NOT SO GREEN  |  Ignore the Turn Around

By Steven Keeler | Jun 18, 2017
Source: DMI


Over the year, it snows more than it melts, but calving of icebergs also adds to the total mass budget of the ice sheet. Satellite observations over the last decade show that the ice sheet is not in balance. The calving loss is greater than the gain from surface mass balance, and Greenland is losing mass at about 200 Gt/yr.




In contrast, 2013 saw low-pressure and low-temperature conditions, coinciding with the most positive summertime NAO ( North Atlantic Oscillation ) recorded in the past 20 years. Our record demonstrates the impact that these changing atmospheric conditions have had upon year-to-year variability in mass loss and more specifically the potential for intense melt events lasting only a few months to make large contributions to multiyear mass balance.





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