingos

Hat tip to Ryan in New England

Hat tip to Wili

Hat tip to Unnaturalfx

Powerful Storms in a Warming World — Cook is Strongest Cyclone to Strike New Zealand in Nearly 50 Years

About 12 hours ago, at 18:30 local time (06:30 GMT) on Thursday, Cyclone Cook roared out of an ocean that has now been considerably warmed by human-forced climate change to made landfall in the Bay of Plenty region of New Zealand. Packing wind gusts of up 90 miles per hour and lashing the region with 1/2 to 1 inch per hour rainfall rates, the storm is the most powerful cyclone to strike New Zealand since 1968.

Most Powerful New Zealand Cyclone in Nearly 50 Years

(New Zealand under a swirl of clouds as Cook makes landfall. Image source: LANCE MODIS.)

The storm raked a region that had already seen saturating, long-lasting, rainfall from the remnants of Cyclone Debbie just one week before. As a result, trees unable to gain purchase in the weakened soils uprooted en-masse. Power was knocked out in Whakatane and in numerous other locations along Cook’s path — cutting off at least 11,000 residences. Locals described gusts like freight trains as hundreds huddled in evacuation shelters. Flights out of Rotorua, Tauranga, Napier and Hamilton in the North Island, and Nelson and Blenheim in the South Island were all canceled.

The 30 foot swells and a resulting storm surge in the Bay of Plenty region were expected to result in serious coastal flooding and damage to shore-front structures. But the chief worry from the system, after Debbie’s devastating rains, was more precipitation-related flooding.

(GFS 7 day rainfall forecast for New Zealand shows considerably above average precipitation from Cook. See also GFS rainfall model runs.)

GFS model runs indicated the potential for 4-8 inches of rainfall or more near New Zealand population centers along the path of Cyclone Cook. And for many regions, these totals equal about 1-2 months worth of rainfall at this time of year. Last week, 7.5 inches of rainfall over just two days resulted in a levee breach at Edgecumbe on North Island — flooding the entire town and forcing nearly all the residents to evacuate. And there is some concern that Cook’s follow-on to Debbie will produce similar trouble.

Warming Ocean Waters and High Amplitude Waves in the Jet Stream Feed Storm Pattern

Cook is interacting with a trough to the west of New Zealand in a manner that is broadening the storm — spreading its wind field and rainfall over a larger region than a purely tropical system would typically impact. The trough had dipped down from the Southern Ocean through an extended Jet Stream wave before it became cut-off and linked up with Cook.

(Cook is presently centered between New Zealand’s North and South Islands [roughly under the green circle]. The swirl of clouds and wind to the west of Cook is a second low pressure system that was cut off from a trough sweeping south and west of New Zealand on Tuesday and Wednesday. Cook is interacting with this trough in a manner than is broadening its wind field and enhancing rainfall potentials. Image source: Earth Nullschool.)

The far northward extent of this trough is indicative of higher amplitude Jet Stream waves that have been associated with warming temperatures at the polar regions due to climate change. And the zone south of New Zealand over Antarctica has featured a strong dipole — with well above normal temperatures facing off against a wall of cold air. This dipole has facilitated troughs and facing ridges that extended well into the middle latitudes.

(Cyclone Cook fed on far warmer than normal waters which enabled it maintain intensity as it moved into higher latitudes. Interaction with a trough remnant left over from a high amplitude wave in the Jet Stream also contributed to this extreme weather event. Image source: Earth Nullschool.)

Meanwhile, Cyclone Cook itself fed on 1-2 C warmer than normal sea surface temperatures surrounding New Zealand. These warmer than normal waters allowed Cook to retain strength and to interact with the polar originating trough in a manner that arguably intensified and broadened the scope of this severe weather event.


Cyclone Cook: Evacuations as Storm Lashes New Zealand

Concerns Increase as Cook’s Path Shifts Toward Population Centers

Cyclone Cook vs Cyclone Debbie


GFS rainfall model runs

Earth Nullschool

Hat tip to LeslieGraham (please stay safe!)

Hat tip to wili

Unprecedented Harm to Great Barrier Reef From Back-to-Back Bleaching Confirmed

It’s becoming more and more clear that the Great Barrier Reef has been pushed onto the ropes by human-caused climate change. That its very future is now in serious jeopardy. That only swift action by a responsible populace will now be able to save it.

During 2016 to 2017, the Great Barrier Reef experienced an unprecedented back-to-back bleaching event. In 2016, more than 60 percent of the corals of the reef’s northern section experienced bleaching. Ultimately, roughly 2/3 of the shallow water corals along this section of the reef perished.

In 2017, warmer than normal waters shifted south. As a result, the central section of the Great Barrier Reef is presently experiencing 60 percent or higher bleaching rates. Now, mass mortality in regions unaffected or minimally affected by last year’s record bleaching is expected.

(New composite bleaching maps show the extent of the 2016-2017 coral mortality event which now heralds a near-term threat to the continued existence of the reef itself. Image source: ARC Centre of Excellence for Coral Reef Studies.)

In other words, back-to-back torrents of warm water are walking from north-to-south down the reef, taking out corals as they go from year-to-year, like some merciless ocean blow-torch. And what’s happening is that ocean temperatures are now entering a range where this kind of heat-caused mortality event is becoming more and more likely to occur at frequent intervals.

Terry Hughes, in an inteview with The Guardian on Sunday stated:

“The significance of bleaching this year is that it’s back to back, so there’s been zero time for recovery. It’s too early yet to tell what the full death toll will be from this year’s bleaching, but clearly it will extend 500km south of last year’s bleaching.”

The 2017 bleaching is also odd in that it occurred during a time of ENSO-nuetral conditions and during a year when only a weak-to-moderate El Nino is expected. In the past, mass coral bleaching and mortality along the Great Barrier Reef has only happened during very strong El Nino years (1998 and 2016). Meanwhile, this year’s cyclone Debbie appears to have done little to relieve the bleaching stress even as it has driven powerful waves across otherwise healthy sections of the reef — further adding to coral mortality.

Reefs require from 10 to 15 years to recover from the effects of severe bleaching and mortality. They can only bounce back if nearby live corals that survived can regrow into previously denuded sections. But the back-to-back waves of annual heat are ruining that needed connectivity even as the warming ocean is slamming the window shut on the required respite periods.


(The Great Barrier Reef is now experiencing the fastest rate of ocean warming since it began to form about 20 million years ago. Image source: Australia’s Bureau of Meteorology.)

David Sugget, University of Technology Sydney’s lead reef researcher, notes:

“It’s that connection ultimately that will drive the rate and extent of recovery. So if bleaching events are moving around the [Great Barrier Reef] system on an annual basis, it does really undermine any potential resilience through connectivity between neighbouring reefs.”

Since 1900, sea surface temperatures in the region of the Great Barrier Reef during times when the reef is most vulnerable to bleaching — late austral summer and early austral autumn — have risen by 1.5 to 2 degrees Celsius. And the rate of rise during recent years is accelerating. The result is that the risk of multiple severe bleaching events hitting the reef within decadal timescales is now high. And the reef is likely to continue to receive multiple blows as bad or worse than those experienced in the 2016-2017 timeframe.

