干旱区生态环境知识资源中心(Arid): Spatial biases reduce the ability of Earth system models to simulate soil heterotrophic respiration fluxes

Arid

DOI	10.5194/bg-21-657-2024
	Spatial biases reduce the ability of Earth system models to simulate soil heterotrophic respiration fluxes
	Guenet, Bertrand; Orliac, Jeremie; Cecillon, Lauric; Torres, Olivier; Sereni, Laura; Martin, Philip A.; Barre, Pierre; Bopp, Laurent
通讯作者	Guenet, B
来源期刊	BIOGEOSCIENCES
ISSN	1726-4170
EISSN	1726-4189
出版年	2024
卷号	21 期号:2 页码:657-669
英文摘要	Heterotrophic respiration (Rh) is, at a global scale, one of the largest CO2 fluxes between the Earth's surface and atmosphere and may increase in the future. The previous generation of Earth system models (ESMs) was able to reproduce global fluxes relatively well, but at that, time no gridded products were available to perform an in-depth evaluation. The capacity of the new generation of ESMs used within the Coupled Model Intercomparison Project Phase 6 (CMIP6) to reproduce this flux has not been evaluated, meaning that the realism of resulting CO2 flux estimates is unclear. In this study, we combine recently released observational data on Rh and ESM simulations to evaluate the ability of 13 ESMs from CMIP6 to reproduce Rh. Only 4 of the 13 tested ESMs were able to reproduce the total Rh flux, but spatial analysis underlined important bias compensation for most of the ESMs, which generally showed an overestimation in tropical regions and an underestimation in arid regions. To identify the main drivers of the bias, we performed an analysis of the residuals and found that mean annual precipitation was the most important driver explaining the difference between ESM simulations and observation-derived products of Rh, with a higher bias between ESM simulations and Rh products where precipitation was high. Based on our results, next-generation ESMs should focus on improving the response of Rh to soil moisture.
类型	Article
语种	英语
开放获取类型	Green Submitted, gold
收录类别	SCI-E
WOS记录号	WOS:001189314500001
WOS关键词	CARBON-USE EFFICIENCY ; TEMPERATURE SENSITIVITY ; ECOSYSTEM MODEL ; CLIMATE ; STOICHIOMETRY ; DECOMPOSITION ; GROSS
WOS类目	Ecology ; Geosciences, Multidisciplinary
WOS研究方向	Environmental Sciences & Ecology ; Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/403012
推荐引用方式 GB/T 7714	Guenet, Bertrand,Orliac, Jeremie,Cecillon, Lauric,et al. Spatial biases reduce the ability of Earth system models to simulate soil heterotrophic respiration fluxes[J],2024,21(2):657-669.
APA	Guenet, Bertrand.,Orliac, Jeremie.,Cecillon, Lauric.,Torres, Olivier.,Sereni, Laura.,...&Bopp, Laurent.(2024).Spatial biases reduce the ability of Earth system models to simulate soil heterotrophic respiration fluxes.BIOGEOSCIENCES,21(2),657-669.
MLA	Guenet, Bertrand,et al."Spatial biases reduce the ability of Earth system models to simulate soil heterotrophic respiration fluxes".BIOGEOSCIENCES 21.2(2024):657-669.