气候变化领域集成服务门户(CCPortal): COS-derived GPP relationships with temperature and light help explain high-latitude atmospheric CO2 seasonal cycle amplification

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DOI	10.1073/pnas.2103423118
	COS-derived GPP relationships with temperature and light help explain high-latitude atmospheric CO2 seasonal cycle amplification
	Hu L.; Montzka S.A.; Kaushik A.; Andrews A.E.; Sweeney C.; Miller J.; Baker I.T.; Denning S.; Campbell E.; Shiga Y.P.; Tans P.; Siso M.C.; Crotwell M.; McKain K.; Thoning K.; Hall B.; Vimont I.; Elkins J.W.; Whelan M.E.; Suntharalingam P.
发表日期	2021
ISSN	0027-8424
卷号	118 期号:33
英文摘要	In the Arctic and Boreal region (ABR) where warming is especially pronounced, the increase of gross primary production (GPP) has been suggested as an important driver for the increase of the atmospheric CO2 seasonal cycle amplitude (SCA). However, the role of GPP relative to changes in ecosystem respiration (ER) remains unclear, largely due to our inability to quantify these gross fluxes on regional scales. Here, we use atmospheric carbonyl sulfide (COS) measurements to provide observation-based estimates of GPP over the North American ABR. Our annual GPP estimate is 3.6 (2.4 to 5.5) PgC · y−1 between 2009 and 2013, the uncertainty of which is smaller than the range of GPP estimated from terrestrial ecosystem models (1.5 to 9.8 PgC · y−1). Our COS-derived monthly GPP shows significant correlations in space and time with satellite-based GPP proxies, solar-induced chlorophyll fluorescence, and near-infrared reflectance of vegetation. Furthermore, the derived monthly GPP displays two different linear relationships with soil temperature in spring versus autumn, whereas the relationship between monthly ER and soil temperature is best described by a single quadratic relationship throughout the year. In spring to midsummer, when GPP is most strongly correlated with soil temperature, our results suggest the warming-induced increases of GPP likely exceeded the increases of ER over the past four decades. In autumn, however, increases of ER were likely greater than GPP due to light limitations on GPP, thereby enhancing autumn net carbon emissions. Both effects have likely contributed to the atmospheric CO2 SCA amplification observed in the ABR. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	Arctic and Boreal ecosystems; Carbonyl sulfide; Climate change; CO2 seasonal cycle amplitude; Gross primary production
语种	英语
scopus关键词	carbonyl sulfide; sulfide; unclassified drug; Article; autumn; carbon footprint; chlorophyll fluorescence; climate change; controlled study; correlation analysis; ecosystem; gene amplification; latitude; light; near infrared reflectance spectroscopy; North American; primary production (biomass); seasonal variation; soil temperature; space; spring; summer; terrestrial species; time; vegetation; warming
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/238432
作者单位	Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, CO 80309, United States; Global Monitoring Laboratory, National Oceanic and Atmospheric Administration, Boulder, CO 80305, United States; Department of Atmospheric Science, Colorado State University, Fort Collins, CO 80523, United States; Environmental Studies Department, University of California, Santa Cruz, CA 95064, United States; Earth Science, Universities Space Research Association, Mountain View, CA 94043, United States; Department of Environmental Sciences, Rutgers University, New Brunswick, NJ 08901, United States; School of Environmental Sciences, University of East Anglia, Norwich, NR4 7TJ, United Kingdom
推荐引用方式 GB/T 7714	Hu L.,Montzka S.A.,Kaushik A.,et al. COS-derived GPP relationships with temperature and light help explain high-latitude atmospheric CO2 seasonal cycle amplification[J],2021,118(33).
APA	Hu L..,Montzka S.A..,Kaushik A..,Andrews A.E..,Sweeney C..,...&Suntharalingam P..(2021).COS-derived GPP relationships with temperature and light help explain high-latitude atmospheric CO2 seasonal cycle amplification.Proceedings of the National Academy of Sciences of the United States of America,118(33).
MLA	Hu L.,et al."COS-derived GPP relationships with temperature and light help explain high-latitude atmospheric CO2 seasonal cycle amplification".Proceedings of the National Academy of Sciences of the United States of America 118.33(2021).