Some Australian politicians are now promising new laws to help reduce runoff that also stresses the reef. But these policies do not address the root cause of what is now a threat to the reef’s very existence. The bleaching that is killing the reef is caused by ocean warming. And that warming, in its turn, is caused by fossil fuel burning which dumps billions of tons of heat-trapping gasses into the atmosphere each year. According to reports from NOAA, the rate of greenhouse gas accumulation is presently 100 to 200 times faster than at the end of the last ice age. And if this rate of greenhouse gas accumulation continues, there is no chance that the Great Barrier Reef, and most of the other reefs of the world, will survive.



ARC Centre of Excellence for Coral Reef Studies

Great Barrier Reef at Terminal Stage — Scientists Despair

Australia’s Bureau of Meteorology

Cyclone Debbie Strikes Healthiest Part of Great Barrier Reef

Great Barrier Reef Hit By Bleaching For a Second Year in a Row

Australia’s Politicians Have Betrayed the Great Barrier Reef and Only the People Can Save it

Arctic Sea Ice Volume Continues to Crater

“Facts are stubborn things; and whatever may be our wishes, our inclinations, or the dictates of our passions, they cannot alter the state of facts and evidence.”John Adams



(March sea ice volume hit a new record low in the PIOMAS measure during 2017. Image source: Oren and the Arctic Sea Ice Blog.)

This week, measurements from PIOMAS indicate that Arctic sea ice volume for the month of March hit new, all-time record lows during 2017. March 2017 volume, according to the Polar Science Center, dropped about 1,800 cubic kilometers from the previous record low set during the same month in 2011. In total, more than a third of March sea ice volume has been lost since 1979.

The Polar Science Center notes:

Arctic sea ice volume through March 2017 continued substantially below prior years. March 2017 sea ice  volume was 19,600 km3 ,  1800 km3 below the previous record from March in 2011. This record is in part the result of anomalously high temperatures throughout the Arctic for November through January discussed here and here [and here]. February volume was 39% below the maximum March ice volume in 1979,  27% below the 1979-2016 mean, and more than 1.7 standard deviations below the long term trend line.

This increasingly thin ice cover should continue to grow a little more to reach a seasonal peak during the first or second week of April. And as you can see when looking at the graph below, the trend line following that peak does not paint a very optimistic picture for sea ice resiliency during the 2017 melt season.

(The rate of sea ice refreeze this year has been very slow. As a result, the trend line points toward the potential for a melt season that exceeds even the record low year of 2012. Image source: PIOMAS.)

Merely transposing the present gap between March 2017 and the last record low to the end of melt season in September would about split the difference between 2012’s record melt and a completely ice-free Arctic Ocean — leaving about 1,700 km3 sea ice remaining by September of 2017.

A more detailed meta-analysis of this rather ominous-looking trend line finds that after hitting a peak of around 20745 km3 of sea ice sometime this month, an average of 18270 km3 of this ice will tend to melt out during the spring and summer so long as the past 10 melt seasons are a reliable predictor of future results. If this happens, sea ice volume will hit a new record low of around 2,530 km3 by September — which would be about 1/3 smaller than the amount of ice remaining in the Arctic Ocean following the tremendous 2012 melt season. And a very strong melt season — similar to conditions seen in 2010 — could reduce the ice to less than 1,000 km3 which is well into the range of a near-ice-free state.

(The Arctic has never been so warm in winter as the number of freezing degree days hit a new record low during 2016-2017. For context, the less freezing degree days the Arctic Ocean sees, the closer it is to melting. Image source: Cryosphere Computing.)

Of course, April through June could see cooler conditions — which would tend to preserve more ice and tamp down the ultimate rate of loss. But the present record low sea ice volume and near record low extent sets up a situation where darker seas will absorb more sunlight and stack the odds in favor of warmer than typical conditions and higher overall rates of melt. Meanwhile, presently strong sea ice export through the Nares and Fram Straits appears to be continuing a trend of relative sea ice volume loss through early April.




The Arctic Sea Ice Blog

Cryosphere Computing

Pair of Arctic Storms Sparked Severe Polar Warming, Sea Ice Melt For November of 2016

Hat tip to Ryan in New England

Hat tip to Cate

Hat tip to Yvan

New Study: What’s Scarier than the Permian Extinction? Burn All the Fossil Fuels to Find Out.

If we burn all the fossil fuels “not only will the resultant climate change be faster than anything Earth has seen for millions of years, the climate that will exist is likely to have no natural counterpart, as far as we can tell, in at least the last 420 million years.”  — Gavin Foster, Professor of Isotope Geochemistry at the University of Southampton


Back in the 1780s as coal-fired smoke stacks sprouted across England to belch their black soot into the hitherto virgin skies of Earth, it’s likely we had not yet an inkling of the vast destruction these dark Satanic Mills were ultimately capable of unleashing:

(Scientists have now found that burning all the fossil fuels through about 2250 could result in conditions that are worse than those that occurred during the Permian Extinction of 252 million years ago. Video source: Catastrophe — The Permian Extinction.)

Svante Arrhenius, by the late 19th Century, had hinted that coal burning might warm the Earth by a tiny bit in a few thousand years. But the very fossils we were digging up and burning at an ever-more-rapid pace warned of a different and far more ominous story (see video above). They hinted of a time when massive volumes of ancient carbon stored in the Earth were released into the atmosphere over the course of thousands of years. And that this release created such hot and toxic conditions that, for most living things, the Earth was no longer habitable.

Unsafe Warming

The Permian-Triassic Extinction of 252 million years ago was the worst hothouse catastrophe that has ever occurred in all of the geological record. It wiped out 96 percent of marine species and more than 70 percent of terrestrial vertebrates. It was the worst of many such hothouse events sparked by rising levels of greenhouse gasses that now serve as a clear warning in the fossil record of the dangers we invite.

Today, after merely 230-odd years and following the emission, by fossil fuel burning, of hundreds of billions of tons of carbon into the atmosphere, the Earth has warmed by far more than just a tiny bit. The glaciers are melting, the seas are rising, the corals are bleaching from the heat of it all, and unprecedented (to modern humans) droughts, heatwaves, storms and wildfires are all being unleashed.

(Unsafe at any warming. As of 2014 the world was about 0.8 C hotter than NASA’s 20th Century baseline — which was already hotter than any previous time period in which human civilization existed. By 2016, that line had moved up to 0.98 C hotter than the NASA 20th Century range and 1.2 C hotter than 1880s averages. Image source: Precarious Climate.)

And though climates have changed in the past, the new scientific evidence indicates that what is happening today is clearly unusual:

Scientists can seek to understand past climates by looking at the evidence locked away in rocks, sediments and fossils. What this tells us is that yes, the climate has changed in the past, but the current speed of change is highly unusual. For instance, carbon dioxide hasn’t been added to the atmosphere as rapidly as today for at least the past 66m years.

By burning fossil fuels, we have crossed the threshold into a new age of trouble. But all the present calamity is just a foretaste of how bad things could get if we fail to stop burning the fossil fuels and to halt a great and vastly harmful emission of carbon into the Earth’s atmosphere.

For, according to our best present knowledge, in the Earth there still remains enough fossil carbon to raise the current level of atmospheric CO2 (CO2e) from today’s highly elevated 405 parts per million (493 ppm CO2e) average to over 2,000 parts per million by around 2250. And a new scientific study now confirms that if all this fossilized carbon is burned by then, the amount of heat trapped in the Earth’s atmosphere will become greater than during the worst mass extinction event in the Earth’s deep past (rising by about 10-18 degrees Celsius above 1880s levels).

