气候变化领域集成服务门户(CCPortal): Improved Constraints on Northern Extratropical CO2 Fluxes Obtained by Combining Surface-Based and Space-Based Atmospheric CO2 Measurements

CCPortal

DOI	10.1029/2019JD032029
	Improved Constraints on Northern Extratropical CO2 Fluxes Obtained by Combining Surface-Based and Space-Based Atmospheric CO2 Measurements
	Byrne B.; Liu J.; Lee M.; Baker I.; Bowman K.W.; Deutscher N.M.; Feist D.G.; Griffith D.W.T.; Iraci L.T.; Kiel M.; Kimball J.S.; Miller C.E.; Morino I.; Parazoo N.C.; Petri C.; Roehl C.M.; Sha M.K.; Strong K.; Velazco V.A.; Wennberg P.O.; Wunch D.
发表日期	2020
ISSN	2169897X
卷号	125 期号:15
英文摘要	Top-down estimates of CO2 fluxes are typically constrained by either surface-based or space-based CO2 observations. Both of these measurement types have spatial and temporal gaps in observational coverage that can lead to differences in inferred fluxes. Assimilating both surface-based and space-based measurements concurrently in a flux inversion framework improves observational coverage and reduces sampling related artifacts. This study examines the consistency of flux constraints provided by these different observations and the potential to combine them by performing a series of 6-year (2010–2015) CO2 flux inversions. Flux inversions are performed assimilating surface-based measurements from the in situ and flask network, measurements from the Total Carbon Column Observing Network (TCCON), and space-based measurements from the Greenhouse Gases Observing Satellite (GOSAT), or all three data sets combined. Combining the data sets results in more precise flux estimates for subcontinental regions relative to any of the data sets alone. Combining the data sets also improves the accuracy of the posterior fluxes, based on reduced root-mean-square differences between posterior flux-simulated CO2 and aircraft-based CO2 over midlatitude regions (0.33–0.56 ppm) in comparison to GOSAT (0.37–0.61 ppm), TCCON (0.50–0.68 ppm), or in situ and flask measurements (0.46–0.56 ppm) alone. These results suggest that surface-based and GOSAT measurements give complementary constraints on CO2 fluxes in the northern extratropics and can be combined in flux inversions to improve constraints on regional fluxes. This stands in contrast with many earlier attempts to combine these data sets and suggests that improvements in the NASA Atmospheric CO2 Observations from Space (ACOS) retrieval algorithm have significantly improved the consistency of space-based and surface-based flux constraints. © 2020. The Authors.
英文关键词	carbon cycle; CO2 flux; data assimilation; GOSAT; OCO-2; TCCON
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/185871
作者单位	Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States; Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA, United States; Atmospheric Science Department, Colorado State University, Fort Collins, CO, United States; Centre for Atmospheric Chemistry, School of Earth, Atmospheric and Life Sciences, University of Wollongong, Wollongong, NSW, Australia; Max Planck Institute for Biogeochemistry, Jena, Germany; Lehrstuhl für Physik der Atmosphäre, Ludwig-Maximilians-Universität München, Munich, Germany; Institut für Physik der Atmosphäre, Deutsches Zentrum für Luft- und Raumfahrt, Oberpfaffenhofen, Weßling, Germany; Atmospheric Science Branch, NASA Ames Research Center, Moffett Field, CA, United States; Numerical Terradynamic Simulation Group, W.A. Franke College of Forestry & Conservation, The University of Montana, Missoula, MT, United States; Satellite Observation Center, Center for Global Environmental Research, National Institu...
推荐引用方式 GB/T 7714	Byrne B.,Liu J.,Lee M.,et al. Improved Constraints on Northern Extratropical CO2 Fluxes Obtained by Combining Surface-Based and Space-Based Atmospheric CO2 Measurements[J],2020,125(15).
APA	Byrne B..,Liu J..,Lee M..,Baker I..,Bowman K.W..,...&Wunch D..(2020).Improved Constraints on Northern Extratropical CO2 Fluxes Obtained by Combining Surface-Based and Space-Based Atmospheric CO2 Measurements.Journal of Geophysical Research: Atmospheres,125(15).
MLA	Byrne B.,et al."Improved Constraints on Northern Extratropical CO2 Fluxes Obtained by Combining Surface-Based and Space-Based Atmospheric CO2 Measurements".Journal of Geophysical Research: Atmospheres 125.15(2020).