Increased CO2 emissions surpass reductions of non-CO2 emissions more under higher experimental warming in an alpine meadow

doi:10.1016/j.scitotenv.2020.144559

	Increased CO2 emissions surpass reductions of non-CO2 emissions more under higher experimental warming in an alpine meadow
	Wang, Jinsong 2,3,7; Quan, Quan 3,4; Chen, Weinan 3,4; Tian, Dashuan 3; Ciais, Philippe 5; Crowther, Thomas W.6; Mack, Michelle C.2,7; Poulter, Benjamin 1; Tian, Hanqin 8; Luo, Yiqi 2,7
刊名	SCIENCE OF THE TOTAL ENVIRONMENT
	2021-05-15
卷号	769 页码:11
关键词	CO2 emissions Cold ecosystem Greenhouse gas balance Non-growing season Warming magnitude
ISSN号	0048-9697
DOI	10.1016/j.scitotenv.2020.144559
通讯作者	Niu, Shuli(sniu@igsnrr.ac.cn)
英文摘要	It is well documented that warming can accelerate greenhouse gas (GHG) emissions, further inducing a positive feedback and reinforcing future climate warming. However, how different kinds of GHGs respond to various warming magnitudes remains largely unclear, especially in the cold regions that are more sensitive to climate warming. Here, we concurrently measured carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O) fluxes and their total balance in an alpine meadow in response to three levels of warming (ambient, +1.5 degrees C, +3.0 degrees C). We found warming-induced increases in CH4 uptake, decreases in N2O emissions and increases in CO2 emissions at the annual basis. Expressed as CO2-equivalents with a global warming potential of 100 years (GWP100), the enhancement of CH4 uptake and reduction of N2O emissions offset only 9% of the warming-induced increase in CO2 emissions for 15 degrees C warming, and only 7% for 3.0 degrees C warming. CO2 emissions were strongly stimulated, leading to a significantly positive feedback to climate system, for 3.0 degrees C warming but less for 1.5 degrees C warming. The warming with 3.0 degrees C altered the total GHG balance mainly by stimulating CO2 emissions in the non-growing season due to warmer soil temperatures, longer unfrozen period, and increased soil water content. The findings provide an empirical evidence that warming beyond global 2 degrees C target can trigger a positive GHG-climate feedback and highlight the contribution from non-growing season to this positive feedback loop in cold ecosystems. (C) 2021 Elsevier B.V. All rights reserved.
资助项目	National Natural Science Foundation of China[31988102] ; National Natural Science Foundation of China[31625006] ; National Natural Science Foundation of China[31800404] ; Second Tibetan Plateau Scientific Expedition and Research (STEP) program[2019QZKK0302] ; International Postdoctoral Exchange Fellowship Program[20180005]
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000626618100043
资助机构	National Natural Science Foundation of China ; Second Tibetan Plateau Scientific Expedition and Research (STEP) program ; International Postdoctoral Exchange Fellowship Program
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/161858]
专题	中国科学院地理科学与资源研究所
通讯作者	Niu, Shuli
作者单位	1.NASA, Goddard Space Flight Ctr, Code 916, Greenbelt, MD 20771 USA 2.No Arizona Univ, Dept Biol Sci, Flagstaff, AZ 86011 USA 3.Chinese Acad Sci, Key Lab Ecosyst Network Observat & Modeling, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China 4.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China 5.UVSQ, Lab Sci Climat & Environm LSCE, CEA, CNRS, F-91191 Gif Sur Yvette, France 6.Swiss Fed Inst Technol, Dept Environm Syst Sci, Inst Integrat Biol, CH-8092 Zurich, Switzerland 7.No Arizona Univ, Ctr Ecosyst Sci & Soc, Flagstaff, AZ 86011 USA 8.Auburn Univ, Int Ctr Climate & Global Change Res, Sch Forestry & Wildlife Sci, Auburn, AL 36849 USA
推荐引用方式 GB/T 7714	Wang, Jinsong,Quan, Quan,Chen, Weinan,et al. Increased CO2 emissions surpass reductions of non-CO2 emissions more under higher experimental warming in an alpine meadow[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2021,769:11.
APA	Wang, Jinsong.,Quan, Quan.,Chen, Weinan.,Tian, Dashuan.,Ciais, Philippe.,...&Niu, Shuli.(2021).Increased CO2 emissions surpass reductions of non-CO2 emissions more under higher experimental warming in an alpine meadow.SCIENCE OF THE TOTAL ENVIRONMENT,769,11.
MLA	Wang, Jinsong,et al."Increased CO2 emissions surpass reductions of non-CO2 emissions more under higher experimental warming in an alpine meadow".SCIENCE OF THE TOTAL ENVIRONMENT 769(2021):11.