气候变化领域集成服务门户(CCPortal): Weakening greenhouse gas sink of pristine wetlands under warming

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DOI	10.1038/s41558-023-01637-0
	Weakening greenhouse gas sink of pristine wetlands under warming
	Bao, Tao; Jia, Gensuo; Xu, Xiyan
发表日期	2023
ISSN	1758-678X
EISSN	1758-6798
起始页码	462
结束页码	+
卷号	13 期号:5
英文摘要	Pristine wetlands have high potential for mitigating climate change because of their large carbon stocks. However, whether and where wetlands will act as a greenhouse gas sink or source under warming is uncertain. Here we report the observations from 167 sites of the responses of carbon dioxide, methane and nitrous oxide emissions to experimental warming in northern wetlands between latitudes 30 degrees N and 80 degrees N during the period 1990-2022. We show that the 100-year global warming potential of wetlands increased by 57% in response to an average temperature increase of 1.5-2.0 degrees C. The difference in dominant plant functional types explains the uncertainties in emissions. Although warming increased the CO2 sink in vascular plant sites, it enhanced the CO2 source in cryptogam-dominated sites. As a net source of CH4 and N2O, the permafrost wetlands dominated by vascular plants positively responded to warming. Our results show that warming undermines the mitigation potential of pristine wetlands even for a limited temperature increase of 1.5-2.0 degrees C, the main goal of the Paris Agreement. Warming reduces the greenhouse gas sink of pristine wetlands. Here the authors show that carbon dioxide emissions increase in cryptogam sites at higher latitudes, while methane and nitrous oxide emissions are enhanced in vascular-plant-dominated permafrost wetlands.
英文关键词	CLIMATE-CHANGE; CARBON-CYCLE; TEMPERATURE MANIPULATION; SOIL RESPIRATION; PERMAFROST; PEATLANDS; CO2; EMISSIONS; METAANALYSIS; RESILIENCE
WOS研究方向	Environmental Sciences ; Environmental Studies ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000953839600003
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/282501
作者单位	Chinese Academy of Sciences; Institute of Atmospheric Physics, CAS
推荐引用方式 GB/T 7714	Bao, Tao,Jia, Gensuo,Xu, Xiyan. Weakening greenhouse gas sink of pristine wetlands under warming[J],2023,13(5).
APA	Bao, Tao,Jia, Gensuo,&Xu, Xiyan.(2023).Weakening greenhouse gas sink of pristine wetlands under warming.Nature Climate Change,13(5).
MLA	Bao, Tao,et al."Weakening greenhouse gas sink of pristine wetlands under warming".Nature Climate Change 13.5(2023).