(The potential and likely global impacts of climate change are bad enough during the 21st Century with between 1.5 and 6 C + warming expected. But if we burn all the fossil fuels, new science indicates that about 10-18 C worth of warming is ultimately possible. Looking at these impacts, what sane person would recommend doing such a thing? Image source: Climate Impacts.)

Unprecedented in 420 Million Years

This new study shows that fossil fuel burning, if it continues, will be enough to produce a warming event that has never happened in all of the past 420 million years by the 23rd Century. From now to then is about the same passage of time that occurred between the 1780s and now. And though humankind and its civilizations are probably capable of surviving the first 230 years of this considerable fossil fuel burning, it is highly doubtful that the same can be said for the next 230 years.

From the study author Gavin Foster:

“It is well recognised that the climate today is changing at rates well above the geological norm. If humanity fails to tackle rising CO2 and burns all the readily available fossil fuel, by AD 2250 CO2 will be at around 2000 ppm — levels not seen since 200 million years ago. However, because the Sun was dimmer back then, the net climate forcing 200 million years ago was lower than we would experience in such a high CO2 future. So not only will the resultant climate change be faster than anything Earth has seen for millions of years, the climate that will exist is likely to have no natural counterpart, as far as we can tell, in at least the last 420 million years.”



Future Carbon Dioxide, Warming Potentially Unprecedented in 420 Million Years

We Are Heading Toward the Warmest Climate in Half a Billion Years

Precarious Climate

Catastrophe — The Permian Extinction


And Did Those Feet in Ancient Time…

Hat tip to Wharf Rat

Hat tip to TodaysGuestIs

Hat tip to Mark Oliver

Hat tip to Wili

Electric Flights Between Major Hubs Possible in Ten Years as Tesla Outpaces Ford & GM Market Value

As the impacts of climate change continue to worsen, the opportunity still exists for leaders and individuals at every level to reduce the coming harms by renewing and redoubling the push for clean energy. And in many places, this kind of strong leadership is happening — just not in the Trump White House.

(Battery gigafactories, solar roofs, electric vehicles and many other renewable energy advances are enabling both energy independence and the potential for a rapid response to human-forced climate change. But obstacles imposed by short-sighted and immoral leaders like Trump could get in the way of these much-needed actions. Image source: Tesla.)

In January, China appeared ready to take the title of clean energy leader away from the United States as it planned to shut down 104 carbon and soot spewing coal-fired power plants. California and New York pledged to redouble support for renewables even as they vowed to fight Trump’s repeal of the Clean Power Plan all the way to the Supreme Court (an all-too clear reminder of why the Republican sabotage of Garland really hurt us all). Meanwhile, 25 cities in the U.S. have now set their sights on getting 100 percent of their energy needs from zero-carbon sources.

Tesla Surges Ahead Despite Negative Attacks

The supporting clean energy industry is also still making great strides despite attacks on helpful climate and energy policy by Trump. Tesla this month announced that nearly 30,000 of its electric vehicles were sold in the first quarter of 2017 — that’s a 69 percent jump in sales over the same period for 2016. The news buoyed Tesla stock prices which are now more highly valued than those of the still mostly fossil-fueled Ford and GM. The news shows that confidence among investors for Tesla’s future success is hitting extraordinary high levels, despite what has been an ongoing negative PR campaign linked to fossil-fuel special interests against the clean energy company.

(Elon Musk mocks those in the investor media who’ve been on what amounts to a multi-year campaign to talk down Tesla at all costs.)

Tesla plans to rapidly ramp up electric vehicle production this year with the entry of the Model 3. The clean energy company is presently on track to sell about 400,000 Model 3’s in 2-3 years. And its Nevada Gigafactory is already ramping up the battery production that will support the new vehicle.

Electric Medium Range Aircraft on the Horizon

Tesla owes a lot of its success to its ability to provide high energy density batteries at a relatively low cost. And the company now produces a wide range of clean energy products from battery storage systems to electric vehicles to solar rooftops. Tesla’s ability to leverage advances in energy storage and renewable energy technology has been a primary key to its relatively rapid short-term success. And it’s these rapid advances in renewable energy that are enabling another wave of products increasingly capable of replacing harmful fossil fuel burning — extending even to medium range aircraft in the near future.

(The Wright 1 by Wright Electric is expected to be able to handle up to 30 percent of global air travel without the use of fossil fuels.)

According to reports from BBC, Wright Electric is set to produce a plane that, within the next decade, will be capable of making medium range flights. It expects to produce an aircraft called the Wright 1 which will be capable of making 300 mile flights using electric engines and battery power alone. The aircraft could, for example, make the trip from London to Paris. Wright Electric says that the new craft would be capable of completing 30 percent of global flights. The aircraft is expected to be considerably quieter than conventional, fossil fuel driven craft. And British low cost flyer — Easyjet — has already expressed interest in the design.

Storage Advances Our Options for Fighting Climate Change

In the past, battery storage energy density was too low to support the needs for most air travel platforms. But recently, both increasing energy density in new batteries and falling costs have been enabling electric flight. That said, electric medium range aircraft would be a real sustainability breakthrough — adding to the biofuel option for air travel.

It is becoming increasingly clear that we have strong options for confronting climate change. With each week there seems to be some new advance or positive movement. But we must make the choice to turn away from harmful fossil fuels together. And, unfortunately, this issue has been clouded by harmful political actors which puts everything we’ve worked for up until this point into jeopardy.


London-Paris Electric Flight in a Decade

Tesla Now Worth More Than Ford, GM


Wright Electric

Hat tip to Wharf Rat

Hat tip to Greg

So Far, 2017 is in the Running to be the 4th Consecutive Hottest Year on Record

We haven’t quite gotten to the global ‘year without a winter’ yet. But it sure looks like we’re heading in that direction –fast.

Due to the highest volume of heat-trapping gasses hitting the Earth’s atmosphere in all of the past 4-15 million years combining with a warming of Pacific Ocean surface waters, the period of 2014 through 2016 saw an unprecedented three consecutive record hot years. With Pacific Ocean waters cooling during late 2016, it appeared that 2017 would become ‘just’ the 2nd to 5th hottest year ever recorded. But that was before the waters off South America’s west coast began to blaze with unexpected heat during early 2017 even as temperatures at the poles climbed to surprisingly warm levels.

(Due to the combined effects of extremely high levels of heat trapping gasses in the Earth’s atmosphere and a switch to the warmer phase of natural variability, the global rate of temperature increase has rocketed over the past three years. 2017 was not expected to continue this trend. But it might. Image source: Karsten Haustein. Data Source: NASA GISS.)

These two sources of unexpected added heat have left their mark. And though it’s still early in the global warming game for 2017, there appears to be an odd, but not entirely outlandish, chance that this year could beat out 2016 as the hottest year ever recorded.

The month of January 2017 came in at 1.14 C hotter than 1880s averages. Meanwhile February measured 1.32 C hotter than this 19th Century benchmark. In total, the first two months of 2017 averaged about 1.23 C hotter than 1880s — which is a hair hotter than 2016’s never-before-seen by modern humans annual average temperature.

(Extreme warmth over parts of Siberia and the Arctic appear to have helped push March of 2017 into the range of second hottest on record. The first three months of 2017 currently appear to be running in a range that’s ahead of 2016 annual record hot average.)

Looking ahead, early indications are that March was also around 1.3 C hotter than 1880s. If a first or second hottest March on record pans out as indicated by early NCEP and GFS model reanalysis, then the first three months of 2017 will come in nearly 0.1 C hotter than all of last year.

