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PERGAMON
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PERGAMON
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PERGAMON

The Arctic is a key area in our anthropogenically-warming world as massive releases of methane currently locked up in permafrost and gas hydrates, both on land and in marine sediments, could increase atmospheric concentrations of this greenhouse gas much faster than predicted. Large parts of the Arctic region consist of permafrost. Melting of this permafrost leads to the release of methane trapped within or beneath it into the ocean and atmosphere. As most climate models predict a rapid increase in Arctic air and surface-water temperatures within the next few decades, the release of methane from free-gas or as gas-hydrate reservoirs in terrestrial and marine permafrost and from wetlands, tundra and shallow marine sediments, is likely to increase.