气候变化领域集成服务门户(CCPortal): Arctic soil methane sink increases with drier conditions and higher ecosystem respiration

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DOI	10.1038/s41558-023-01785-3
	Arctic soil methane sink increases with drier conditions and higher ecosystem respiration
	Voigt, Carolina; Virkkala, Anna-Maria; Hould Gosselin, Gabriel; Bennett, Kathryn A.; Black, T. Andrew; Detto, Matteo; Chevrier-Dion, Charles; Guggenberger, Georg; Hashmi, Wasi; Kohl, Lukas; Kou, Dan; Marquis, Charlotte; Marsh, Philip; Marushchak, Maija E.; Nesic, Zoran; Nykaenen, Hannu; Saarela, Taija; Sauheitl, Leopold; Walker, Branden; Weiss, Niels; Wilcox, Evan J.; Sonnentag, Oliver
发表日期	2023
ISSN	1758-678X
EISSN	1758-6798
卷号	13 期号:10
英文摘要	Arctic wetlands are known methane (CH4) emitters but recent studies suggest that the Arctic CH4 sink strength may be underestimated. Here we explore the capacity of well-drained Arctic soils to consume atmospheric CH4 using >40,000 hourly flux observations and spatially distributed flux measurements from 4 sites and 14 surface types. While consumption of atmospheric CH4 occurred at all sites at rates of 0.092 & PLUSMN; 0.011 mgCH4 m-2 h-1 (mean & PLUSMN; s.e.), CH4 uptake displayed distinct diel and seasonal patterns reflecting ecosystem respiration. Combining in situ flux data with laboratory investigations and a machine learning approach, we find biotic drivers to be highly important. Soil moisture outweighed temperature as an abiotic control and higher CH4 uptake was linked to increased availability of labile carbon. Our findings imply that soil drying and enhanced nutrient supply will promote CH4 uptake by Arctic soils, providing a negative feedback to global climate change. The Arctic is estimated to be a source of atmospheric methane but the sink capacity may be underestimated. This study shows that methane uptake in well-drained Arctic soils is driven by soil moisture and carbon availability, indicating a potential increased methane sink under climate change.
英文关键词	ATMOSPHERIC METHANE; STATIC CHAMBERS; ORGANIC-MATTER; CH4 FLUXES; OXIDATION; CONSUMPTION; CO2; EXCHANGE; BOREAL; CARBON
WOS研究方向	Environmental Sciences ; Environmental Studies ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:001065546000001
来源期刊	Nature Climate Change
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/282334
作者单位	University of Eastern Finland; Universite de Montreal; University of Hamburg; Wilfrid Laurier University; University of British Columbia; Princeton University; Leibniz University Hannover; University of Jyvaskyla
推荐引用方式 GB/T 7714	Voigt, Carolina,Virkkala, Anna-Maria,Hould Gosselin, Gabriel,et al. Arctic soil methane sink increases with drier conditions and higher ecosystem respiration[J],2023,13(10).
APA	Voigt, Carolina.,Virkkala, Anna-Maria.,Hould Gosselin, Gabriel.,Bennett, Kathryn A..,Black, T. Andrew.,...&Sonnentag, Oliver.(2023).Arctic soil methane sink increases with drier conditions and higher ecosystem respiration.Nature Climate Change,13(10).
MLA	Voigt, Carolina,et al."Arctic soil methane sink increases with drier conditions and higher ecosystem respiration".Nature Climate Change 13.10(2023).