干旱区生态环境知识资源中心(Arid): An Increasing Effect of Soil Moisture on Semiempirical Water-Use Efficiency Models From Wet to Dry Climate Regions

Arid

DOI	10.1029/2022JG007347
	An Increasing Effect of Soil Moisture on Semiempirical Water-Use Efficiency Models From Wet to Dry Climate Regions
	Sun, Xiangyang; Zhang, Xinyu; Wang, Genxu; Hu, Zhaoyong; Song, Chunlin; Lin, Shan; Sun, Juying; Sun, Shouqin
通讯作者	Sun, XY ; Wang, GX
来源期刊	JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
ISSN	2169-8953
EISSN	2169-8961
出版年	2023
卷号	128 期号:6
英文摘要	Water use efficiency (WUE) is a crucial parameter for describing the relationship between carbon and water cycles in plants and ecosystems. Previous studies suggest that an additional intercept is necessary for the empirical WUE model. However, the impact of soil moisture on model performance remains uncertain. In this study, 71 sites of FLUXNET2015 were categorized into energy-limited, transitional, and water-limited climates based on the Budyko dryness index (DI). Modified WUE models were utilized to forecast daytime transpiration based on GPP x VPD0.5 with an intercept term, which evaluated whether soil moisture content regulates the intercept term with increasing dryness levels. Our results demonstrated that the WUE model with an additional net radiation (RN) term effectively predicts transpiration in energy-limited and transitional regions. On the other hand, the WUE model with an additional soil water content (SWC) term performs well in water-limited regions with annual precipitation of less than 400 mm and energy-limited regions with annual mean temperature of less than 5 & DEG;C. The significance of SWC on Nash-Sutcliffe efficiency increased from energy-limited to water-limited regions. The coupling of the RN and SWC terms as intercept terms in the empirical WUE model can enhance the prediction of Et in both energy-limited and transitional regions. With global warming leading to more extreme climates in both humid and arid regions, incorporating the SWC term in the empirical WUE model can enhance the accuracy of modeled daytime transpiration globally, providing an easy-to-use method to simulate global transpiration.
英文关键词	eddy covariance dryness index water use efficiency transpiration soil water content
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001022742900001
WOS关键词	NET ECOSYSTEM EXCHANGE ; VAPOR-PRESSURE DEFICIT ; CARBON-DIOXIDE EXCHANGE ; STOMATAL CONDUCTANCE ; HYDRAULIC CONDUCTANCE ; PHYSICAL-PROPERTIES ; BEECH FOREST ; PINE FOREST ; FLUXES ; DROUGHT
WOS类目	Environmental Sciences ; 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/2XILL650/397357
推荐引用方式 GB/T 7714	Sun, Xiangyang,Zhang, Xinyu,Wang, Genxu,et al. An Increasing Effect of Soil Moisture on Semiempirical Water-Use Efficiency Models From Wet to Dry Climate Regions[J],2023,128(6).
APA	Sun, Xiangyang.,Zhang, Xinyu.,Wang, Genxu.,Hu, Zhaoyong.,Song, Chunlin.,...&Sun, Shouqin.(2023).An Increasing Effect of Soil Moisture on Semiempirical Water-Use Efficiency Models From Wet to Dry Climate Regions.JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,128(6).
MLA	Sun, Xiangyang,et al."An Increasing Effect of Soil Moisture on Semiempirical Water-Use Efficiency Models From Wet to Dry Climate Regions".JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES 128.6(2023).