气候变化领域集成服务门户(CCPortal): Direct observation of permafrost degradation and rapid soil carbon loss in tundra

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DOI	10.1038/s41561-019-0387-6
	Direct observation of permafrost degradation and rapid soil carbon loss in tundra
	Plaza C.; Pegoraro E.; Bracho R.; Celis G.; Crummer K.G.; Hutchings J.A.; Hicks Pries C.E.; Mauritz M.; Natali S.M.; Salmon V.G.; Schädel C.; Webb E.E.; Schuur E.A.G.
发表日期	2019
ISSN	17520894
EISSN	1752-0908
卷号	12 期号:8 页码:627-+
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. © 2019, The Author(s), under exclusive licence to Springer Nature Limited.
学科领域	Geosciences, Multidisciplinary
语种	英语
WOS记录号	WOS:000477864200012
scopus关键词	climate change; degradation; global warming; permafrost; soil carbon; soil horizon; subsidence; tundra soil
来源期刊	Nature Geoscience
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/80958
作者单位	Center for Ecosystem Science and Society, Northern Arizona University, Flagstaff, AZ, United States; Departamento de Biología y Geología, Física y Química Inorgánica, Escuela Superior de Ciencias Experimentales y Tecnología, Universidad Rey Juan Carlos, Móstoles, Spain; Instituto de Ciencias Agrarias, Consejo Superior de Investigaciones Científicas, Madrid, Spain; Department of Biology, University of Florida, Gainesville, FL, United States; Department of Geology, University of Florida, Gainesville, FL, United States; Department of Biological Sciences, Northern Arizona University, Flagstaff, AZ, United States; School of Forest Resources and Conservation, University of Florida, Gainesville, FL, United States; Department of Earth and Planetary Sciences, Washington University, St. Louis, MO, United States; Department of Biological Sciences, Dartmouth College, Hanover, NH, United States; Woods Hole Research Center, Falmouth, MA, United States; Environmental Sciences Division, Climate Change Science Institute, ...
推荐引用方式 GB/T 7714	Plaza C.,Pegoraro E.,Bracho R.,et al. Direct observation of permafrost degradation and rapid soil carbon loss in tundra[J],2019,12(8):627-+.
APA	Plaza C..,Pegoraro E..,Bracho R..,Celis G..,Crummer K.G..,...&Schuur E.A.G..(2019).Direct observation of permafrost degradation and rapid soil carbon loss in tundra.Nature Geoscience,12(8),627-+.
MLA	Plaza C.,et al."Direct observation of permafrost degradation and rapid soil carbon loss in tundra".Nature Geoscience 12.8(2019):627-+.