Killing Heat — It Felt Like 165 Degrees in Iran Today

In Iran it was 115 degrees Fahrenheit today (46 C). Add in humidity and the heat index was a stunning 165 F (74 C). But what they really should be concerned about is the wet bulb reading

A Limit to Human Heat Endurance

Thirty five degrees Celsius. According to recent research, it’s the wet bulb temperature at which the human body is rendered physically unable to cool itself in the shade. At which evaporation not longer cools the skin. A temperature that results in hyperthermia, heat exhaustion and heat stroke — even when sitting still and out of direct sunlight over the course of about 1-3 hours. Basically, it’s the physical limits of human heat endurance.

The primary factors involved in determining wet bulb temperature are atmospheric temperature and humidity. The temperature of an air parcel cooled to saturation (100 percent humidity). Basically, it’s the coolest temperature human skin is able to achieve by sweating.

One of the reasons why high heat and high humidity seem so oppressive is the fact that it interferes with water evaporating from your skin keeping your body at its natural temperature (98.6 F). High heat + high humidity means less cooling at skin level, which can result in a pretty rapid over-heating. We’ve all experienced it, that sense of stifling on a hot, muggy day. And there’s a bone-deep reason why it feels so bad. Hit a too-high intensity and it’s a killer.

Persian Gulf Heatwave

(An oppressive heat dome high pressure system settles in over the Persian Gulf. Image source: Ryan Maue.)

At 47 percent relative humidity and 115 degrees Fahrenheit, it felt like 165 degrees (F) today in Bandar Mahshahr, Iran. That’s a wet bulb temperature of 34.7 C. A temperature near the edge of human limits and the second highest heat index value ever recorded in any official or unofficial measure (the highest unofficial measure was 178 F). It’s the kind of heat that is, quite frankly, deadly.

Heat Dome Settles Over Persian Gulf, Sea Surface Temperatures Spike

Bandar Mahshahr sits at the Northern end of the Persian Gulf. A region of water that features some of the highest sea surface temperatures on Earth. Over the past week, an oppressive heat dome high pressure system began to settle over the region. Air temperatures around the Gulf hit well above 110 F in many locations. In Baghdad, they soared to 122 degrees F (50 C). Yesterday and today, the sea surface temperatures also sweltered — ranging as high as 34.6 C (94 degrees F).

Since ocean surface temperatures produce latent heat and determine the maximum moisture loading of the Earth atmosphere, maximum sea surface temperature is a good basic yardstick to determine if surface wet bulb temperatures are capable of hitting or exceeding the human survivability threshold at 35 C. And what we are seeing is that the near Persian Gulf region is steadily entering this dangerous range.

image

(Sweltering sea surface temperatures like those now visible in the Persian Gulf can support heatwaves that the human body did not evolve to endure. Image source: Earth Nullschool.)

As the heat dome continues to settle in over the next week, there is increasing risk to the people living in the Persian Gulf region. Some have access to cooled shelters, life saving ice and water. But many do not. At particular risk are the over 3 million Iraqis displaced by the violent conflict wracking that fractured state. Chronic electricity and water cuts throughout the region also lends to the overall vulnerability. It’s a current crisis. But it is one that occurs in an overall worsening context.

As the world’s oceans continue to be warmed by heat trapped through human greenhouse gas emissions,  sea surface temperature thresholds will be driven inexorably higher. The potential moisture content in the near surface atmosphere will rise and so will temperatures. This will increasingly generate heatwaves which the human body simply does not have the physical capacity to endure. Overall, this is one of the reasons we see more mass casualty events as a result of heatwaves — like the events occurring this year in Pakistan and India. It’s a case of pushing the atmospheric heat and moisture loading beyond human survivability thresholds. And we’re steadily doing that now. Let’s hope that this week’s Persian Gulf heatwave doesn’t add another hothouse mass casualty event to the growing list.

