气候变化领域集成服务门户(CCPortal): Linking global terrestrial CO2 fluxes and environmental drivers: Inferences from the Orbiting Carbon Observatory 2 satellite and terrestrial biospheric models

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DOI	10.5194/acp-21-6663-2021
	Linking global terrestrial CO2 fluxes and environmental drivers: Inferences from the Orbiting Carbon Observatory 2 satellite and terrestrial biospheric models
	Chen Z.; Liu J.; Henze D.K.; Huntzinger D.N.; Wells K.C.; Sitch S.; Friedlingstein P.; Joetzjer E.; Bastrikov V.; Goll D.S.; Haverd V.; Jain A.K.; Kato E.; Lienert S.; Lombardozzi D.L.; Mcguire P.C.; Melton J.R.; Nabel J.E.M.S.; Poulter B.; Tian H.; Wiltshire A.J.; Zaehle S.; Miller S.M.
发表日期	2021
ISSN	1680-7316
起始页码	6663
结束页码	6680
卷号	21 期号:9
英文摘要	Observations from the Orbiting Carbon Observatory 2 (OCO-2) satellite have been used to estimate CO2 fluxes in many regions of the globe and provide new insight into the global carbon cycle. The objective of this study is to infer the relationships between patterns in OCO-2 observations and environmental drivers (e.g., temperature, precipitation) and therefore inform a process understanding of carbon fluxes using OCO-2. We use a multiple regression and inverse model, and the regression coefficients quantify the relationships between observations from OCO-2 and environmental driver datasets within individual years for 2015- 2018 and within seven global biomes.We subsequently compare these inferences to the relationships estimated from 15 terrestrial biosphere models (TBMs) that participated in the TRENDY model inter-comparison. Using OCO-2, we are able to quantify only a limited number of relationships between patterns in atmospheric CO2 observations and patterns in environmental driver datasets (i.e., 10 out of the 42 relationships examined). We further find that the ensemble of TBMs exhibits a large spread in the relationships with these key environmental driver datasets. The largest uncertainty in the models is in the relationship with precipitation, particularly in the tropics, with smaller uncertainties for temperature and photosynthetically active radiation (PAR). Using observations from OCO-2, we find that precipitation is associated with increased CO2 uptake in all tropical biomes, a result that agrees with half of the TBMs. By contrast, the relationships that we infer from OCO-2 for temperature and PAR are similar to the ensemble mean of the TBMs, though the results differ from many individual TBMs. These results point to the limitations of current space-based observations for inferring environmental relationships but also indicate the potential to help inform key relationships that are very uncertain in stateof- the-art TBMs. © Author(s) 2021.
语种	英语
scopus关键词	atmospheric chemistry; carbon cycle; carbon dioxide; carbon flux; concentration (composition); regression analysis; satellite imagery
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/246924
作者单位	Department of Environmental Health and Engineering, Johns Hopkins University, Baltimore, MD, United States; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States; Department of Mechanical Engineering, University of Colorado Boulder, Boulder, CO, United States; School of Earth and Sustainability, Northern Arizona University, Flagstaff, AZ, United States; Department of Soil, Water, and Climate, University of Minnesota Twin Cities, St. Paul, MN, United States; College of Life and Environmental Sciences, University of Exeter, Exeter, United Kingdom; College of Engineering, Mathematics and Physical Sciences, University of Exeter, Exeter, United Kingdom; Centre National de Recherche Météorologique, Unité mixte de recherche 3589 Meteo-France, CNRS, 42 Avenue Gaspard Coriolis, Toulouse, 31100, France; Laboratoire des Sciences du Climat et de l'Environnement, Institut Pierre-Simon Laplace, CEA-CNRS-UVSQ, CE Orme des Merisiers, Gif-sur-Yvette CEDEX, 91191, France; Université Par...
推荐引用方式 GB/T 7714	Chen Z.,Liu J.,Henze D.K.,et al. Linking global terrestrial CO2 fluxes and environmental drivers: Inferences from the Orbiting Carbon Observatory 2 satellite and terrestrial biospheric models[J],2021,21(9).
APA	Chen Z..,Liu J..,Henze D.K..,Huntzinger D.N..,Wells K.C..,...&Miller S.M..(2021).Linking global terrestrial CO2 fluxes and environmental drivers: Inferences from the Orbiting Carbon Observatory 2 satellite and terrestrial biospheric models.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(9).
MLA	Chen Z.,et al."Linking global terrestrial CO2 fluxes and environmental drivers: Inferences from the Orbiting Carbon Observatory 2 satellite and terrestrial biospheric models".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.9(2021).