This thread is about the Surface Mass Balance change (i.e. snowfall) from 1 Sept 2023 to 31 Aug 2024, and Surface Melt April to October 2024,
plus DMI and JPL GIS Mass Loss data from GRACE /GRACE-FO data (whenever it is updated).
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18 July 2024
SMB gain to date is 477GT, 4GT (1%) below the 2017-2022 average of 481GT, and very close to the longterm average from DMI.
N.B. SMB is now reducing as run-off from melt exceeds precipitation.
Daily Melt has increased to extreme levels for the time of year, but below the record high melt in 2023 from now to late July, until this day the 18th July, when melt covered 67% of the GIS.
Despite the high melt, above average recipitation means daily SMB losses have been mostly at or a bit below average, in line with the climate models that forecast a warmer wetter Greenland. The 17th & 18th July have been an exception, with daily SMB loss at 9GT on the 18th.
click images to enlarge; and click gif to start, runs 6 times