Greenland Ice Sheet surface mass budget far, far higher than average

Sixth highest on record.

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Using daily output from a weather forecasting model combined with a model that calculates melt of snow and ice, scientists from the Danish Meteorological Institute (DMI) calculated the “surface mass budget” (SMB) of the Greenland ice sheet.

Greenland Ice Sheet SMB through 2017-18 (top) and 2018-19 (bottom) shown as blue lines. Grey lines show the 1981-2010 average and red shows the record low of 2011-12. Credit: DMI Polar Portal.

When you look at the blue lines on the above graphs, it is quite evident that the Greenland Ice Sheet surface mass budget is far, far higher than the mean.

For this year, the DMI scientists calculated a total SMB of 517bn tonnes, which is almost 150bn tonnes above the average for 1981-2010, ranking just behind the 2016-17 season as sixth highest on record.

The scientists involved, Dr Ruth Mottram, Dr Peter Langen and Dr Martin Stendel, are climate scientists at the Danish Meteorological Institute (DMI) in Copenhagen, which is part of the Polar Portal. They reported their startling findings in a little heralded article on 17 Oct 2018.

See entire article here:

Guest post: How the Greenland ice sheet fared in 2018

https://www.carbonbrief.org/guest-post-how-the-greenland-ice-sheet-fared-in-2018/embed#?secret=Yp1MRwy9Cb

The post Greenland Ice Sheet surface mass budget far, far higher than average appeared first on Ice Age Now.

via Ice Age Now

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December 28, 2018 at 05:10PM

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