气候变化领域集成服务门户(CCPortal): Permafrost Carbon: Progress on Understanding Stocks and Fluxes Across Northern Terrestrial Ecosystems

CCPortal

DOI	10.1029/2023JG007638
	Permafrost Carbon: Progress on Understanding Stocks and Fluxes Across Northern Terrestrial Ecosystems
	Treat, Claire C.; Virkkala, Anna-Maria; Burke, Eleanor; Bruhwiler, Lori; Chatterjee, Abhishek; Fisher, Joshua B.; Hashemi, Josh; Parmentier, Frans-Jan W.; Rogers, Brendan M.; Westermann, Sebastian; Watts, Jennifer D.; Blanc-Betes, Elena; Fuchs, Matthias; Kruse, Stefan; Malhotra, Avni; Miner, Kimberley; Strauss, Jens; Armstrong, Amanda; Epstein, Howard E.; Gay, Bradley; Goeckede, Mathias; Kalhori, Aram; Kou, Dan; Miller, Charles E.; Natali, Susan M.; Oh, Youmi; Shakil, Sarah; Sonnentag, Oliver; Varner, Ruth K.; Zolkos, Scott; Schuur, Edward A. G.; Hugelius, Gustaf
发表日期	2024
ISSN	2169-8953
EISSN	2169-8961
起始页码	129
结束页码	3
卷号	129 期号:3
英文摘要	Significant progress in permafrost carbon science made over the past decades include the identification of vast permafrost carbon stocks, the development of new pan-Arctic permafrost maps, an increase in terrestrial measurement sites for CO2 and methane fluxes, and important factors affecting carbon cycling, including vegetation changes, periods of soil freezing and thawing, wildfire, and other disturbance events. Process-based modeling studies now include key elements of permafrost carbon cycling and advances in statistical modeling and inverse modeling enhance understanding of permafrost region C budgets. By combining existing data syntheses and model outputs, the permafrost region is likely a wetland methane source and small terrestrial ecosystem CO2 sink with lower net CO2 uptake toward higher latitudes, excluding wildfire emissions. For 2002-2014, the strongest CO2 sink was located in western Canada (median: -52 g C m-2 y-1) and smallest sinks in Alaska, Canadian tundra, and Siberian tundra (medians: -5 to -9 g C m-2 y-1). Eurasian regions had the largest median wetland methane fluxes (16-18 g CH4 m-2 y-1). Quantifying the regional scale carbon balance remains challenging because of high spatial and temporal variability and relatively low density of observations. More accurate permafrost region carbon fluxes require: (a) the development of better maps characterizing wetlands and dynamics of vegetation and disturbances, including abrupt permafrost thaw; (b) the establishment of new year-round CO2 and methane flux sites in underrepresented areas; and (c) improved models that better represent important permafrost carbon cycle dynamics, including non-growing season emissions and disturbance effects. Climate change and the consequent thawing of permafrost threatens to transform the permafrost region from a carbon sink into a carbon source, posing a challenge to global climate goals. Numerous studies over the past decades have identified important factors affecting carbon cycling, including vegetation changes, periods of soil freezing and thawing, wildfire, and other disturbance events. Overall, studies show high wetland methane emissions and a small net carbon dioxide sink strength over the terrestrial permafrost region but results differ among modeling and upscaling approaches. Continued and coordinated efforts among field, modeling, and remote sensing communities are needed to integrate new knowledge from observations to modeling and predictions and finally to policy. Rapid warming of northern permafrost region threatens ecosystems, soil carbon stocks, and global climate targets Long-term observations show importance of disturbance and cold season periods but are unable to detect spatiotemporal trends in C flux Combined modeling and syntheses show the permafrost region is a small terrestrial CO2 sink with large spatial variability and net CH4 source
英文关键词	permafrost; carbon; tundra; boreal; CO2 flux; methane flux; review; synthesis
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Geology
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary
WOS记录号	WOS:001174974000001
来源期刊	JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/293073
作者单位	Helmholtz Association; Alfred Wegener Institute, Helmholtz Centre for Polar & Marine Research; Stockholm University; Met Office - UK; Hadley Centre; National Aeronautics & Space Administration (NASA); NASA Jet Propulsion Laboratory (JPL); California Institute of Technology; Chapman University System; Chapman University; University of Oslo; University of Oslo; University of Illinois System; University of Illinois Urbana-Champaign; University of Colorado System; University of Colorado Boulder; Helmholtz Association; Alfred Wegener Institute, Helmholtz Centre for Polar & Marine Research; United States Department of Energy (DOE); Pacific Northwest National Laboratory; University System of Maryland; University of Maryland Baltimore County; University of Virginia; Max Planck Society; Helmholtz Association; Helmholtz-Center Potsdam GFZ German Research Center for Geosciences; University of Eastern Finland; University of Colorado System; University of Colorado Boulder; University of Alberta; Uppsala University; Un...
推荐引用方式 GB/T 7714	Treat, Claire C.,Virkkala, Anna-Maria,Burke, Eleanor,et al. Permafrost Carbon: Progress on Understanding Stocks and Fluxes Across Northern Terrestrial Ecosystems[J],2024,129(3).
APA	Treat, Claire C..,Virkkala, Anna-Maria.,Burke, Eleanor.,Bruhwiler, Lori.,Chatterjee, Abhishek.,...&Hugelius, Gustaf.(2024).Permafrost Carbon: Progress on Understanding Stocks and Fluxes Across Northern Terrestrial Ecosystems.JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,129(3).
MLA	Treat, Claire C.,et al."Permafrost Carbon: Progress on Understanding Stocks and Fluxes Across Northern Terrestrial Ecosystems".JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES 129.3(2024).