During the present human-forced warming trend, it has tended to take about ten years for a global temperature increase of 0.15 degrees Celsius to occur. And that rate of warming is about 30 times faster than the warming that occurred at the end of the last ice age. Since 2013, the world has warmed 0.25 C — which could jump to 0.3 to 0.35 C in the period of 2013 to 2017 if the present trend for this year continues.

There are many months still to go in 2017. So this potential isn’t at all certain at this time. However, with the Pacific Ocean heating up again, it appears that 2017 is going to give 2016 a real run for its ‘hottest ever’ title.



Karsten Haustein

NCAR Reanalysis by Moyhu

Hat tip to Colorado Bob

For Colombia, The Rain Bombs of Climate Change Fell in the Dark of Night

As the lower atmosphere becomes warmer, evaporation rates will increase, resulting in an increase in the amount of moisture circulating throughout the troposphere (lower atmosphere). An observed consequence of higher water vapor concentrations is the increased frequency of intense precipitation events… — NASA’s Earth Observatory


Just off the coasts of Colombia, Ecuador and Peru, the Pacific Ocean has been abnormally warm of-late. For the past month, sea surface temperatures have ranged between 3 and 5 degrees Celsius above average. This excess heating of the ocean surface, facilitated by human-forced climate change, has pumped a prodigious volume of moisture into the atmosphere of this coastal region. Southerly winds running along the western edge of South America have drawn this moisture north and eastward — feeding into the prevailing storms that originate on the Atlantic side of South America and track eastwards.

(Sea surface temperature anomaly map from Earth Nullschool shows 4 degree Celsius above average ocean surfaces just off-shore of Ecuadore and Colombia. These extremely warm waters have helped to fuel very severe storms over Peru and Colombia during recent weeks. Such warm ocean waters are not normal and their highest peak temperatures are being increased by a human-forced warming of the Earth, primarily through fossil fuel burning. Image source: Earth Nullschool.)

Lately, these systems have blown up to enormous size as they’ve run across the Andes or collided with pop-up storms along the coast. And the amount of rainfall coming out of the resulting monster thunderstorms has been devastating. In Peru, hundreds of thousands of people have been rendered homeless by these deluges which have caused the tragic loss of 100 souls, destroyed thousands of buildings, 200 bridges, and 2,000 miles of highway. For the state, the estimated damage toll from this ongoing climate disaster is now 6 billion dollars.

Friday night, a member of this new breed of monster thunderstorms, pumped to greater intensity by the moisture bleed off the record warm ocean waters, unloaded a total of a half-month’s worth of rainfall in just a few hours upon the small Colombian city of Mocoa. More than five inches fell in 1-2 hours on a region where three rivers run out of the mountains toward this community of 40,000. The deluge arrived in the darkness. Its ferocious intensity unleashed a massive flood of boulders, mud, and water as the combined rivers leapt their banks and invaded the town. A nearby hillside, unable to retain integrity beneath this merciless assault of the elements, gave way — burying a large section of Macoa in rubble.

(Extremely high atmospheric moisture loading in the thunderstorm system approaching the Macoa region on Friday, March 31 is indicative of global warming’s impact on the Earth’s hydrological cycle. As oceans and lands warm, the rate of evaporation and precipitation increases. This change generates more extreme versions of storms and droughts by increasing the highest peak intensity for such events. Image source: Earth Nullschool.)

Residents caught unawares were forced to immediately flee homes with little more than the clothes on their backs — carrying infants or dragging children in tow as the flood waters swirled around them and as a wall of moving earth, uprooted trees and large rocks tore through town. Many escaped, but an estimated 254 residents were not so lucky and are now counted among those lost to the raging torrent and landslides.

President Juan Manuel Santos declared the city a disaster zone Saturday even as relief workers searched for survivors in the rubble and as make-shift shelters and hospitals were set up to aid the injured and displaced. According to CBC:

Santos blamed climate change for triggering the avalanche, saying that the accumulated rainfall in one night was almost half the amount Mocoa normally receives in the entire month of March. With the rainy season in much of Colombia just beginning, he said local and national authorities need to redouble their efforts to prevent a similar tragedy (emphasis added).



More Than 200 Killed in Colombia Flood — Swept Away as They Slept

Desperation Sets in as Flood Death Toll Tops 200

Damages Mount in Peru Floods

Earth Nullschool

NASA’s Earth Observatory

Hat tip to Colorado Bob

Hat tip to Zeebra Designs

A Halo of Storms and Heatwaves — New Study Confirms that Global Warming is Wrecking the Northern Hemisphere Jet Stream

“We came as close as one can to demonstrating a direct link between climate change and a large family of extreme recent weather events.”Michael Mann


The Earth is warming, the weather is growing more extreme, and from the observational perspective, it appears that the Northern Hemisphere Jet Stream has undergone some seriously disturbing changes. Over the past five years, this subject has been one that’s spurred heated debate among scientists, meteorologists, and global climate and weather watchers. Now, a new model study finds that it’s likely that the Jet Stream is being significantly altered by human-forced climate change and that this alteration is helping to drive extreme weather events like the 2003 European heat wave, the 2010 Pakistan flood and Russian heat wave, the 2011 Texas heat wave and recent floods in Europe.

(More extreme variation in upper level wind speeds is an upshot of polar warming during boreal summer. The result is that risks of severe heatwaves, droughts, wildfires and floods increases as the Earth warms. Image source: Michael Mann, Penn State.)

From the study:

… our analysis of both historical model simulations and observational surface temperature data, strongly suggests that anthropogenic warming is impacting the zonal mean temperature profile in a manner conducive to wave resonance and a consequent increase in persistent weather extremes in the boreal summer.

What this means is that the new study provides still more evidence that the Jet Stream’s north to south variance is increasing during summer. As a result, it is enabling powerful heat domes to form in regions where winds run from south to north. In regions where the upper level winds run from north to south, it creates cooler zones in which powerful storms can flood large swaths of countryside. In other words, increasingly juxtapposed zones of extreme temperature anomalies and higher atmospheric instability and moisture loading tend to form more and more often. And this results in weather patterns that we have never really seen before.

(An Inconvenient Sequel is a call for action on climate change like we’ve never seen before. And the imperative to act on climate is now stronger than it ever was.)

The fact that the Mann study uses observational and model assessments to find that such changes are likely to very likely now being caused by human-forced warming and related polar amplification is a highly significant scientific finding. It adds one more attribution tie to the extreme weather events that we’ve been seeing with increasing frequency. A tie directly to global warming. And it does so through model studies that identify the underlying physical mechanisms at work. It’s a pivotal moment in the atmospheric sciences. And everyone needs to sit up and pay attention.


Hat tip to Colorado Bob

Hat tip to Cate

Scientific hat tip to Dr Michael Mann

(Please support publicly-funded, non-special interest based science that is now under assault by the climate change denying Trump Administration)

Record Low Sea Ice Maximum a Lock as Arctic Continues Trend of Ridiculous Warmth

Anyone who’s been paying attention to the Arctic knows that it’s seen a ridiculously warm fall and winter during 2016 and 2017. And, unfortunately, new predicted temperature spikes appear to be on tap for the coming days in one of the more climate-sensitive regions of our world.

(Another big Arctic temperature spike is predicted for later this week with readings expected to hit as high as 5.1 C above average for the entire Arctic. So much warmth in this region will continue to put melt press on sea ice, snow packs, permafrost and glaciers. Image source: Climate Reanalyzer.)

