气候变化领域集成服务门户(CCPortal): Impact of Prior Terrestrial Carbon Fluxes on Simulations of Atmospheric CO2 Concentrations

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DOI	10.1029/2021JD034794
	Impact of Prior Terrestrial Carbon Fluxes on Simulations of Atmospheric CO2 Concentrations
	Fu Y.; Liao H.; Tian X.; Gao H.; Jia B.; Han R.
发表日期	2021
ISSN	2169-897X
卷号	126 期号:18
英文摘要	Terrestrial ecosystems have a significant role in shaping the distribution of atmospheric CO2, but it is uncertain how much they affect CO2 concentrations. We assessed the impact of terrestrial fluxes derived from different biosphere models in the Multi-scale Synthesis and Terrestrial Model Intercomparison Project (MsTMIP) on atmospheric CO2 estimations based on a global chemical transport model (GEOS-Chem) when these fluxes were applied as prior information. We examined the spatiotemporal uncertainty in terrestrial flux estimations from 15 MsTMIP terrestrial fluxes. We found high uncertainties in the terrestrial fluxes for temperate North America, tropical and temperate South America, southern Africa, Europe and tropical Asia. Sensitivity simulations showed that the annual mean CO2 concentration changed by 6.0–8.0 ppmv with the spread of the terrestrial fluxes. The interannual trend in the terrestrial fluxes could significantly affect the simulated trend of atmospheric CO2 concentrations. As a result of the spread in the prior terrestrial fluxes, large differences in the daily mean CO2 anomalies changed with an interquartile range of −1.0 to +1.0 ppmv and the magnitude of change in the sub-daily CO2 concentrations was in the range 4.0–6.0 ppmv for China, the USA and Europe. Our results suggest an urgent need to increase the reliability of terrestrial flux estimates in CO2 simulations. Surface seasonal CO2 concentrations were simulated to change by ±2.0 ppmv in most regions of the world due to the differences in the ensemble mean fluxes, reflecting the impact of the uncertainties in the existing optimized terrestrial fluxes on CO2 simulations. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	carbon dioxide; simulations; terrestrial flux; uncertainties
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/237006
作者单位	Climate Neutrality Research Center, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, School of Environmental Science and Engineering, Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Jiangsu Nanjing University of Information Science and Technology, Nanjing, China; Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, China; National Satellite Meteorological Center, China Meteorological Administration, Beijing, China; State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; International Center for Climate and Environment Sciences, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; Now at Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural S...
推荐引用方式 GB/T 7714	Fu Y.,Liao H.,Tian X.,et al. Impact of Prior Terrestrial Carbon Fluxes on Simulations of Atmospheric CO2 Concentrations[J],2021,126(18).
APA	Fu Y.,Liao H.,Tian X.,Gao H.,Jia B.,&Han R..(2021).Impact of Prior Terrestrial Carbon Fluxes on Simulations of Atmospheric CO2 Concentrations.Journal of Geophysical Research: Atmospheres,126(18).
MLA	Fu Y.,et al."Impact of Prior Terrestrial Carbon Fluxes on Simulations of Atmospheric CO2 Concentrations".Journal of Geophysical Research: Atmospheres 126.18(2021).