Greenland

Late season warmth extends 2013 Greenland melt season…briefly

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Submitted by Desert Gypsy on

nsidc.org- 9/7/13

Greenland’s surface ice melt season reached a peak in late July, coinciding with a period of very warm weather. Greenland’s melt season this year will be closer to average than was 2012, with far less melting in the northern ice sheet and at high elevations. Nevertheless, an all-time record high temperature for Greenland may have been set in 2013.

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Update on Greenland Ice Sheet

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Submitted by Desert Gypsy on

Accuweather.com - 7/31/13

 

After a slow start, this year's melt extent (below) on the Greenland Ice Sheet is clearly running higher than the 1981-2010 average. Also, this year's peak is already later than the average.

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Incredible Heat Wave in China, Greenland Record

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Wunderground.com - 7/31/13, Christopher C. Burt

While a lot of attention (justified) has been spent on the record heat in Siberia and Europe this past month, the actual big story so far this summer is the heat wave in eastern China. This July will go down as the hottest ever measured for places like Shanghai, Changsha, and Hangzhou. Records for Shanghai date back to 1873 and no such heat has ever been observed there or in much of Eastern China. BREAKING NEWS: Greenland has just reported its warmest temperature on record.

The provinces most affected by the heat this past July are Anhui, Zhejiang, Jiangsu, Hunan, Jiangxi and, of course, Shanghai. The population of these five provinces is about 314 million, more than the population of the entire United States.

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Cause of Last Year's Record Surface Melt on Greenland

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Accuweather.com - 6/21/13

Key excerpts from the University of Sheffield report......

"Our research found that a ‘heat dome' of warm southerly winds over the ice sheet led to widespread surface melting. These jet stream changes over Greenland do not seem to be well captured in the latest Intergovernmental Panel on Climate Change (IPCC) computer model predictions of climate change, and this may indicate a deficiency in these models. According to our current understanding, the unusual atmospheric circulation and consequent warm conditions of summer 2012 do not appear to be climatically representative of future ‘average' summers predicted later this century.

"Taken together, our present results strongly suggest that the main forcing of the extreme GrIS surface melt in July 2012 was atmospheric, linked with changes in the summer North Atlantic Oscillation (NAO), Greenland Blocking Index (GBI, a high pressure system centred over Greenland) and polar jet stream which favoured southerly warm air advection along the western coast.

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