Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1038/NCLIMATE3328 |
Limited contribution of permafrost carbon to methane release from thawing peatlands | |
Cooper, Mark D. A.1; Estop-Aragones, Cristian1,10; Fisher, James P.2; Thierry, Aaron3; Garnett, Mark H.4; Charman, Dan J.1; Murton, Julian B.5; Phoenix, Gareth K.2; Treharne, Rachael2; Kokelj, Steve V.6; Wolfe, Stephen A.7,8; Lewkowicz, Antoni G.9; Williams, Mathew3; Hartley, Iain P.1 | |
2017-07-01 | |
发表期刊 | NATURE CLIMATE CHANGE |
ISSN | 1758-678X |
EISSN | 1758-6798 |
出版年 | 2017 |
卷号 | 7期号:7 |
文章类型 | Article |
语种 | 英语 |
国家 | England; Scotland; Canada |
英文摘要 | Models predict that thaw of permafrost soils at northern high latitudes will release tens of billions of tonnes of carbon (C) to the atmosphere by 2100 (refs 1-3). The effect on the Earth's climate depends strongly on the proportion of this C that is released as the more powerful greenhouse gas methane (CH4), rather than carbon dioxide (CO2) (refs 1,4); even if CH4 emissions represent just 2% of the C release, they would contribute approximately one-quarter of the climate forcing(5). In northern peatlands, thaw of ice-rich permafrost causes surface subsidence (thermokarst) and water-logging(6), exposing substantial stores (tens of kilograms of C per square meter, ref. 7) of previously frozen organic matter to anaerobic conditions, and generating ideal conditions for permafrost-derived CH4 release. Here we show that, contrary to expectations, although substantial CH4 fluxes (>20 g CH4 m(-2) yr(-1)) were recorded from thawing peatlands in northern Canada, only a small amount was derived from previously frozen C (<2 g CH4 m(-2) yr(-1)). Instead, fluxes were driven by anaerobic decomposition of recentCinputs. We conclude that thaw-induced changes in surface wetness and wetland area, rather than the anaerobic decomposition of previously frozen C, may determine the effect of permafrost thaw on CH4 emissions from northern peatlands. |
领域 | 资源环境 |
收录类别 | SCI-E ; SSCI |
WOS记录号 | WOS:000404545400018 |
WOS关键词 | VULNERABILITY ; EMISSIONS ; C-14 |
WOS类目 | Environmental Sciences ; Environmental Studies ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/34204 |
专题 | 资源环境科学 |
作者单位 | 1.Univ Exeter, Coll Life & Environm Sci, Geog, Rennes Dr, Exeter EX4 4RJ, Devon, England; 2.Univ Sheffield, Dept Anim & Plant Sci, Western Bank, Sheffield S10 2TN, S Yorkshire, England; 3.Univ Edinburgh, Sch GeoSci, Edinburgh EH9 3FF, Midlothian, Scotland; 4.NERC Radiocarbon Facil, Scottish Enterprise Technol Pk,Rankine Ave, E Kilbride G75 OQF, Lanark, Scotland; 5.Univ Sussex, Dept Geog, Brighton BN1 9QJ, E Sussex, England; 6.Govt Northwest Terr, Northwest Terr Geol Survey, Yellowknife X1A 2L9, NT, Canada; 7.Carleton Univ, Dept Geog & Environm Studies, Ottawa, ON K1S 5B6, Canada; 8.Nat Resources Canada, Geol Survey Canada, Ottawa, ON K1A 0E8, Canada; 9.Univ Ottawa, Dept Geog Environm & Geomat, Ottawa, ON K1N 6N5, Canada; 10.Univ Alberta, Dept Renewable Resources, Edmonton, AB T6G 2H1, Canada |
推荐引用方式 GB/T 7714 | Cooper, Mark D. A.,Estop-Aragones, Cristian,Fisher, James P.,et al. Limited contribution of permafrost carbon to methane release from thawing peatlands[J]. NATURE CLIMATE CHANGE,2017,7(7). |
APA | Cooper, Mark D. A..,Estop-Aragones, Cristian.,Fisher, James P..,Thierry, Aaron.,Garnett, Mark H..,...&Hartley, Iain P..(2017).Limited contribution of permafrost carbon to methane release from thawing peatlands.NATURE CLIMATE CHANGE,7(7). |
MLA | Cooper, Mark D. A.,et al."Limited contribution of permafrost carbon to methane release from thawing peatlands".NATURE CLIMATE CHANGE 7.7(2017). |
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