what an idiotic comparison. How LONG was the Mt Helens explosion? And where is ANYONE talking EXPLODING volcanoes under the WAISheet?
Those coastal glaciers have their footers in the water on top of a toaster oven. The fissures are ACTIVE but not generating explosive magma. So about 10 W/m2 UNDER TREMENDOUS PRESSURE from the ice above is MORE than enough to LUBRICATE their slide and accelerate them to sea.
Thought you were studying Geology there OldieRocks.. Do you not understand that 10W/m2 UNDER THEIR FEET is a HELL of lot more ice destruction than 3W/m2 from GW above? If it even IS 3W/m2 at Antarctica?
And since the heating is there EVERY MINUTE, DAY, MONTH YEAR since only Gawd knows when -- I can pull the same phony stunt that your buddies at skepticalscience pull and measure that TOTAL ENERGY in "# of Mt St Helens". It's a large number which I'm NOT gonna attempt unless you MAKE ME..

but it's more than 2!!! LOL....