RT @xavierfettweis: 1/2 At this Christmas time, the surface melt extent over the Antarctica ice sheet (~ 14% of area) and production of melt (~ 12GT/day) is 4 times larger than the normal allowing even significant meltwater runoff in some area according to the MAR model. National Snow and Ice Data Center Mission Antarctica by @MissionAntarctica A @grttme project - Other backups: @Hallotme