Old Rocks
Diamond Member
No, the present volcanic activity in the Arctic is down on the spreading ridge, where it should be. The volcanic activity that triggered the PETM was on the shelf where the clatherates were. And once those clathrates added their CH4 to the atmosphere, and, after it added heat to the atmosphere, and oxidized to H20 and CO2, trapping even more of the sun's heat, then the oceans warmed, and other clathrates outgassed, leading to a rapid warming.
Today, we are increasing the amount of CO2 in the atmosphere more rapidly than the increase at the beginning of the PETM. We are already beginning to see an outgassing of the Arctic clathrates.
There are damned few glaciers that are expanding, and, yes, global warming theory does account for them. What part of increased local precipitation do you not understand?
Mt. Shasta glaciers expand in spite of global warming
Wednesday, July 9, 20
(07-09) 04:00 PDT Mount Shasta --
Global warming is shrinking glaciers all over the world, but the seven tongues of ice creeping down Mount Shasta's flanks are a rare exception: They are the only long-established glaciers in the lower 48 states that are growing.
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Reaching more than 14,000 feet above sea level, Mount Shasta is one of the state's tallest peaks, dominating the landscape of high plains and conifer forests in far Northern California. Nearby Indian tribes referred to its glaciers as the footsteps made by the creator when he descended to Earth. Hikers flock to Shasta every summer to scale them.
With glaciers retreating in the Sierra Nevada, the Rocky Mountains and elsewhere in the Cascades, those on Mount Shasta - a volcanic peak at the southern end of the Cascade range - are actually benefiting from changing weather patterns over the Pacific Ocean.
"When people look at glaciers around the world, the majority of them are shrinking," said Slawek Tulaczyk, an assistant professor of earth sciences at UC Santa Cruz, who led a team studying Shasta's glaciers. "These glaciers seem to be benefiting from the warming ocean."
Climate change has cut the number of glaciers at Montana's Glacier National Park from 150 to 26 since 1850, and some scientists project there will be none left within a generation. Lonnie Thompson, a glacier expert at Ohio State University, has projected that the storied snows at Africa's Mount Kilimanjaro might disappear by 2015.
But for Shasta, scientists say a warming Pacific Ocean means more moist air. On the mountain, precipitation falls as snow, adding to the glaciers enough to overcome a 1.8-degree rise in temperature in the last century, scientists say.
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