High amplitude waves in the Jet Stream, according to the Global Forecast System Model, are set to drive dual warm air invasions into the Arctic. The first warm air invasion is taking place over North-Central Siberia and is the continuation of a general pattern of warm air delivery that has now lasted for about two weeks through the region of the Kara, Laptev, and East Siberian seas. The second, and albeit weaker, warm air delivery is set to run northward through the Northwest Territories of Canada and on into the Beaufort Sea and Canadian Archipelago.

Temperatures in these warm air invasion zones are expected to rise to between 10 and 30 degrees Celsius above average (18 to 54 F above average). In some places covering these warm wind invasion zones, we are also expected to see sporadic above freezing readings and, in the case of the Laptev — periods of liquid precipitation over the sea ice.

(The record low maximum sea ice extent for 2017 looks more and more like a lock as another big temperature spike rushes into the Arctic.)

Overall, Arctic average temperatures above the 66 degree north latitude line are expected to range between 3 and 5 degrees Celsius above average over the next seven days. As anomaly departures tend to tamp down a bit as spring emerges, these are very high temperature deltas for this time of year.

These continued very high temperature anomalies and what is a trend of extreme and extraordinary warmth for the Arctic has kept sea ice extent measures in record low ranges throughout much of late March. Over the coming days, the most recent warm spate will likely produce an ongoing weakening of ice on the Russian side even as the warmer readings across the Beaufort and Canadian Archipelago will tend to tamp down late season ice thickness building (as typically occurs during late March through April) over the last remnants of multi-year sea ice.

(NASA satellite shot of sea ice shows considerable early melt along the Russian side of the Arctic Ocean.)

In the image above, we find that the ice on the Russian side is already broken, thinning, and opening up into numerous polynyas. Ice is particularly reduced in the Kara (lower right) for this time of year. And the break-ups and mobility of the non-fast ice in the Laptev and East Siberian seas are considerably advanced.

As we reported last week, Arctic sea ice volume trends are now in considerable record low ranges and the excess heat on the Canadian and Russian sides will continue to put pressure on those values. Another instance of the ongoing downfall of global sea ice that kicked into high gear during 2016 and 2017 as human forced warming of the climate system through fossil fuel burning took another step toward ever-warmer conditions.



Climate Reanalyzer



Hat tip to Zack Labe

Increasingly Out of the Human Context: Atmospheric CO2 Likely to Hit Monthly Peak Near 410 ppm in 2017

“The rate of CO2 growth over the last decade is 100 to 200 times faster than what the Earth experienced during the transition from the last ice age. This is a real shock to the atmosphere.” — Pieter Tans, lead scientist at NOAA’s Global Greenhouse Gas Reference Network


It wasn’t too long ago that we were talking about atmospheric CO2 crossing the key 400 parts per million threshold. That was 2014. But now, just three years later, atmospheric levels of this key heat-trapping gas are climbing to within striking distance of another, and still more dangerous, atmospheric milestone. 410 ppm.

That’s an increase in the peak atmospheric CO2 value of around 3 ppm per year or more. One that gibes with record annual rates of atmospheric accumulation of this heat trapping gas during 2015 and 2016. And as we approach a new high water mark for atmospheric carbon, we’ve left the 400 ppm level so far behind that it’s likely that we’ll never see even a single day where values at the Mauna Loa Observatory fall below that threshold.

Approaching Another Milestone for Key Heat-Trapping Gas

Instead, primarily through our rampant and incessant burning of fossil fuels, we are racing head-long into an ever-more uncertain climate future:

(The world hasn’t seen such high levels of atmospheric carbon in millions of years. And all that extra carbon is sucking a considerable amount of Earth-altering heat into its atmosphere and oceans. Image source: The Keeling Curve.)

Since late February, weekly and daily CO2 values have ranged between 405 and 409 parts per million. But as CO2 typically peaks during April and May before Northern Hemisphere vegetation begins to draw down carbon in the months of June through September, it appears that we are likely to see top monthly atmospheric CO2 values hit between 409 and 410 parts per million during 2017.

Out of Context Problem

Back in 2014, we were talking about how atmospheric CO2 levels hadn’t been so high in about 3 million years. But a near 410 ppm high water mark would push those comparative timeframes back to between 5 and 15 million years when the world was about 3-4 degrees Celsius hotter than today and atmospheric CO2 ranged from 400 to 500 parts per million (to this point it’s worth noting that atmospheric CO2 equivalent gasses like methane, when added to presently high CO2 levels, will produce a combined total forcing equal to around 493 ppm CO2e by end 2017).

Back then, ocean levels were meters to tens of meters higher than today, the glacial ice of Greenland and West Antarctica was gone or greatly reduced, and even East Antarctic Ice Sheets were smaller. It’s also worth noting that back then, the great apes had just begun to appear and that the first fully developed ancestors of modern humans were still far off.

(NASA provides a new 3-D visualization of carbon dioxide accumulating in the Earth’s atmosphere. Video source: NASA and The Hindustan Times.)

Human beings, and even our furthest distant ancestors, have not experienced climates of the kind we are locking in now.

But as increasingly tough as our present climate situation may seem, there’s another wrinkle to the tale. For from 5-15 million years ago to now, billions of tons of carbon in the form of plant and animal remains has been sequestered in the world’s forests, peatlands, permafrost and oceans. And as the heat-trapping gasses that we have now placed into the atmosphere, primarily through fossil fuel burning, stresses those stores, we risk creating a further warming response coming from the Earth System. Such high atmospheric thresholds should, therefore, be viewed as in a range that produces considerable risk of crossing key climate tipping points and of locking in harmful Earth System changes for very long time periods. And we continue to add to that risk by burning more fossil fuels.


The Keeling Curve


Following Carbon Dioxide Through the Atmosphere

Human Evolution

Climate Epochs: Miocene

Atmospheric Carbon Dioxide Hits Record Levels

From Canada to Siberia, Permafrost Thaw Produces ‘Hell’s Mouth’ Craters, Sinking Lands, and 7,000 Methane Pockets Waiting to Blow 

In places like Canada and Siberia, a memory of ice ages long past is locked away in the very soil. There, dig about three feet down, and you’ll encounter a layer of frozen earth running from 200 feet to almost a mile deep in some places. It’s like a great glacier secreted away underground and covering about 19 million square kilometers of the Northern Hemisphere. We call this frozen ground permafrost.

An Enormous Pile of Sequestered Carbon

Permafrost generally forms in regions where the mean annual temperature is below zero degrees Celsius. And the presently large expanse of permafrost has formed over the past 2-3 million years in which long, cold ice ages and short, and somewhat warmer interglacial periods have dominated.

(Recent research indicates that up to 120 billion tons of carbon could release from thawing permafrost this Century due to the warming that is now being caused by human fossil fuel burning. Such a release would roughly equate to 12 years of present fossil fuel burning adding approximately 40 ppm of CO2 equivalent gasses to the Earth’s Atmosphere [adding about 0.4 C to medium term warming and 0.8 C to long term warming]. The risk posed by this additional carbon feedback coming from the Earth System highlights the need to halt fossil fuel burning as swiftly as possible. Image source: The Impact of Permafrost Carbon Feedback on Global Climate.)

Locked away in all that permafrost is a massive store of carbon. Including peat, methane and methane hydrates, permafrost is estimated to have sequestered some 1,400 to 1,700 billion tons of a material that, if released as gas, could considerably contribute to the volume of heat trapping substances (like CO2 and CH4) already held aloft in the Earth’s atmosphere in a process that scientists call an amplifying climate feedback.

