At Slate, Phil Plait notes a new paper that finds the Antartic is losing 159 gigatonnes of land ice a year.
How does that compare to the increase in Antarctic sea ice, a favorite talking point of [fake] skeptics?
A new paper in the Journal of Climate models Antarctic sea ice and finds it increasing by 30 km3/yr. (There may, though, be problems with the algorithm that calculates the daily sea ice number; more on that here.) Since sea ice has a density of about 870 kg/m3, that's a gain of about 26 Gt/yr.
Note: that's only 1/10th the amount of loss in Arctic sea ice.
I looked up numbers for the rest of the world's ice:
Over a teratonne a year.
So unless the frozen bus stop puddles of the world are gaining over a 1,000 gigatonnes of ice a year -- doubtful even in Canada -- the world is definitely losing a lot of ice. And Greenland's loss is accelerating.
Sources: McMillan et al, Holland et al, PIOMAS, Enderlin et al, Gardner et al.
Correction 5/28: PIOMAS number changed from -300 Gt/yr because, while the volume change is -300 km3/yr, I didn't multiply by the density of sea ice to convert it to mass.