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DOI | 10.1038/s41561-019-0387-6 |
Direct observation of permafrost degradation and rapid soil carbon loss in tundra | |
Plaza, Cesar1,2,3; Pegoraro, Elaine1; Bracho, Rosvel4,7; Celis, Gerardo1; Crummer, Kathryn G.4,7; Hutchings, Jack A.5,8; Pries, Caitlin E. Hicks4,9; Mauritz, Marguerite1; Natali, Susan M.4,10; Salmon, Verity G.4,11; Schadel, Christina1; Webb, Elizabeth E.4; Schuur, Edward A. G.1,6 | |
2019-08-01 | |
发表期刊 | NATURE GEOSCIENCE |
ISSN | 1752-0894 |
EISSN | 1752-0908 |
出版年 | 2019 |
卷号 | 12期号:8页码:627-+ |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Spain |
英文摘要 | Evidence suggests that 5-15% of the vast pool of soil carbon stored in northern permafrost ecosystems could be emitted as greenhouse gases by 2100 under the current path of global warming. However, direct measurements of changes in soil carbon remain scarce, largely because ground subsidence that occurs as the permafrost soils begin to thaw confounds the traditional quantification of carbon pools based on fixed depths or soil horizons. This issue is overcome when carbon is quantified in relation to a fixed ash content, which uses the relatively stable mineral component of soil as a metric for pool comparisons through time. We applied this approach to directly measure soil carbon pool changes over five years in experimentally warmed and ambient tundra ecosystems at a site in Alaska where permafrost is degrading due to climate change. We show a loss of soil carbon of 5.4% per year (95% confidence interval: 1.0, 9.5) across the site. Our results point to lateral hydrological export as a potential pathway for these surprisingly large losses. This research highlights the potential to make repeat soil carbon pool measurements at sentinel sites across the permafrost region, as this feedback to climate change may be occurring faster than previously thought. |
领域 | 地球科学 ; 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000477864200012 |
WOS关键词 | ARCTIC TUNDRA ; BALANCE ; STOCKS ; ECOSYSTEMS ; EMISSIONS ; THAW ; FLUX |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
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/185815 |
专题 | 地球科学 气候变化 |
作者单位 | 1.No Arizona Univ, Ctr Ecosyst Sci & Soc, Flagstaff, AZ 86011 USA; 2.Univ Rey Juan Carlos, Dept Biol & Geol Fis & Quim Inorgan, Escuela Super Ciencias Expt & Tecnol, Mostoles, Spain; 3.CSIC, Inst Ciencias Agr, Madrid, Spain; 4.Univ Florida, Dept Biol, Gainesville, FL USA; 5.Univ Florida, Dept Geol, Gainesville, FL 32611 USA; 6.No Arizona Univ, Dept Biol Sci, Box 5640Isl, Flagstaff, AZ 86011 USA; 7.Univ Florida, Sch Forest Resources & Conservat, Gainesville, FL 32611 USA; 8.Washington Univ, Dept Earth & Planetary Sci, St Louis, MO 63130 USA; 9.Dartmouth Coll, Dept Biol Sci, Hanover, NH 03755 USA; 10.Woods Hole Res Ctr, Falmouth, MA USA; 11.Oak Ridge Natl Lab, Div Environm Sci, Climate Change Sci Inst, POB 2008, Oak Ridge, TN 37831 USA |
推荐引用方式 GB/T 7714 | Plaza, Cesar,Pegoraro, Elaine,Bracho, Rosvel,et al. Direct observation of permafrost degradation and rapid soil carbon loss in tundra[J]. NATURE GEOSCIENCE,2019,12(8):627-+. |
APA | Plaza, Cesar.,Pegoraro, Elaine.,Bracho, Rosvel.,Celis, Gerardo.,Crummer, Kathryn G..,...&Schuur, Edward A. G..(2019).Direct observation of permafrost degradation and rapid soil carbon loss in tundra.NATURE GEOSCIENCE,12(8),627-+. |
MLA | Plaza, Cesar,et al."Direct observation of permafrost degradation and rapid soil carbon loss in tundra".NATURE GEOSCIENCE 12.8(2019):627-+. |
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