Evidence of Thaw and a Building Carbon Feedback

But now, human fossil fuel burning is causing the Arctic to rapidly warm — at about 3 times faster than the rate of warming for the rest of the globe (0.6 C per decade in the Arctic). And with atmospheric CO2 concentrations presently above 400 parts per million (and CO2e concentrations above 490 parts per million), the world is now starting to thaw out of the icy period of the last 2-3 million years. As a result, the permafrost is melting.


(Thermokarst lakes near Hudson Bay. Image source: Commons.)

When permafrost melts it changes the land around it. Often times, land subsides and deforms as the icy permafrost below collapses when it thaws. The resulting underground cavities can also telegraph to the surface in the form of sink holes. In places where microbes or hydrates are present, the cavities can fill with gas — which can sometimes erupt in a methane blow hole or ‘hell’s mouth’ crater. In Canada, a new study recently discovered that 52,000 square miles of northwestern permafrost is already thawing. The thaw is producing large sink holes, causing coastlines to rapidly erode, and proliferating the round ponds known as thermokarst lakes.

But it’s not just Canada that’s feeling the thaw. In Siberia, warming is also eating away at the permafrost. And what is happening there is arguably on a much grander and more disturbing scale than what we presently see in Canada. In East Siberia, for example, a 100 meter deep, 1 kilometer long crater has formed in the sagging Permafrost. It is officially called the Batagaika craterBut the locals know it as the Gateway to the Underworld. The crater began as a small deformation during the 1960s when permafrost thaw in the region initiated. It has, over the decades, grown considerably larger — with the growth rate accelerating along with permafrost melt during recent years.

(Time lapse of Batagaika Crater expansion from 1984 to 2016 as provided by Google’s Earth Engine.)

Further west, the Yamal region of Russia is seeing strange bulges dispersing across the land. The bulges, according to Russian scientists and to reports in the Siberian Times, are being caused by bubbles of methane gas beneath the surface. The scientists state that these formations are likely being triggered by warming — in which either methane hydrates trapped within the permafrost are thawing or where microbes have come in contact with thawed permafrost carbon to break it down and produce methane. And in recent years, this region of Arctic Siberia has seen some very warm temperatures — with readings hitting as high as 35 C (95 F) during the summer of 2016.

These same researchers now note that some 7,000 underground methane bubbles exist in this region and that warming is pushing them to erupt. When the pressure below the land surface reaches a critical point, the Siberian Times report suggests that the land above can be displaced — bursting outward. The Siberian Times went on to note that large holes forming in the Yamal region during 2014 and 2015 were caused by just this kind of methane eruption.

(The Yamal Crater was one of the first indications that methane pockets forming beneath the Siberian Tundra were starting to erupt due to human-forced warming. Image source: The Siberian Times.)

Touchy Subject Scientifically and Politically

Permafrost thaw producing high volumes of feedback carbon release can be a touchy subject in the sciences and politically. The reason is that rational responses to this threat moves decision points forward on human carbon emissions cuts and it adds to the concern that atmospheric carbon capture will be needed later this century and on through many centuries to follow in order to prevent a scenario in which carbon feedbacks cause a form of warming runaway.

It doesn’t help that the science on permafrost carbon feedback is also new and rife with uncertainty — generating a kind of gray area in which rumors and misinformation can multiply. And there also appears to be some indication that the fossil fuel industry is attempting to use the issue to push gas extraction and burning in the Arctic — falsely claiming that all of the gas is going to release anyway. Which is not true — a portion of the permafrost carbon and related methane would remain sequestered even as human extraction efforts, if they continued indefinitely, would ultimately result in the release of a much larger portion of this carbon to the atmosphere than mere feedbacks alone.

It is worth noting that presently accepted science indicates that the present rate of atmospheric carbon release due to fossil fuel burning is likely many times that of the potential annual carbon release coming from the permafrost even under the worst case warming scenarios. And because that realized rate of permafrost carbon release is directly tied to how much fossil fuel we ultimately burn, we should be very clear that the urgency to cut these emissions couldn’t be higher.



The Impact of Permafrost Carbon Feedback on Global Climate

The Siberian Times

Massive Permafrost Thaw Documented in Canada

Time lapse of Batagaika Crater expansion

Batagaika Crater

Hat tip to Colorado Bob

Hat tip to Cate

Hat tip to Andy in San Diego

Arctic Entering Its Hottest Period in 2.5 Million Years as Last Remnants of Laurentide Melt Away

“This is the disappearance of a feature from the last glacial age, which would have probably survived without anthropogenic greenhouse gas emissions.” — Adrien Gilbert


There are many ways to tell the Earth’s temperature. One is by measuring how warm the atmosphere is near the surface. Another is to track the heat content of the world’s oceans. Still another is by taking account of melting glaciers and comparing thaw lines with times in the geological past.

And according to new research, the present state of the Barnes Ice Cap — which is the last tiny remnant of the once vast Laurentide Ice Sheettells a tale of heat not seen in 2.5 million years.

(NASA satellite shot of the last melting remnant of the Laurentide Ice sheet on August 30 of 2016. Want to see a time lapse of Barnes Ice Cap melt from 1984 to 2015? Take a look at this GoogleEarth time lapse, zoom in on Baffin Island, find the ice cap, and watch the edge lines retreat. It’s a bit uncanny..)

Over the past 2.5 million years, the Laurentide Ice Sheet has swelled and shrunken as cold ice ages were followed by warm interglacials. During the height of each ice age, the glaciers of Laurentide expanded to cover most of present day Canada and parts of the Northern United States. And during warmer interglacials, the ice sheet retreated to its final stronghold of the Barnes Ice Cap on Baffin Island.

But now, scientists have found that the Barnes Ice Cap, and with it the last remains of the Laurentide Ice Sheet, is about to disappear. Projections indicate that the considerable warming the Arctic is now experiencing, due primarily to fossil fuel burning, will completely melt this half-a-kilometer tall mountain of ice in just 200 to 500 years.

Once that happens, the Laurentide Ice Sheet will be gone. And this will be the first time such a thing has happened in 2.5 million years.

(Recent decline of the Laurentide Ice Sheet during the end of the last ice age to 1,000 years before present. Soon, this once great mass of ice will be completely lost. Yet one more casualty of human fossil fuel burning.)

Though the Barnes Ice Cap may now be rather small compared to the larger ice masses of Greenland and Antarctica, its melt serves as a further sign that glaciers in those regions are also at risk. Gifford Miller, the associate director of CU Boulder’s Institute of Arctic and Alpine Research who has conducted research on Baffin Island for many decades notes:

“I think the disappearance of the Barnes Ice Cap would be just a scientific curiosity if it were not so unusual. One implication derived from our results is that significant parts of the southern Greenland Ice Sheet also may be at risk of melting as the Arctic continues to warm.”

Which is why many researchers are now saying that the imminent loss of Barnes serves as a kind of glacial melt canary in a coal mine.

The study authors further note that even if fossil fuel burning were to stop now, the total loss of the Barnes Ice Cap would still occur. What this means is that some parts of the Arctic are now likely as hot or hotter than they were at any time in the last 2.5 million years — the time when Barnes first formed. And, as the World Meteorological Organization noted so cogently this week, it also means that we’re heading deeper and deeper into an uncharted climate.



