干旱区生态环境知识资源中心(Arid): CO2 fertilization is spatially distinct from stomatal conductance reduction in controlling ecosystem water-use efficiency increase

Arid

DOI	10.1088/1748-9326/ac6c9c
	CO2 fertilization is spatially distinct from stomatal conductance reduction in controlling ecosystem water-use efficiency increase
	Zhang, Xuanze; Zhang, Yongqiang; Tian, Jing; Ma, Ning; Wang, Ying-Ping
通讯作者	Zhang, XZ ; Zhang, YQ
来源期刊	ENVIRONMENTAL RESEARCH LETTERS
ISSN	1748-9326
出版年	2022
卷号	17 期号:5
英文摘要	It is well known that global ecosystem water-use efficiency (EWUE) has noticeably increased over the last several decades. However, it remains unclear how individual environmental drivers contribute to EWUE changes, particularly from CO2 fertilization and stomatal suppression effects. Using a satellite-driven water-carbon coupling model-Penman-Monteith-Leuning version 2 (PML-V2), we quantified individual contributions from the observational drivers (atmospheric CO2, climate forcing, leaf area index (LAI), albedo and emissivity) across the globe over 1982-2014. The PML-V2 was well-calibrated and showed a good performance for simulating EWUE (with a determination coefficient (R (2)) of 0.56) compared to observational annual EWUE over 1982-2014 derived from global 95 eddy flux sites from the FLUXNET2015 dataset. Our results showed that global EWUE increasing trend (0.04 +/- 0.004 gC mm(-1) H2O decade(-1)) was largely contributed by increasing CO2 (51%) and LAI (20%), but counteracted by climate forcing (-26%). Globally, the CO2 fertilization effect on photosynthesis (23%) was similar to the CO2 suppression effect on stomatal conductance (28%). Spatially, the fertilization effect dominated EWUE trend over semi-arid regions while the stomatal suppression effect controlled over tropical forests. These findings improve understanding of how environmental factors affect the long-term change of EWUE, and can help policymakers for water use planning and ecosystem management.
英文关键词	ecosystem water-use efficiency CO2 fertilization stomatal conductance climate change earth greening
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000796208700001
WOS关键词	MODEL INTERCOMPARISON PROJECT ; GROSS PRIMARY PRODUCTION ; CARBON-DIOXIDE ; SHORTWAVE ALBEDO ; EDDY COVARIANCE ; PLANT-RESPONSES ; ENRICHMENT FACE ; DECADAL TRENDS ; LAND-USE ; PART 1
WOS类目	Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/392505
推荐引用方式 GB/T 7714	Zhang, Xuanze,Zhang, Yongqiang,Tian, Jing,et al. CO2 fertilization is spatially distinct from stomatal conductance reduction in controlling ecosystem water-use efficiency increase[J],2022,17(5).
APA	Zhang, Xuanze,Zhang, Yongqiang,Tian, Jing,Ma, Ning,&Wang, Ying-Ping.(2022).CO2 fertilization is spatially distinct from stomatal conductance reduction in controlling ecosystem water-use efficiency increase.ENVIRONMENTAL RESEARCH LETTERS,17(5).
MLA	Zhang, Xuanze,et al."CO2 fertilization is spatially distinct from stomatal conductance reduction in controlling ecosystem water-use efficiency increase".ENVIRONMENTAL RESEARCH LETTERS 17.5(2022).