Enhanced CO2 uptake by photosynthesizing phytoplankton at a shallow Arctic Ocean seep field overwhelms the positive warming potential of emitted CH4. These findings challenge the widely held perception that elevated sea−air CH4 flux always increase the global atmospheric greenhouse gas burden.

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Enhanced CO2 uptake by photosynthesizing phytoplankton at a shallow Arctic Ocean seep field overwhelms the positive warming potential of emitted CH4. These findings challenge the widely held perception that elevated sea−air CH4 flux always increase the global atmospheric greenhouse gas burden.