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Science & ResearchAug 19, 2026

A global atmospheric methane record from a tropical ice core.

Tropical wetlands are widely considered the largest natural source of atmospheric methane (CH 4 ) 1-4 .

Tropical wetlands are widely considered the largest natural source of atmospheric methane (CH 4 ) 1-4 . However, uncertainties about wetland extent and CH 4 production have led to large variations in modelled CH 4 emission trends 2,3 . Most historical reconstructions rely on…

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