Links:

Physical Limits to Adaptation

Middle East Broils Under Extreme Heatwave

Iran City Hits Suffocating Heat Index

Earth Nullschool

Pakistan Heatwave Mass Casualty Event

India Heatwave Mass Casualty Event

Hat Tip to Robert in New Orleans

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Growth Shock and Our Climate Change Choices: Mitigation and Adaptation, or Harm

Climate change, a topic that once was the purview of scientists and academics, has now become a central issue in today’s political and social discussion. The primary reason for this shift is the emergence of increasingly abnormal, damaging, and severe weather events that have come with greater and greater frequency to plague the world’s cities, states and nations. Tornadoes have devoured entire towns, hurricanes have become more numerous and powerful, freak hybrid superstorms are now a serious risk, 100 year flood events have become commonplace, wildfires are now endemic, causing damage in the billions of dollars annually, and immense country-spanning droughts now range the globe.

A secondary reason for our growing awareness is that it is becoming obvious that the world’s ice sheets are in rapid retreat even as sea levels are on the rise. Nine out of ten glaciers are in decline. The great ice sheets of Antarctica and Greenland lose hundreds of cubic miles of ice annually. The resultant sea level rise driven by this melt and by thermal expansion of the oceans puts entire cities, states and nations into existential crisis. By the end of this century, practically all of south Florida may be little more than a shrinking archipelago. Some Pacific island nations are planning their inevitable evacuation to places like Australia, New Zealand, or the continents. Almost all coastal cities will be forced to expend significant monies and resources over the next century if they are to have any hope of warding off the rising seas and more powerful storms. An effort that, in the end, may well prove in vain.

It is a slow motion disaster movie script that plays before our eyes now, almost weekly, on the evening news. And there are many, many events that the mainstream media does not cover, likely due to the fact that it has become saturated with stories of this kind.

Growth Shock and Climate Change

Unfortunately this rising climate change emergency is just one aspect of a larger crisis of civilization-wide Growth Shock. Growth Shock is a dangerous condition brought on by a combination of our inexorably expanding global population, our over consumption of renewable and non-renewable resources, and the damage to our environment via carbon pollution that results in climate change. These three forces are all enabled by a great human limiter — Greed — which has been institutionalized in so many of the world’s corporations and is deeply imbedded both explicitly and implicitly in the world’s political systems and ideologies. So to solve climate change, we will also have to do much better at solving the problems of overpopulation, dangerous and violent methods of resource consumption, and the underlying disease of human greed.

To this point it is worth considering a statement from the ground-breaking sustainability work The Limits to Growth:

“If a society’s implicit goals are to exploit nature, enrich the elites, and ignore the long term, then that society will develop technologies and markets that destroy the environment, widen the gap between the rich and the poor, and optimize for short term gains. In short, that society develops technologies and markets that hasten a collapse instead of preventing it.”

I have also just completed my own work on the issue entitled Growth Shock: Tragedy and Hope at the Limits of a Finite World which will see electronic publication within the next two weeks.

Here is the cover image, brilliantly rendered by Matthew Friedman, in which the Vitruvian Man (representing the unsustainable and exploitative structures of humankind) seems to have grown too big for his own good and struggles unhappily against the globe’s confines:

Growth Shock Cover Art

The roll-out for this work will proceed over the next two weeks and it will be managed in such a way as to responsibly redistribute proceeds to charitable causes that, in my view, have been most effective in working to reduce the harm caused by Growth Shock and the related climate emergency (more on this later).

In any case, as climate change is one of the four forces enabling Growth Shock, we have come to a time where we are compelled to make choices and act in ways that prevent further harm through mitigation, to attempt to adapt to the growing nightmare that is now upon us, or to make the choice to fail to act and therefore increase the degree and velocity of harm coming down the pipe.

Mitigation

The obvious and worsening climate emergency that we are now just starting to experience has galvanized a growing cadre of grass roots organizations and individuals dedicated to the cause of preventing as much of the coming damage as possible. These advocates of mitigation believe that strong action now has the greatest chance of reducing future harm. And their efforts and advocacy are based in the sciences. With extreme weather and damaging events ramping up at 400 ppm CO2, the situation is bound to be far worse at 450, 550, 700, or the 900 ppm CO2 predicted under business as usual by the end of this century. Mitigation advocates are clear in the understanding that the less CO2 and other greenhouse gasses we emit, the less dangerous the ultimate crisis will become.

