An active atmospheric methane sink in high Arctic mineral cryosols
The transition of Arctic carbon-rich cryosols into methane (CH₄)-emitting wetlands due to global warming is a rising concern. However, the spatially predominant mineral cryosols and their CH₄ emission potential are poorly understood. Fluxes measured in situ and estimated under laboratory conditions...
Published in: | The ISME Journal |
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Main Authors: | , , , , , , , , , , , , , , , , , , |
Language: | unknown |
Published: |
2023
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Subjects: | |
Online Access: | http://www.osti.gov/servlets/purl/1213309 https://www.osti.gov/biblio/1213309 https://doi.org/10.1038/ismej.2015.13 |
Summary: | The transition of Arctic carbon-rich cryosols into methane (CH₄)-emitting wetlands due to global warming is a rising concern. However, the spatially predominant mineral cryosols and their CH₄ emission potential are poorly understood. Fluxes measured in situ and estimated under laboratory conditions coupled with -omics analysis indicate (1) mineral cryosols in the Canadian high Arctic contain atmospheric CH₄-oxidizing bacteria; (2) the atmospheric CH⁺ uptake flux increases with ground temperature; and, as a result, (3) the atmospheric CH₄ sink strength will increase by a factor of 5-30 as the Arctic warms by 5-15 °C over a century. We demonstrated that acidic mineral cryosols have previously unrecognized potential of negative CH₄ feedback. |
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