Two Patagonian Glaciers Odd Men Out - They're Growing In Extent - National Geographic

[hatrack]

Two South American glaciers are displaying strange behavior for the times: They're growing. Most of the 50 massive glaciers draped over the spine of the Patagonian Andes are shrinking in response to a global warming, said Andrés Rivera, a glaciologist at the Center for Scientific Studies in Valdivia, Chile. (Related: "Mountain Glaciers Melting Faster Than Ever, Expert Says.")

But the Perito Moreno glacier in Argentina and Pio XI glacier in Chile are taking on ice, instead of shedding it. "What is happening … is not well understood," Rivera said. Theories center on the geography and topography of the glaciers; the depth and temperature of the waters where the glaciers end; and how quickly, or slowly, they react to changes in the climate.

Yet overall, "if you account for the gains and losses of all of Patagonia's glaciers, they are losing huge amounts of ice," Rivera pointed out. One hypothesis for the 3-mile-wide (5 kilometer-wide) Perito Moreno's advance is the glacier's apparent insensitivity to changes in what glaciologists call the equilibrium line on glaciers, Rivera said.

Roughly equivalent to the snow line, the equilibrium line is the elevation above which the glacier is growing, due to snow accumulation, and below which the glacier is melting. When this line moves higher up a hill or a mountain due to rising temperatures, for example, more of the glacier is situated in the melting zone, and the glacier retreats. But because Argentina's Perito Moreno glacier is so steep in the area where the equilibrium line falls, climate shifts don't impact the line's movement much, at least as it relates to the height of the mountain, Rivera noted.

EDIT

http://news.nationalgeographic.com/news/2009/06/090622-glaciers-growing.html

[zbdent]

1. that's it ... Global Climate Change is just a farce fronted by Al Gore to sell books ...

:eyes:

[XemaSab]

2. The Little Brown Dog glacier?

:shrug:

[Fotoware58]

3. Not surprising

Out of all the glaciers in the world, we should of expected a few to grow in size due to shifting weather patterns. Mount Shasta also has growing glaciers. Also, some glaciers might appear to be shrinking, acreage-wise, but may also be putting on growth in volume (the opposite is also true). It IS clear though, that shrinking glaciers will be very bad for man, as much of our fresh water comes from them.