Mitigation and preventing future harm, therefore, must rely on a combination of efforts. Rapidly increasing renewable energy development will be needed to replace a large enough portion of fossil fuel use to sustain life support systems for the planet’s 7 billion human beings. This will involve a politically difficult replacement of fossil energy sources with clean sources like wind and solar as well as the regulation and eventual elimination of carbon emissions altogether. A more efficient use of space and, over all, more efficient life styles will also do much to prevent damage through both reducing energy and materials consumption. Such a transition will be difficult under current economies that are designed to endlessly increase the consumption of materials, labor, and resources all while funneling wealth to the top of social systems. These social and economic structures dangerously enhance the level of damage we cause and so must be challenged and called into question if we are to make much head-way.

To this point, a large shift away from the massive agribusiness of meat farming may well be needed. Today, more than 65 billion livestock are estimated to be held in states of captivity far more brutal and intolerable than even the worst-treated of human criminals. The lifespans of most of these creatures is doomed to a tortuously short 1-4 years and the unspeakable suffering many experience during their times as livestock animals is a black scar of atrocity born by our race.

An estimated 40% of the world’s grain crop goes to supporting this terrible and inhumane manifestation of food industry. Further, the lion’s share of the 30% of human greenhouse gas emissions attributed to human agriculture is based in the meat industry. As such, our industry enhanced dependence on harming animals for food and materials is likely to have to be greatly abated as part of a comprehensive climate change mitigation action. In any case, the amoral practices required by industry to produce such high volumes of meat render it ethically as well as physically unsustainable.

A true comprehensive mitigation will also have to redefine current paradigms of growth and wealth generation. Economic systems will have to become less focused on short term gains and concentrating wealth at the top and more focused on long-term prosperity and survivability through a more equal sharing of and access to more limited resources. The exploitative paradigm of pure capitalism has failed and failed again. This is largely due to the fact that pure capitalism tends to demand all responsibility be placed on the less fortunate and successful masses as the more fortunate are enabled to behave as little more than privileged anarchists. To mitigate the social shocks that are inevitable during a climate crisis and to reign in the massive, excessive and abusive over-use of resources by the wealthy, more responsibility must be demanded from the most privileged members of societies. Wealth compression, therefore, is an effective tool in reducing the harm caused by an over-consumption of resources at the upper rungs of civilization where some members consume more than 100,000 times the resources of a subsistence farmer and about 3,000 times the resources of a person living in today’s middle class.

Since the levels of exploitation and consumption that have enabled climate change to run rampant are encouraged and required by today’s neo-liberal and globalized brand of capitalism, this manifestation of capitalism must be reigned in, caged and defanged if we are to have much hope of mitigating the larger crisis of climate change.

Adaptation

Since we missed our chance to mitigate much of the damage from climate change by about 30 years (we’d have been much better off if we began rapid CO2 reductions, sustainability and wealth compression efforts in the 70s and 80s), a massive effort to adapt to the changes now set in motion will probably be necessary. It is likely that we’ve already locked in many decades of increasingly severe weather, and, likely, centuries of rising seas. Ultimate sea level rise based on the current level of CO2 in the atmosphere will probably terminate at between 15 and 75 feet higher than the current day (rising at between 5 and 15 feet per century). These changes are probably locked in now even if we halt all CO2 emissions today. But, more likely, our best realistic hope is probably to stabilize atmospheric CO2 levels at around 450 parts per million, which would result in higher-end damages being locked in for centuries.

As a result, if we are to continue to have powerful, resilient civilizations at the global and continental levels, then we must do serious work to make those civilizations more resilient. Entire cities may have to be moved or surrounded by increasingly tall flood barriers. New port systems will have to be devised to cope with changing sea levels. Architects and engineers will have to alter building and structure design to deal with more vicious storms and weather conditions. Farming will have to become more adaptive. The world’s agricultural systems will have to do more with less. Most likely, humans will have to rely more on grains, fruits, vegetables and nuts (which are more efficient ways to transfer energy and nutrients to the human body) and far less on meat (also a mitigation as described above). We may need to expend resources to ensure that our fellow living creatures, which provide essential life support services, do not become extinct. In short, what damage we cannot prevent via mitigation, we will have to learn to adapt to. As such, human civilization will probably need to take more responsibility in both defending itself and the natural world from the harm that is now coming.

