NB: This offset is only specific to Antarctica (anticipating denial trolls claiming this shows global warming is a hoax).
This article is about albedo. "whiter" albedo cools the earth.
But the opposite is true. A darker albedo warms the earth (assuming sunshine/clouds are the same).
The Earthshine project measured earths albedo and found it got significantly darker in the 1990s. And then got a little less dark after 1998 when warming stopped.
And albedo changes from 1980s to 1998 (when warming stopped) caused a difference of 6.8W/m2 which is almost triple claimed for all CO2 warming from 1850.
Birger
Jul 10, 2012