How soil frost affects greenhouse gas emissions from Arctic soils

Soil frost is a nearly universal process in the Arctic. In a recent dissertation by doctoral student Marina Becher at Umeå University, it is shown that the frequency and extent of soil frost is important for the release of the greenhouse gas carbon dioxide from arctic soil.Soil in the Arctic has for thousands of years gathered large quantities of decomposed organic matter due to the decomposition being slow at the low temperatures in the region. As temperatures in the Arctic are increasing, there is a growing concern that the organic matter stored in the ground will be decomposed and released as carbon dioxide. Such a process would contribute to the ongoing increase in this greenhouse gas in the atmosphere.

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How soil frost affects greenhouse gas emissions from Arctic soils