干旱区生态环境知识资源中心(Arid): Spatiotemporal variations in the ratio of transpiration to evapotranspiration and its controlling factors across terrestrial biomes

Arid

DOI	10.1016/j.agrformet.2022.108984
	Spatiotemporal variations in the ratio of transpiration to evapotranspiration and its controlling factors across terrestrial biomes
	Cao, Ruochen; Huang, Hui; Wu, Genan; Han, Daorui; Jiang, Zhiyun; Di, Kai; Hu, Zhongmin
通讯作者	Hu, ZM
来源期刊	AGRICULTURAL AND FOREST METEOROLOGY
ISSN	0168-1923
EISSN	1873-2240
出版年	2022
卷号	321
英文摘要	Quantifying the ratio of transpiration (T) to evapotranspiration (ET), T/ET, is crucial for understanding and predicting the water cycle and energy balance between the land and atmosphere. Here, we used three well-validated ET partitioning models to estimate T/ET at global fluxnet sites. The models are the Shuttleworth-Wallace-Hu (SWH) model, the Priestley-Taylor Jet Propulsion Lab (PT-JPL) model, and the underlying water use efficiency (uWUE) method. SWH illustrated the most reliable estimate in both the magnitude and the across-site variability of T/ET among three models. Mean annual T/ET derived from SWH, PT-JPL, and uWUE were 0.61 +/- 0.14, 0.52 +/- 0.12 and 0.59 +/- 0.07, respectively. Leaf area index (LAI) was the key driver of spatial variations in T/ET across sites, as well as seasonal variations in T/ET in ecosystems in most climatic zones except for the tropical and arid regions. However, there were discrepancies in factors controlling inter-annual variations in T/ET among the models. SWH and PT-JPL showed that the inter-annual variation in T/ET was more related to LAI than climatic factors but an opposite result was found by uWUE due to the simple structure and less forcing data of uWUE. The findings of our research highlight the importance of capturing the controls of LAI on ET partitioning for predicting future water cycle with land models. We appeal for direct measurements of ET components at the flux tower sites for validating the models and reduce model uncertainties.
英文关键词	Evapotranspiration partitioning Controlling factors Spatiotemporal variation Model comparison
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000806491800002
WOS关键词	WATER-USE EFFICIENCY ; VEGETATION CONTROL ; 2-SOURCE MODEL ; EVAPORATION ; ECOSYSTEMS ; FLUX
WOS类目	Agronomy ; Forestry ; Meteorology & Atmospheric Sciences
WOS研究方向	Agriculture ; Forestry ; Meteorology & Atmospheric Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/391573
推荐引用方式 GB/T 7714	Cao, Ruochen,Huang, Hui,Wu, Genan,et al. Spatiotemporal variations in the ratio of transpiration to evapotranspiration and its controlling factors across terrestrial biomes[J],2022,321.
APA	Cao, Ruochen.,Huang, Hui.,Wu, Genan.,Han, Daorui.,Jiang, Zhiyun.,...&Hu, Zhongmin.(2022).Spatiotemporal variations in the ratio of transpiration to evapotranspiration and its controlling factors across terrestrial biomes.AGRICULTURAL AND FOREST METEOROLOGY,321.
MLA	Cao, Ruochen,et al."Spatiotemporal variations in the ratio of transpiration to evapotranspiration and its controlling factors across terrestrial biomes".AGRICULTURAL AND FOREST METEOROLOGY 321(2022).