Question

methane emissions are expected to rise in the future if the atmosphere warms as projected and melts some of the permafrost in the arctic tundra and the arctic ocean seabed. methane has roughly around 25 times the warming potential of a molecule of carbon dioxide. how is methane a part of a positive feedback loop? methane emissions will increase and the permafrost melting will decrease methanes release into the atmosphere will contribute to further warming, which in turn will release even more methane methane emissions will decrease, the arctic seawater will cool, and there will be a decrease in global warming methane emissions will decrease and the sea water will warm and contribute further to global warming

Explanation:

A positive feedback loop is a process where a change leads to an amplification of that change. In the context of methane, when the atmosphere warms (due to greenhouse gases like carbon dioxide), permafrost melts. Permafrost contains trapped methane. When it melts, methane is released. Methane is a potent greenhouse gas (25 times more warming - potential than \(CO_2\)). So, the released methane causes further warming. This further warming causes more permafrost to melt, releasing even more methane.

Answer:

Methane’s release into the atmosphere will contribute to further warming, which in turn will release even more methane.