What happens to the rate of methane release from thawing permafrost soil as the depth of the active layer increases?

A)Methane release rates become unpredictable

B)Methane release remains at a constant rate

C)Methane release rates generally increase✓

D)Methane release rates generally decrease

💡 Explanation

Methane production increases as more organic material becomes available for decomposition by methanogenic microbes in the thawed active layer, because increased active layer depth enables greater decomposition; therefore, methane release rates increase, rather than decrease or remain constant.

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What happens to the rate of methane release from thawing permafrost soil as the depth of the active layer increases?

💡 Explanation

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