It’s late and I’m about to nod off, but a few headlines caught my eye. The first is on plastics and its growing ubiquitousness in the natural world. If you read an earlier post I did on this subject, then you’ll know that plastics may well be the one thing that will persist long after industrial civilization has passed into the ether of history. Plastics and nuclear waste will be the lasting reminders of carbon man. As the following article explains, this stuff is showing up in the dark, cold depths of the melting Arctic.
Click to go to original article…
In other news, the ominous threat of a cataclysmic global release of methane from ocean floors is continuing to develop, increasing the possibility of runaway climate change…
A changing Gulf Stream off the East Coast has destabilized frozen methane deposits trapped under nearly 4,000 square miles of seafloor, scientists reported Wednesday. And since methane is even more potent than carbon dioxide as a global warming gas, the researchers said, any large-scale release could have significant climate impacts.
Temperature changes in the Gulf Stream are “rapidly destabilizing methane hydrate along a broad swathe of the North American margin,” the experts said in a study published Wednesday in the peer-reviewed journal Nature.
Using seismic records and ocean models, the team estimated that 2.5 gigatonnes of frozen methane hydrate are being destabilized and could separate into methane gas and water.
It is not clear if that is happening yet, but that methane gas would have the potential to rise up through the ocean and into the atmosphere, where it would add to the greenhouse gases warming Earth.
The 2.5 gigatonnes isn’t enough to trigger a sudden climate shift, but the team worries that other areas around the globe might be seeing a similar destabilization.
“It is unlikely that the western North Atlantic margin is the only area experiencing changing ocean currents,” they noted. “Our estimate … may therefore represent only a fraction of the methane hydrate currently destabilizing globally.”
The wider destabilization evidence, co-author Ben Phrampus told NBC News, includes data from the Arctic and Alaska’s northern slope in the Beaufort Sea.
And it’s not just under the seafloor that methane has been locked up. Some Arctic land area are seeing permafrost thaw, which could release methane stored there as well.
An expert who was not part of the study said it suggests that methane could become a bigger climate factor than carbon dioxide.
“We may approach a turning point” from a warming driven by man-made carbon dioxide to a warming driven by methane, Jurgen Mienert, the geology department chair at Norway’s University of Tromso, told NBC News.
“The interactions between the warming Arctic Ocean and the potentially huge methane-ice reservoirs beneath the Arctic Ocean floor point towards increasing instability,” he added.
OK that’s enough information to put me soundly to sleep. Wake me up when the ‘Methane Time Bomb’ nightmare is over. The pot starts to boil, but the frogs are still comfortable…