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Published on Jun 15, 2012
The green house gas, methane, that is released from the melting northern ice may not be the only problem. You may have heard that the white ice reflects energy and heat back into space, the green house gas reflects it back, trapping it. What you may not have heard is that this energy that is not reflected back into space by the white ice may increase the planetary core temperature, and this may be linked to volcanoes. Super volcanoes may be the cause of one of the past five planetary mass extinctions.
The planet is rich in metals, has a magnetic field, and a molten core. Energy that is not reflected back into outer-space may increase the core temperature through dielectric heating, and through climate change, which would lead to increased volcanic activity.
A hydrogen sulfide bloom (green) stretching for about 150km along the coast of Namibia. As oxygen-poor water reaches the coast, bacteria in the organic-matter rich sediment produce hydrogen sulfide which is toxic to fish.
Hydrogen sulfide has been implicated in several mass extinctions that have occurred in the Earth's past. In particular, a buildup of hydrogen sulfide in the atmosphere may have caused the Permian-Triassic extinction event 252 million years ago.
Organic residues from these extinction boundaries indicate that the oceans were anoxic (oxygen-depleted) and had species of shallow plankton that metabolized H2S. The formation of H2S may have been initiated by massive volcanic eruptions, which emitted carbon dioxide and methane into the atmosphere, which warmed the oceans, lowering their capacity to absorb oxygen that would otherwise oxidize H2S. The increased levels of hydrogen sulfide could have killed oxygen-generating plants as well as depleted the ozone layer, causing further stress. Small H2S blooms have been detected in modern times in the Dead Sea and in the Atlantic ocean off the coast of Namibia.