Harm

With carbon pollution already reaching dangerous and excessive levels, any choices that do not mitigate (prevent) or help adapt to future climate change result in an increasing degree and velocity of harm. These choices include climate change denial — which not only insanely disputes the basic physical science behind the effect of greenhouse gasses on Earth’s climate but also ignorantly attributes current increasingly severe weather, temperature and sea level rise to a scientific ‘natural variability’ that denial proponents, purposefully or through blatant stupidity, misrepresent and misunderstand. This is not to confuse those who are understandably scared by the force that is climate change and have succumbed to the natural, though in this case irrational, human response to withdraw from and avoid danger. Political climate change denial seeks to exploit this natural human response for short term political and economic gain and, as such, must be viewed as anathema. Human denial and avoidance of harm, however, is a basic instinct-driven response that must be rationally addressed. In the case of harm caused by climate change, the only rational way to avoid it is through mitigation and adaptation. Denial of the physical forces of the universe unleashed by human over-consumption and institutionalized greed, on the other hand, is little more than a withdrawal into the realm of wishful thinking. Denial, in both cases, causes inaction and paralysis, enables the continuation of business as usual, and, therefore, increases harm.

To this point, any efforts to slow down or reduce mitigation efforts also increases the velocity and force of the harm now rushing toward us. Pressures to slowly mitigate and gradually adapt may seem rational at first, but result in a less tenable future long term. Responses need to be measured, organized and swift — like the emergency procession to lifeboats aboard a sinking ship. Irrationally clinging to damaging systems for as long as possible amounts to playing fiddle on the deck as the critical time to find a place aboard a lifeboat trickles away.

Depression is another natural human response to challenges that far exceed the scope of an individual to overcome. In this case, social depression over climate change has manifest in a form of doomerism that clings to the notion that any action in the face of a growing crisis is futile. To the doomers, I would like to say this:

If there is even a small chance that mitigation and adaptation will bring us through the crisis, then shouldn’t we pursue all efforts and make that likelihood as great as possible? What if the British and the French had simply given up in the face of what, to them, must have seemed an invincible German military juggernaut during the early days of World War II (in fact, their early denial that a problem existed at all set up the conditions for this terrible war in the first place)? To the doomers I would say that the more we fail to respond, the worse the crisis becomes. And a crisis always seems most insurmountable at its start and just before creative response is initiated. Though it is true that many civilizations have failed in the past when confronted with problems that are similar to ours and that climate change, especially, tends to crush civilizations by creating problems that are outside of its ability to evolve and adapt, failure to respond almost always ensures collapse. We may argue now that response is too little too late, but we really won’t know unless we’ve expended all efforts. And so all efforts are, therefore, entirely moral and appropriate.

Lastly, a number of entrenched special interests are heavily invested in harm. These include the world’s fossil fuel companies, the industrial meat industries, a number of investment banking firms that support and profit from such activities via financing, and a large supply chain of industries that produce products based on these activities. Since the resources and profits of these industries are, in part, shared with broader society via the stock market and through the production of cheap, easy to access, goods and services, many states, cities and individuals are also, wittingly or unwittingly invested in harm. As such, a turning away from harm will require conscious choices on the part of individuals, cities, states and industries to not only divest in stock portfolios that profit from harm but also to actively change behavior, methods of consumption and materials use. As we begin this process, entrenched industries and individuals that profit from harmful and exploitative activities are likely to dig in and fight every step of the way. They will attempt to deny us product choices via legislation and market dominance even as they attempt to pretend that harm coming from their practices is both natural and inevitable (directly or indirectly enhancing denialism and doomerism). This institutionalized, irrational and entrenched manifestation of human greed represents the center of gravity of harm coming from human systems and, if we can address it, it is likely that both denial and doomerism will fade.

Considering Moral Responses

In the end, any action that delays or prevents a swift, encompassing, and organized response to climate change increases the level of harm that we are in for. Such a choice, whether conscious or not, is essentially amoral in that it reduces civilization’s chance to survive an emerging existential crisis. A choice that eventually results in an escalating level of damage and loss of lives and livelihoods.

So we’ve come to a tough pass and these, whether we realize it or not, are our choices:

1. To prevent and mitigate harm.

2. To do our best to adapt to the harm that is coming.

3. Or to increase the degree and velocity of harm by failing to act.

My best hopes are for your courage to make the just choices for the sake of you, your family, and for all of us. This is our responsibility to ourselves and each other. And the time to act is now, now, NOW.

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