How unusual is the 'new fiscal year' melt? It is way way above 'average' but how about comparing it to other extreme years? (I recall that some graphs showing melt indicate the historical range, less the two most extreme year's data [both high and low], or something like that (i.e., not 2 sigma as is common).
The DMI graphs exclude the two most extreme year's data [both high and low]
DMI (about a year or 2 ago) to publish daily data of SMB change and melt %, starting from Sept 2017 (SMB data) and Feb 2018 (Melt data). These can be found at
http://ensemblesrt3.dmi.dk/data/prudence/temp/PLA/PP_GSMB/However, they have not published the data of the long-term averages of daily SMB change and daily melt, which is a drag.
As regards the early September melt, looking at the DMI graph the Sept to Sept 6 look to be records for the day of the year. From my data early Sept 2021 managed a max of 13%, in the earlier years 6% to 8%.
Definitely early Sept 2022 has been an event worth noting, building on the high but not extreme values of last year.
AND..
NSIDC at
http://nsidc.org/greenland-today/greenland-today-data-and-analysis-tools/ produced a spreadsheet of daily melt data which dates back to 1978-79, which I used to downlaoad.
However, it is held on the net at an ftp address, so I have only got data to 2020. (I have asked NSIDC for help on this) -
I attach 2 graphs from this data - UP TO 2020. From these it still looks as if the September 2-7 2022 data is a record-breaker by far.
AND...
Here is the Graph from Greenland Today which also make it obvious that 2022 is a record