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Increased CO2 emissions surpass reductions of non-CO2 emissions more under higher experimental warming in an alpine meadow
Wang, Jinsong1,2,3; Quan, Quan1,4; Chen, Weinan1,4; Tian, Dashuan1; Ciais, Philippe5; Crowther, Thomas W.6; Mack, Michelle C.2,3; Poulter, Benjamin7; Tian, Hanqin8; Luo, Yiqi2,3; Wen, Xuefa1,4; Yu, Guirui1,4; Niu, Shuli1,4
2021-05-15
Source PublicationSCIENCE OF THE TOTAL ENVIRONMENT
ISSN0048-9697
Volume769Pages:11
Corresponding AuthorNiu, Shuli(sniu@igsnrr.ac.cn)
AbstractIt 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.
KeywordCO2 emissions Cold ecosystem Greenhouse gas balance Non-growing season Warming magnitude
DOI10.1016/j.scitotenv.2020.144559
Indexed BySCI
Language英语
Funding ProjectNational 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]
Funding OrganizationNational Natural Science Foundation of China ; Second Tibetan Plateau Scientific Expedition and Research (STEP) program ; International Postdoctoral Exchange Fellowship Program
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
WOS IDWOS:000626618100043
PublisherELSEVIER
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/161859
Collection中国科学院地理科学与资源研究所
Corresponding AuthorNiu, Shuli
Affiliation1.Chinese Acad Sci, Key Lab Ecosyst Network Observat & Modeling, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China
2.No Arizona Univ, Ctr Ecosyst Sci & Soc, Flagstaff, AZ 86011 USA
3.No Arizona Univ, Dept Biol Sci, Flagstaff, AZ 86011 USA
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.NASA, Goddard Space Flight Ctr, Code 916, Greenbelt, MD 20771 USA
8.Auburn Univ, Int Ctr Climate & Global Change Res, Sch Forestry & Wildlife Sci, Auburn, AL 36849 USA
Recommended Citation
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.
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