Methane emission in the Arctic Circle by considering dissolved oxygen concentration

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The greenhouse effect of methane is 25 times as much as carbon dioxide although the decomposition speed of carbon dioxide is slower than methane. Methane is found to occur in the Arctic Circle mainly, in which there are possibilities that permafrost melts more in the future due to the climate change. The occurrence of new ponds induced by the melting permafrost is expected to increase the release of methane. This study thus aims to evaluate the release rate of methane from eutrophicated ponds or lakes by modeling the occurrence of methane from the polluted sediment on the bottom. We attempted to investigate the release rate of methane by taking into account water temperature, sulphate ion concentration, and dissolved oxygen concentration. As a result, dissolved oxygen concentration is found to be the most influential and significant factor which controls the release rate of methane from polluted sediment.