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Reduced net methane emissions due to microbial methane oxidation in a warmer Arctic

文献类型：期刊论文

作者Oh, Youmi10; Zhuang, Qianlai8,9,10; Liu, Licheng10; Welp, Lisa R.9,10; Lau, Maggie C. Y.1,7; Onstott, Tullis C.7; Medvigy, David6; Bruhwiler, Lori5; Dlugokencky, Edward J.5; Hugelius, Gustaf3,4
刊名NATURE CLIMATE CHANGE
出版日期2020-04-01
卷号10期号:4页码:317-+
ISSN号1758-678X
DOI10.1038/s41558-020-0734-z
英文摘要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).
WOS关键词PERMAFROST CARBON ; ASSIMILATION SYSTEM ; NATURAL WETLANDS ; CLIMATE-CHANGE ; CH4 OXIDATION ; FLUXES ; MODEL ; LANDSCAPE ; CONSUMPTION ; EXCHANGE
资助项目NASA Earth and Space Science Fellowship Program[80NSSC17K0368 P00001] ; NASA Interdisciplinary Research in Earth Science[NNX17AK20G] ; Danish National Research Foundation[CENPERM DNRF100]
WOS研究方向Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
语种英语
出版者NATURE PUBLISHING GROUP
WOS记录号WOS:000522381600001
资助机构NASA Earth and Space Science Fellowship Program ; NASA Interdisciplinary Research in Earth Science ; Danish National Research Foundation
源URL[http://ir.idsse.ac.cn/handle/183446/7539]  
专题深海科学研究部_地外海洋系统研究室
通讯作者Zhuang, Qianlai
作者单位1.Chinese Acad Sci, Inst Deep Sea Sci & Engn, Lab Extraterr Ocean Syst, Sanya, Peoples R China
2.Univ Copenhagen, Ctr Permafrost CENPERM, Copenhagen, Denmark
3.Stockholm Univ, Bolin Ctr Climate Res, Stockholm, Sweden
4.Stockholm Univ, Dept Phys Geog, Stockholm, Sweden
5.NOAA, Earth Syst Res Lab, Global Monitoring Div, Boulder, CO USA
6.Univ Notre Dame, Dept Biol Sci, Notre Dame, IN 46556 USA
7.Princeton Univ, Dept Geosci, Princeton, NJ 08544 USA
8.Purdue Univ, Dept Agron, W Lafayette, IN 47907 USA
9.Purdue Climate Change Res Ctr, W Lafayette, IN 47907 USA
10.Purdue Univ, Dept Earth Atmospher & Planetary Sci, W Lafayette, IN 47907 USA
推荐引用方式
GB/T 7714		 Oh, Youmi,Zhuang, Qianlai,Liu, Licheng,et al. Reduced net methane emissions due to microbial methane oxidation in a warmer Arctic[J]. NATURE CLIMATE CHANGE,2020,10(4):317-+.
APA Oh, Youmi.,Zhuang, Qianlai.,Liu, Licheng.,Welp, Lisa R..,Lau, Maggie C. Y..,...&Elberling, Bo.(2020).Reduced net methane emissions due to microbial methane oxidation in a warmer Arctic.NATURE CLIMATE CHANGE,10(4),317-+.
MLA Oh, Youmi,et al."Reduced net methane emissions due to microbial methane oxidation in a warmer Arctic".NATURE CLIMATE CHANGE 10.4(2020):317-+.

入库方式： OAI收割

来源：深海科学与工程研究所

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