While ultimately volume changes over time or SMB are more important I was wondering about the extent percentage. Did the extent percentage for one day melt exceed its current level? Was saying it all melted indicating it reached 100% at some point?
The area of Greenland is 2,166,086 km2
The area of the GIS (Wikipedia) is 1,755,637 km2
The area of the GIS (NSIDC) is 1.71 million km2
The maximum daily melt in 2012 per NSIDC's "Greenland Today" was on July 11 at 1,463,750 km2, 85.6% of the GIS area using the NSIDC measurement.
Although 3 days in 2012 were higher than the current values of 2023 daily melt from DMI, the extreme spike in 2012 only lasted about 7 days, while the current 2023 extreme values have lasted 12 days so far.
So maybe 2023 is setting some sort of record for the length of time of sustained extreme melt.
Caveat: I believe Greenland Today uses a somewhat different algorithm to measure daily melt from that used by DMI. The Greenland Today values of recent years seem to be consistently lower than those of DMI.
So maybe the comparison is invalid? Mixing different measurement systems of the same data seems always to bring problems.