Last Remnant of North American Ice Sheet Set to Vanish

Climate Change Has Pushed Earth Into Uncharted Territory


GoogleEarth time lapse

Hat tip to Colorado Bob

Hat tip to Keith Antonysen

Hat tip to Kevin

India Already Facing Water Shortages Ahead of Dry Season

Spring in India can be a rough time for farmers in a warming world.

The vast, flat lands that compose much of India depend on waters flowing down from snow melting in the Himalayas. And a reliable influx of moisture in the form of the Southeast Asian Monsoon is a much-needed backstop to the heat and dryness of April, May, and early June.

But the warming of our world through fossil fuel burning and related greenhouse gas emissions is causing the glaciers of the Himalayas to melt. It is causing temperatures during spring to increase — which more rapidly dries the rivers and wells of India’s plains. It is creating a hot, dry atmospheric barrier that increasingly delays the onset of India’s monsoon. And since the 1950s India’s rainfall rates have been decreasing.

(NOAA rainfall anomaly map for the past six months showing a severe deficit for southern India. With April, May, and June being India’s hottest, driest months, and with climate change producing a worsening water security situation for the state, the risk for yet one more serious water crisis emerging over the coming weeks is high. Image source: NOAA CPC.)

All of these effects are related to human-caused climate change. However, what since the mid-20th Century had been a steadily worsening state of affairs has, over recent years, tipped into a more difficult to manage set of events.

During 2015, a delayed monsoon resulted in India receiving about 14 percent less rain than expected. During 2016, severe heatwaves exacerbated a drought that put 330 million people under water rationing. The 2016 monsoons finally halted this severe water crisis. But underlying shortages persisted through March of 2017.

Today, sections of South India in a region with a combined population of about 145 million continue to see severe water stress. The state of Kerala is experiencing its worst drought in over a Century. Tamil Nadu, which slipped into drought on January 10th, now shows all 32 districts reporting water shortages. And in Karnataka, reservoir levels have now dipped below 20 percent as almost all districts were reporting drought conditions. Farmer suicides from these regions remained high throughout the year. And reports indicate that inability to grow staple crops in these regions has resulted in reports of people relying on eating rats for food.

(Sea surface temperature anomaly map by Earth Nullschool. Warm sea surface temperatures in the Equatorial Pacific can help to delay India’s monsoon — extending the hot, dry period of April, May and June. This year, NOAA predicts that a weak to moderate El Nino may form which would further exacerbate climate change driven water stresses in India.)

These are tough conditions. But the worst may be yet to come for 2017.

April, May and June is the hottest, driest period for India. And the state is entering this season with almost a 150 million people already facing water stress. Moreover, the warming of Equatorial waters in the Pacific as another El Nino is again expected to emerge increases the risk that the 2017 monsoon could be delayed or weakened. So with a water crisis now ongoing in the south, conditions are likely set to worsen soon.


Farmers Despair Amid Low Rainfall

Climate Change Key Suspect in Case of India’s Disappearing Ground Water

India Drought Affecting 330 Million People After Two Weak Monsoons


Earth Nullschool

Himalayan Glaciers are Melting More Rapidly

Frailest-Ever Winter Sea Ice Facing a Cruel, Cruel Summer

This past weekend, it rained over the ice of the late winter Kara Sea. Falling liquid drops that whispered of the far-reaching and fundamental changes now occurring at the roof of our world.


For an Arctic suffering the slings and arrows of human-forced global warming, the winter ended just as it had begun — with an ice-crushing delivery of warm air from the south.

A burly high pressure system over Russia locked in an atmospheric embrace with a series of low pressure systems stretching from the Barents Sea down into Europe. Winds, originating from the Mediterranean rushed northward between these two opposing weather systems — crossing the Black Sea, the Ukraine, and swirling up over Eastern Europe. The winds wafted warm, above-freezing air over the thawing permafrost of the Yamal Peninsula. And the frontal system they shoved over the melting Arctic sea ice disgorged a volley of anomalous late-winter rain.

(Another ice-melting warm wind invasion rushes into the Arctic — this time through the Kara and Laptev Seas. Image source: Earth Nullschool.)

As this rain hissed over the ice, delivering a load of heat to its fractured and frail surface, temperatures above the Kara Sea rose to 1 to 2 C — or about 25 to 30 C warmer than average (42 to 54 F warmer than normal). Meanwhile, the frontal boundary lofted by the warm winds rushed on — pushing above-freezing temperatures all the way into the Laptev Sea north of Central Siberia.

This most recent rush of warm air to the ice edge region came as a kind of herald for the start of melt season. Melt season start is an event that takes place every year at about this time. But during 2017, the sea ice set to begin this annual melt has never been so weak. The fall and winter warmth has been merciless. Month after month of far warmer than normal temperatures have pounded the ice. And now both sea ice extents and volumes are lower than they have ever been before — or at least since we humans have been keeping track.

Third Consecutive Record Low Sea Ice Extent Maximum

Neven and the sea ice observers over at The Arctic Sea Ice blog produced the following graph depicting what is all-too-likely to be a 2017 in which the sea ice extent maximum just hit another annual record low:

(2015, 2016 and 2017 produced record low or near record low winter maximum years for sea ice extent consecutively. Image by Deeenngee and The Arctic Sea Ice Blog.)

Neven, who is one of the world’s top independent sea ice analysts, noted Sunday that:

After a drop of almost 262 thousand km2 in just three days, it looks highly likely that the maximum for sea ice extent was reached two weeks ago, according to the data provided by JAXA, the Japan Aerospace Exploration Agency (via ADS-NiPR ; it used to be provided by IJIS).

As melt season starts, another record low for sea ice extent maximum raises some serious concerns. The less ice that covers the ocean, the more dark blue surface is left open to absorb the sun’s rays. And this loss of ice poses a problem in that a less ice covered Arctic Ocean can take in more heat during melt season — which can serve as an amplifier for melt rates.

During 2015, Arctic sea ice extent also hit a record low maximum, which was nearly beaten again in 2016. But these losses thankfully did not translate into new record lows by the end of the 2016 summer melt season. Weather, as ever, plays its part. And there is some evidence to indicate that increased cloud cover caused by higher levels of water vapor above the Arctic may help to shield the ice somewhat during warmer months. A feature, however, that did little to prevent severe sea ice losses during the record summer melt of 2012 in which a powerful Arctic cyclone also played a roll in ice melt.

Arctic Sea Ice Volume Looks Considerably Worse

Sea ice extent is the measure of how much ocean the ice covers to its furthest-reaching edge. But it’s not the only measure of ice. Volume, which is a measure of both sea ice area and thickness, probably provides a better overall picture of how much ice is left. And the picture of sea ice volume going into the melt season for 2017 isn’t looking very good at all.


(Arctic sea ice volume through late February was tracking well below trend. This considerable negative deviation presents considerable risk for record low sea ice measures by the end of 2017 melt season. Image source: PIOMAS.)

Sea ice volume is now tracking about 2,000 cubic kilometers below the previous record low trend line for this time of year. In other words, the trend line would have to recover considerably over the coming months in order to not hit new record lows by the end of this melt season (September of 2017).

What’s happened is that the ice has experienced three consecutive very warm winter periods in a row — 2015, 2016 and now 2017. And a resulting considerable damage to the ice increases the risk that new all-time record lows will be reached this year. If the present volume measure remains on track through end of summer, sea ice volume could well split the difference between 2012’s record low of approximately 4,000 cubic kilometers of sea ice volume and the zero sea ice volume measure that represents an ice-free Arctic.

