Quote:
Originally Posted by tw
Another new problem with old models that may have been too conservative. As ice melts as the poles, higher concentrations of trapped methane are released in amounts so large as to now require additional calculations for 'how fast'. Just another reason why the question is not whether global warming exists, but why the 'how fast' question is so complex.
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There are also great concentrations of methane (actually methane hydrate) all over the oceans, with no polar ice cap over them. They are even in the proposed oil drilling areas.
Therefore, I don't think the shrinking of the polar ice cap
automatically dictates an increase in airborne methane. It does increase the possibility, though.