Arctic soil may contain more greenhouse-gas material

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Arctic soil may contain nearly twice greenhouse-gas producing orgainic material than previously estimated. A team of scientists dug down more tha one meter into the permafraost to take soil sample from more than 100 sites throughout Alaska. After Analyzing the samples, the research team discovered a previously undocumented layer of organic matter on the top of and in the upper part of permafrost, ranging feom 60 to 120 centimeters deep. This deep layer of organic matter first accumulates on the tundra surface and is buried during the chuning freeze and thaw cycles that characterize the turbulent arctic landscape.