As Arctic permafrost thaws, methane is released. Last December, we got the bad news that the release could be 2.5 times more than originally estimated. The more methane released, the more the global-warming impact -- and the faster ice melts and ground thaws, and the more methane released.
Permafrost was primarily a concern in the Arctic, not the Antarctic. Today, bad news: The amount of methane released by a melting Antarctic may be equivalent.
The Antarctic Ice Sheet could be an overlooked but important source of methane, a potent greenhouse gas, according to a report in the August 30 issue of Nature by an international team of scientists.
That's according to the University of California at Santa Cruz, which released the findings earlier today. In the Arctic, the gas is in the soil. In the Antarctic, it's also in the ice itself.