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Reduced net methane...
Reduced net methane emissions due to microbial methane oxidation in a warmer Arctic
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Oh, Youmi (författare)
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Zhuang, Qianlai (författare)
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Liu, Licheng (författare)
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Welp, Lisa R. (författare)
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Lau, Maggie C. Y. (författare)
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Onstott, Tullis C. (författare)
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Medvigy, David (författare)
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Bruhwiler, Lori (författare)
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Dlugokencky, Edward J. (författare)
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- Hugelius, Gustaf (författare)
- Stockholms universitet,Institutionen för naturgeografi
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D'Imperio, Ludovica (författare)
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Elberling, Bo (författare)
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(creator_code:org_t)
- 2020-03-30
- 2020
- Engelska.
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Ingår i: Nature Climate Change. - : Springer Science and Business Media LLC. - 1758-678X .- 1758-6798. ; 10:4, s. 317-321
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
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- Methane emissions from organic-rich soils in the Arctic have been extensively studied due to their potential to increase the atmospheric methane burden as permafrost thaws(1-3). However, this methane source might have been overestimated without considering high-affinity methanotrophs (HAMs; methane-oxidizing bacteria) recently identified in Arctic mineral soils(4-7). Herein we find that integrating the dynamics of HAMs and methanogens into a biogeochemistry model(8-10) that includes permafrost soil organic carbon dynamics(3) leads to the upland methane sink doubling (similar to 5.5 Tg CH4 yr(-1)) north of 50 degrees N in simulations from 2000-2016. The increase is equivalent to at least half of the difference in net methane emissions estimated between process-based models and observation-based inversions(11,12), and the revised estimates better match site-level and regional observations(5,7,13-15). The new model projects doubled wetland methane emissions between 2017-2100 due to more accessible permafrost carbon(16-18). However, most of the increase in wetland emissions is offset by a concordant increase in the upland sink, leading to only an 18% increase in net methane emission (from 29 to 35 Tg CH4 yr(-1)). The projected net methane emissions may decrease further due to different physiological responses between HAMs and methanogens in response to increasing temperature(19,20).
Ämnesord
- NATURVETENSKAP -- Geovetenskap och miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences (hsv//eng)
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Oh, Youmi
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Zhuang, Qianlai
-
Liu, Licheng
-
Welp, Lisa R.
-
Lau, Maggie C. Y ...
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Onstott, Tullis ...
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visa fler...
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Medvigy, David
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Bruhwiler, Lori
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Dlugokencky, Edw ...
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Hugelius, Gustaf
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D'Imperio, Ludov ...
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Elberling, Bo
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visa färre...
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Stockholms universitet