The southern Ocean may be melting Antarctic glaciers from below but not so much the sea ice on top
I reckon the maximum sea ice extent occurred on the 26th of September in the Antarctic. I may have jumped the gun on this one but you usually can tell. the 2019-20 season maxima of 18.983 million square kilometres came a little later than usual (average 21st September) this year, and was 3% above the long term average (1988-2016), in fact it was the highest sea ice extent since the record winter season of 2013-14. I haven’t a clue what’s happening with either sea ice in the Antarctica or the fact that it’s shedding so much of its snow and ice from glaciers and bits of the ice shelf falling off, which apparently are subject to melting and erosion from slightly warmer sea water from below due to global warming.
The above chart is a simple count of the number of days that the sea ice extent is either lower than the day before (melt days) or higher than the before (freeze days). Not particularly scientific and rather crude measure but it’s interesting to note that the number of freeze days has been increasing since the start of the satellite at the expense of the number of melt days.