Pure methane, gas bubbling up from underwater vents, escaping into northern skies, adds to the global-warming gases accumulating in the atmosphere. And pure methane escaping in the massive amounts known to be locked in the Arctic permafrost and seabed would spell a climate catastrophe.
Is such an unlocking under way?
I don't think we'll be able to cope with a methane atmosphere, if for no other reason that it burns in the oxygen. Until the oxygen is gone.
Anyone know the lowest O2 level at which methane won't burn? Is it below what humans can breathe?
Researchers say air temperatures here in northwest Canada, in Siberia and elsewhere in the Arctic have risen more than 4.5 degrees Fahrenheit since 1970 — much faster than the global average. The summer thaw is reaching deeper into frozen soil, at a rate of 1.5 inches a year, and a further 13-degree temperature rise is possible this century, said the authoritative, U.N.-sponsored Intergovernmental Panel on Climate Change, IPCC.
In 2007, air monitors detected a rise in methane concentrations in the atmosphere, apparently from far northern sources. Russian researchers in Siberia expressed alarm, warning of a potential surge in the powerful greenhouse gas, additional warming of several degrees and unpredictable consequences for Earth’s climate.
Others say massive seeps of methane might take centuries.
But the Russian scenario is disturbing enough to have led six U.S. national laboratories last year to launch a joint investigation of rapid methane release.
And in July, IPCC Chairman Rajendra Pachauri asked his scientific network to focus on "abrupt, irreversible climate change" from thawing permafrost.
Entire article.