Story perspectives

Arctic Ocean May Reignite Greenhouse Gas Emissions

10/19/2025

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Summary

Story summary

The Arctic Ocean could again become a significant greenhouse gas source due to warming, echoing 56 million years ago.
A Nature Geoscience study of Paleocene-Eocene Thermal Maximum found methane-eating microbes shifted from anaerobic to aerobic oxidation.
The shift could have increased carbon dioxide (CO2) release as conditions changed.
Lead author Bumsoo Kim suggests a switch could occur today, while scientist Sandra Kirtland Turner cautions past conditions may not apply.

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Story summary

The Arctic Ocean could again become a significant greenhouse gas source due to warming, echoing 56 million years ago.
A Nature Geoscience study of Paleocene-Eocene Thermal Maximum found methane-eating microbes shifted from anaerobic to aerobic oxidation.
The shift could have increased carbon dioxide (CO2) release as conditions changed.
Lead author Bumsoo Kim suggests a switch could occur today, while scientist Sandra Kirtland Turner cautions past conditions may not apply.