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, Yu; Liao, Hong; Tian, Xiangjun; Gao, Hao; Jia, Binghao; Han, Rui
通讯作者	Liao, H (通讯作者)
发表日期	2021
ISSN	2169-897X
EISSN	2169-8996
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.
关键词	MODEL INTERCOMPARISON PROJECT PROGRAM MULTISCALE SYNTHESIS DATA ASSIMILATION SYSTEM TRANSPORT MODEL SATELLITE-OBSERVATIONS AVIATION EMISSIONS SINKS CLIMATE EXCHANGE DIOXIDE
英文关键词	terrestrial flux; carbon dioxide; simulations; uncertainties
语种	英语
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
WOS记录号	WOS:000702399300011
来源期刊	JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/260385
推荐引用方式 GB/T 7714	Fu, Yu,Liao, Hong,Tian, Xiangjun,et al. Impact of Prior Terrestrial Carbon Fluxes on Simulations of Atmospheric CO2 Concentrations[J]. 中国科学院青藏高原研究所,2021,126(18).
APA	Fu, Yu,Liao, Hong,Tian, Xiangjun,Gao, Hao,Jia, Binghao,&Han, Rui.(2021).Impact of Prior Terrestrial Carbon Fluxes on Simulations of Atmospheric CO2 Concentrations.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,126(18).
MLA	Fu, Yu,et al."Impact of Prior Terrestrial Carbon Fluxes on Simulations of Atmospheric CO2 Concentrations".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 126.18(2021).