Invert global and China's terrestrial carbon fluxes over 2019-2021 based on assimilating richer atmospheric CO 2 observations.

Autor: Li J; Monitoring and Assessment Center for GHGs and Carbon Neutrality, State Key Laboratory of Severe Weather of CMA, Chinese Academy of Meteorological Sciences, Beijing 100081, China; University of Chinese Academy of Sciences, Beijing 100049, China. Electronic address: lijylakey@163.com., Zhang X; Monitoring and Assessment Center for GHGs and Carbon Neutrality, State Key Laboratory of Severe Weather of CMA, Chinese Academy of Meteorological Sciences, Beijing 100081, China; Joint Laboratory of Climate Change Mitigation and Carbon Neutrality of Henan Univ. & CAMS, Henan 475001, China. Electronic address: xiaoye@cma.gov.cn., Guo L; Monitoring and Assessment Center for GHGs and Carbon Neutrality, State Key Laboratory of Severe Weather of CMA, Chinese Academy of Meteorological Sciences, Beijing 100081, China; Joint Laboratory of Climate Change Mitigation and Carbon Neutrality of Henan Univ. & CAMS, Henan 475001, China. Electronic address: guolf@cma.gov.cn., Zhong J; Monitoring and Assessment Center for GHGs and Carbon Neutrality, State Key Laboratory of Severe Weather of CMA, Chinese Academy of Meteorological Sciences, Beijing 100081, China; Joint Laboratory of Climate Change Mitigation and Carbon Neutrality of Henan Univ. & CAMS, Henan 475001, China. Electronic address: zhongjt@cma.gov.cn., Wang D; Monitoring and Assessment Center for GHGs and Carbon Neutrality, State Key Laboratory of Severe Weather of CMA, Chinese Academy of Meteorological Sciences, Beijing 100081, China; Joint Laboratory of Climate Change Mitigation and Carbon Neutrality of Henan Univ. & CAMS, Henan 475001, China. Electronic address: wangdeying@cma.gov.cn., Wu C; Monitoring and Assessment Center for GHGs and Carbon Neutrality, State Key Laboratory of Severe Weather of CMA, Chinese Academy of Meteorological Sciences, Beijing 100081, China. Electronic address: wucy630114186@163.com., Li F; China Global Atmosphere Watch Baseline Observatory, Xining 810000, China. Electronic address: 7177910@qq.com., Li M; China Global Atmosphere Watch Baseline Observatory, Xining 810000, China. Electronic address: 798168010@qq.com.
Jazyk: angličtina
Zdroj: The Science of the total environment [Sci Total Environ] 2024 Jun 15; Vol. 929, pp. 172320. Date of Electronic Publication: 2024 Apr 16.
DOI: 10.1016/j.scitotenv.2024.172320
Abstrakt: With China's commitment to reach carbon peak by 2030 and achieve carbon neutrality by 2060, it is particularly important to obtain terrestrial ecosystem carbon fluxes with low uncertainty both globally and in China. The use of more observation data may help reduce the uncertainty of inverting carbon fluxes. This study uses the observation data from global stations, background stations and provincial stations in China, as well as the OCO-2 satellite, and uses the China Carbon Monitoring, Verification and Supporting System for Global (CCMVS-G) to estimate the carbon fluxes of global and Chinese terrestrial ecosystems from 2019 to 2021. The results revealed that the global terrestrial ecosystem carbon sink was approximately -3.40 Pg C/yr from 2019 to 2021. The carbon sinks in the Northern Hemisphere are large, especially in Asia, North America, and Europe. From 2019 to 2021, the carbon sink of China's terrestrial ecosystem was approximately -0.44 Pg C/yr. Carbon sinks exhibit significant seasonal and interannual variations in China. After assimilating the observation data, the uncertainty of the posterior flux is smaller than that of the prior flux, a more reasonable distribution of carbon sources and sinks can be obtained, and more accurate boundary conditions can be provided for the China Carbon Monitoring, Verification and Supporting System for Regional (CCMVS-R). In the future, it is important to establish a well-designed CO 2 ground-based observation network.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024. Published by Elsevier B.V.)
Databáze: MEDLINE
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