气候变化领域集成服务门户(CCPortal): Carbon release through abrupt permafrost thaw

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DOI	10.1038/s41561-019-0526-0
	Carbon release through abrupt permafrost thaw
	Turetsky M.R.; Abbott B.W.; Jones M.C.; Anthony K.W.; Olefeldt D.; Schuur E.A.G.; Grosse G.; Kuhry P.; Hugelius G.; Koven C.; Lawrence D.M.; Gibson C.; Sannel A.B.K.; McGuire A.D.
发表日期	2020
ISSN	17520894
卷号	13 期号:2
英文摘要	The permafrost zone is expected to be a substantial carbon source to the atmosphere, yet large-scale models currently only simulate gradual changes in seasonally thawed soil. Abrupt thaw will probably occur in <20% of the permafrost zone but could affect half of permafrost carbon through collapsing ground, rapid erosion and landslides. Here, we synthesize the best available information and develop inventory models to simulate abrupt thaw impacts on permafrost carbon balance. Emissions across 2.5 million km2 of abrupt thaw could provide a similar climate feedback as gradual thaw emissions from the entire 18 million km2 permafrost region under the warming projection of Representative Concentration Pathway 8.5. While models forecast that gradual thaw may lead to net ecosystem carbon uptake under projections of Representative Concentration Pathway 4.5, abrupt thaw emissions are likely to offset this potential carbon sink. Active hillslope erosional features will occupy 3% of abrupt thaw terrain by 2300 but emit one-third of abrupt thaw carbon losses. Thaw lakes and wetlands are methane hot spots but their carbon release is partially offset by slowly regrowing vegetation. After considering abrupt thaw stabilization, lake drainage and soil carbon uptake by vegetation regrowth, we conclude that models considering only gradual permafrost thaw are substantially underestimating carbon emissions from thawing permafrost. © 2020, The Author(s), under exclusive licence to Springer Nature Limited.
语种	英语
scopus关键词	carbon; carbon balance; carbon sink; climate feedback; collapse structure; environmental modeling; freeze-thaw cycle; landslide; permafrost; soil emission; thawing
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/124505
作者单位	Department of Integrative Biology, University of Guelph, Guelph, ON, Canada; Institute of Arctic and Alpine Research (INSTAAR), University of Colorado Boulder, Boulder, CO, United States; Department of Plant and Wildlife Sciences, Brigham Young University, Provo, UT, United States; United States Geological Survey, Reston, VA, United States; Water and Environmental Research Center, University of Alaska, Fairbanks, AK, United States; Department of Renewable Resources, University of Alberta, Edmonton, AB, Canada; Center for Ecosystem Science and Society and Department of Biological Sciences, Northern Arizona University, Flagstaff, AZ, United States; Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Potsdam, Germany; Institute of Geosciences, University of Potsdam, Potsdam, Germany; Department of Physical Geography, Stockholm University, Stockholm, Sweden; Bolin Centre for Climate Research, Stockholm University, Stockholm, Sweden; Climate and Ecosystem Sciences Division, Lawrence Berkel...
推荐引用方式 GB/T 7714	Turetsky M.R.,Abbott B.W.,Jones M.C.,et al. Carbon release through abrupt permafrost thaw[J],2020,13(2).
APA	Turetsky M.R..,Abbott B.W..,Jones M.C..,Anthony K.W..,Olefeldt D..,...&McGuire A.D..(2020).Carbon release through abrupt permafrost thaw.Nature Geoscience,13(2).
MLA	Turetsky M.R.,et al."Carbon release through abrupt permafrost thaw".Nature Geoscience 13.2(2020).