(monthly) resolution." (They even modeled the firn, the granularity of the snow, because it influences the backscattered radar echo.) Their rate of ice loss, -269 Gt/yr, is close to other recent values, and (added 7/7) equivalent to a global mean sea level rise over this period of 0.74 ± 0.14 mm/yr, "approximately double the 1992–2011 mean." They find regions where glacier velocity has increased significantly in recent years -- "...only 0.9% of the total ice sheet area, have contributed more than 12% of the total mass balance during our study period."
But they don't seem to find any downward acceleration in these years:
They don't calculate an acceleration in their paper.... Has melt acceleration stopped, or is this just a blip upward? I would be surprised if it has stopped -- this latest paper only covered a 3-year period, while the others (below) were all over 10 years. That makes it a difficult to detect an acceleration -- just look at any 3-year interval on their graph -- the all look straight.
In any case, here is my collection:
Note 7/13: this is a change from the earlier table; the "--" means the four years in the McMillan et al study was too short an interval to reliably detect an acceleration. See here.
Added 7/13: I give some remarks and clarifications by Malcolm McMillan here.