Hot off the heels of a new global temperature record in 2014, January of 2015 hasn’t missed a beat. Global warmth still rages, as bestirred as a Shakespearean prince outraged at loss and betrayal of a once-constant and steady father.
The month, as many, many months preceding, continued to display a reckless accumulation of heat.
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According to NASA GISS, January was 0.75 C above the global 20th Century average, or about 0.95 C above 1880s levels. This departure is somewhat above previous second hottest year place-holders — 2002 and 2003 — which both showed an angry 0.71 C rise. It is, however, behind the record-holding January of 2007 which at 0.93 C above the 20th Century average remains the hottest month in the total global surface temperature measure. The first of many to make attempts on the 1 C departure level.
(Global Temperature anomaly map as provided by NASA GISS.)
Spatial assessment of hot and cold anomalies showed much of the world with hotter than normal temperatures. In the Northern Hemisphere, cooler temperatures were primarily confined to the Northeastern US, Eastern and Northeastern Canada, and a region through Baffin Bay, Eastern Hudson Bay, and the adjacent Canadian Archipelago. In Austral zones, the heat sink of the Southern Ocean continued to display resilience as near-Antarctic regions also showed slightly cooler than normal departures.
But these were the sole significant zones showing cooler than normal weather. In contrast, a broad belt ranging from the tropics through the sub-tropics showed +0.5 to 2 C temperature departures. But the Northern Hemisphere again showed the most significant heat with Northwestern North America, Asia and Europe all showing extreme temperature anomalies in the range of 2 C to 8.1 C above average.
Arctic amplification also reared over the Beaufort Sea and through the Northern Polar zone with heat anomalies in excess of 2 to 4 degrees C above average and with numerous days in which the entire Arctic displayed +3.5 C or higher departures.
(GISS zonal temperature anomalies.)
Zonal anomalies also revealed this trend with a region from 50 to 60 North Latitude showing temperature departures in the range of +2.8 C across the entire Latitudinal belt. Meanwhile, the region of 80 to 90 North was under nearly as strong a departure of +2.5 C above 20th Century averages for that zone. By contrast, the only zonal region with below average temperatures was beyond the 60 degrees South Latitude Line and averaged a rather minor departure of about -0.4 C.
Conditions in Context
The second hottest January on record comes after a Century-long warming trend in which temperaures have risen by an average of about 0.85 C above 1880s levels and about 1.1 C above a low point that occurred around 1910.
(Global Land-Ocean Temperature Index — GISS/NASA.)
This warming is about a 20 times faster pace than at the end of the last ice age. During that time, it took 10,000 years for the Earth to warm by about 4 degrees Celsius. Over a single Century, we have achieved the equivalent to 1/5 post ice age warming on top of 1880 levels. It is also worth noting that recent record warm years in 2014, 2010, and 2005 occurred absent the kind of very strong El Nino that occurred in 1998. Most notably, for 2014, no El Nino was declared at all.
Which shows that for the climate, there is something indeed rotten in Denmark — and everywhere else for that matter.