NASA Study: Mass Gains of Antarctic Ice Sheet Greater than Losses

[progressoid]

A new NASA study says that an increase in Antarctic snow accumulation that began 10,000 years ago is currently adding enough ice to the continent to outweigh the increased losses from its thinning glaciers.

The research challenges the conclusions of other studies, including the Intergovernmental Panel on Climate Change’s (IPCC) 2013 report, which says that Antarctica is overall losing land ice.

According to the new analysis of satellite data, the Antarctic ice sheet showed a net gain of 112 billion tons of ice a year from 1992 to 2001. That net gain slowed to 82 billion tons of ice per year between 2003 and 2008.

“We’re essentially in agreement with other studies that show an increase in ice discharge in the Antarctic Peninsula and the Thwaites and Pine Island region of West Antarctica,” said Jay Zwally, a glaciologist with NASA Goddard Space Flight Center in Greenbelt, Maryland, and lead author of the study, which was published on Oct. 30 in the Journal of Glaciology. “Our main disagreement is for East Antarctica and the interior of West Antarctica – there, we see an ice gain that exceeds the losses in the other areas.” Zwally added that his team “measured small height changes over large areas, as well as the large changes observed over smaller areas.”

Good news and bad news

“The good news is that Antarctica is not currently contributing to sea level rise, but is taking 0.23 millimeters per year away,” Zwally said. “But this is also bad news. If the 0.27 millimeters per year of sea level rise attributed to Antarctica in the IPCC report is not really coming from Antarctica, there must be some other contribution to sea level rise that is not accounted for.

http://www.nasa.gov/feature/goddard/nasa-study-mass-gains-of-antarctic-ice-sheet-greater-than-losses

[HassleCat]

1. It makes sense

Antarctica is basically a desert. It snows very little there because it's so damn cold. Global warming would put more heat energy into the ocean currents, causing more clouds to form over Antarctica, resulting in more snow. I don't know about the prevailing winds, where adiabatic lifting takes place, and so on, but the basic idea makes sense. Global warming does not necessarily mean less snow and thinner ice in all locations.

[progressoid]

4. Yup. n/t

[Human101948]

2. Great news! Gonna go right out and roll some coal!

http://www.huffingtonpost.com/2014/07/06/rolling-coal-photos-video_n_5561477.html

[progressoid]

3. Good lord.

"You want clean air and a tiny carbon footprint? Well, screw you.”