Just a couple of observations, it is hard to imagine that an increase in air temperature can break up a mile or more thick ice sheet, but vulcanism certainly can and is most likely a large part of the cause of loss
Active Volcanoes under Antarctica
Which means there is a lava chamber down there and a plume.
The other heat sources would take generations to achieve any impact.
This is the Average Air temperature range
"The average annual temperature ranges from about −
10°C on the Antarctic coast to −
60°C at the highest parts of the interior. Near the coast the temperature can exceed
+10°C at times in summer and fall to below −
40°C in winter.18 Feb 2019 "
An air temperature of +10 would struggle to remove last years snowfall
And the average sea temperature range
"
The
Antarctic bottom
water (AABW) is a type of
water mass in the Southern
Ocean surrounding Antarctica with
temperatures ranging from −0.8 to 2 °C (35 °F), salinities from 34.6 to 34.7 psu.
How does such a slight positive seasonable temperature rupture a huge ice sheet miles form the sea?
Answer it simply can't
It has to be coming from geothermal energy on a huge scale.
As to the Global temperatures rising, OK there might be a case there, but in fact there is a very positive aspect of this.
We are overdue for the next glacial period, and having 2 miles of ice over your head would eliminate all northern and southern populations.
Easier to keep the place warm and deal with what comparatively are minor problems than being ground to dust by unstoppable ice sheets that could take thousands of years to retreat.
And it would only take one supereruption of Yellowstone, Tambura or Santorini to create a Nuclear winter and kick in an ice age., and they could happen at any time.
Global warming problems are small beer compared to natural disasters like those.
We could end up having to artificially warm the place up!
Just s thought to consider, if it proves that geothermal plumes under the crust are melting the ice, what good will any new technology we are capable of concocting be?