Cruel Summer Ahead

(Warm winds, above freezing temperatures, and rain caused considerable sea ice retreat in the Kara Sea from March 14 [top frame] to March 20 [bottom frame]. This event may well have been the herald to a record spring and summer melt during 2017. For reference, bottom edge of frame is 300 miles. Image source: LANCE-MODIS.)

This discussion is worth consideration given how much heat we’ve seen in the Arctic recently. However, we are unlikely to see such a neat progression. Spring and summer surface temperatures could track closer to normal ranges and cloudy (but not overly stormy) conditions could give Arctic albedo an assist — causing the melt rate to lag and pulling the volume measure closer to the trend line. But, it could also vary in the other direction. For post La Nina (we have just exited a weak La Nina) the ocean gyres tend to speed up — which enhances sea ice export — even as more heat tends to transport in the final post El Nino plume toward the poles.

If this particular form of inter-annual natural variability trend toward warmth and melt in the Arctic takes hold during 2017, then we will have less chance to see a spring and summer sea ice recovery toward the trend line. And this is one reason why we’ve been concerned since 2015 that 2017 or 2018 might see new record lows during the summer for Arctic sea ice.



Lowest Maximum Sea Ice on Record (Again)

Earth Nullschool



The Great Arctic Cyclone Hangs On

NASA GISS Temperature Anomalies

Hat tip to Suzanne

March Climate Madness — Wildfires, Scorching Summer Heat Strike Central and Southwestern U.S. By Winter’s End

In Colorado today the news was one of fire. There, a wildfire just south of Boulder had forced emergency officials to evacuate 1,000 residents as more than 2,000 others were put on alert Sunday. Smoke poured into neighborhoods as dead trees killed by invasive beetles or a developing drought, exploded into flames. Depleted snowpacks along the front range of the Rockies combined with temperatures in the 80s and 90s on Sunday to increase the fire risk. Thankfully, so far, there have been no reports of injuries or property loss. A relieving contrast to the massive fires recently striking Kansas, Texas and Oklahoma — where farmers and communities are still recovering.

(The ignition source for the recent fire near Boulder appears to be due to human activity. But the on-the ground climate conditions enhancing tree deaths, reducing snow packs, and blanketing the region with record or near record heat increases the likelihood that a spark will turn into a dangerous fire.)

The record heat building into Colorado on Sunday and contributing to increased wildfire risk had spread up into the Central U.S. from the Desert Southwest. There, cities like Phoenix have experienced summer-like heat for at least the past week. On Sunday, the city saw a second day of record temperatures as the mercury hit 96 degrees (Fahrenheit). Saturday temperatures were almost as hot at 95 F. This was the 8th consecutive day of 90 degree (F) or hotter temperatures (the record stretch of 90 degree + readings for March was set in 1972 at 17 days). Meanwhile, forecast highs in the mid 90s for Phoenix today set the possibility for another record-breaker.

Much of the southwest also experienced record or near-record temperatures. Las Vegas broke new records Sunday as the thermometer struck past 90 (F). Meanwhile, Yuma broke its previous daily record high on Sunday as temperatures rocketed to 98 F.

(Extreme heat builds through the Central and Southwest U.S. on monday as a wildfire forces evacuations south of Boulder, Colorado. Image source: Climate Reanalyzer.)

Today, heat is also expected to again build into the central U.S. as parts of Kansas, Texas, Oklahoma and Colorado are predicted to experience temperatures ranging from the upper 80s to well into the mid 90s. Pecos is expected to hit 96 F — which is about 20 degrees (F) above average for a typical March day. And in some regions, such as parts of Kansas, these temperature departures are as much as 25 F above normal. These extreme high temperatures are expected to break numerous records for the region as most of the previous record highs for this area range in the upper 80s.

The heat will bring with it more risk of wildfires and a front sweeping in on Tuesday could increase windspeeds and dry conditions for some regions. Record warm global temperatures, (spurred by human greenhouse gas emissions primarily coming from fossil fuel burning) which are aiding in the systemic, longer term, loss of ice and snow cover while increasing the rate at which drought sets in and spiking the top potential range of temperatures during heatwaves, appears to be combining with a post La Nina trend that typically favors heat and drying in the Central U.S. to set the stage for these extreme conditions.


Fire Near Boulder Forces Evacuations

Drought Monitor

Will Phoenix Break Heat Records for Three Days in a Row?

Record Heat: Hot Temperatures Continue Today

Climate Reanalyzer

Hat tip to Andy in San Diego

Hat tip to Robert Prue

The Glowing Waters of the Arabian Sea are Killing off Ocean Life

“The fish are migrating. They can’t get enough air here.” — Saleh al-Mashari, captain of a researcher vessel in the Gulf of Oman


They are an ancient, primordial race of tiny organisms called noctiluca scintillans. And for millenia they have lived undisturbed in the deep waters between Oman and India. But as human fossil fuel burning forced the world to warm, this 1.2 billion year old species was dredged up from the deep.

Growing atmospheric and ocean heat fed the great storms that make up India’s southern monsoon. And as these storms intensified, they churned the waters of the Gulf of Oman, drawing the ancient noctiluca scintillans up from below. As these dinoflaggelates reached the surface they encountered more food in the form of plankton even as they gained access to more sunlight. Meanwhile, the strengthening monsoons seeded surface waters with nutrients flushed down rivers and streams and into the ocean.

(Noctiluca blooms have become a common feature of the Gulf of Oman and the Arabian Sea. They have also recently appeared off New Zealand, Tasmania, and Hong Kong. Such blooms are a result of warmer waters, more intense storms, related increasing rates of soil nutrients flushing into the oceans due to more intense rainfall events, and other conditions consistent with human-caused climate change. Image source: FaHaD.)

In this newly favorable environment, noctiluca subsequently bloomed. Covering the ocean in a green mat by day and an oddly iridescent blue when disturbed by the waves at night.

Phytoplankton are the base of the marine food chain and noctiluca has been voraciously devouring this key nutrient source over a Mexico-sized stretch of ocean water during recent years. As the noctiluca blooms expanded, they emitted toxins and an ammonia smell that some in the region are calling sea stench. And as the great mats died and decayed, they have robbed the surrounding waters of oxygen.

As a result, mass fish kills have been reported and much of the local sea life has fled the region.

March 2, 2017, image from the NASA MODIS satellite,  shows a mass of noctiluca scintillans blooms in the Arabian Sea off the coast of Oman extending past Pakistan to India.  (Image source: NASA and USGS, via AP)

Earth’s environment usually changes slowly, over the course of thousands or tens of thousands of years. In the past, this has given life a chance to adjust. But the human-caused climate change that is spurring the massive noctiluca blooms in the Arabian Sea is bringing on these new conditions over the mere course of a few decades. Thirty years ago, there was no visible trace of noctiluca in the waters of the Gulf of Oman and Arabian Sea. Now, they have come to dominate.

The oceans beneath the noctiluca mats are now increasingly robbed of life. Oxygen levels are plummeting. The fish can’t breathe there. And one wonders if or when a dangerous and deadly follow-on of hydrogen sulfide producing microbes will begin to spread up from the bottom regions of these oxygen starved waters.


Growing Algae Bloom in the Arabian Sea Tied to Climate Change


Noctiluca Scintillans


Hydrogen Sulfide in the World’s Warming Waters

Hat tip to Andy in San Diego

Hat tip to Mulga

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