干旱区生态环境知识资源中心(Arid): Revisiting the global distribution of the exponent of the power-function complementary relationship of terrestrial evaporation: Insights from an isenthalpic index

Arid

DOI	10.1016/j.jhydrol.2024.131864
	Revisiting the global distribution of the exponent of the power-function complementary relationship of terrestrial evaporation: Insights from an isenthalpic index
	Szilagyi, Jozsef; Ma, Ning; Crago, Richard D.
通讯作者	Ma, N
来源期刊	JOURNAL OF HYDROLOGY
ISSN	0022-1694
EISSN	1879-2707
出版年	2024
卷号	642
英文摘要	The complementary relationship (CR) of evaporation is one of widely-used approaches in estimating terrestrial evapration (E). However, the determination of the parameter values in CR-based models remains a difficult task. This is especially true for the new power-function complementary relationship (PCR) model developed recently, in which the key parameter that accounts for the effect of moisture advection over the drying land, b, must be well calibrated with consideration of an approporiate physical basis. Here, by proposing a new isenthalpic index that can be used for determining b directly without resorting to any a priori information of global E, this study found that the resulting b values (median = 1.64, standard deviation = 0.73) are generally smaller and display a narrower range than those reported recently by Kim et al. (2024). When applied with monthly input variables of 124 FLUXNET stations, the gridded b values improve upon E estimates that employ either i) a standard value of b (=2), or; ii) a calibrated value (same for all stations). The global distribution of the gridded b values -in contrast to those obtained by Kim et al. (2024) -aligns with its physical interpretation: low values (1 < b < 2) where the effect of moisture advection is weak (i.e., permanently/periodically wet, humid regions or regions far away from any significant external moisture source) and high ones (b > 2) when strong (i.e., warm arid/semi arid regions near a sea or high mountains of abundant moisture). The gridded b values improve the calibration-free PCR that employs a constant b (=2) and a Priestley-Taylor coefficient linked to the wet-environment air temperature.
英文关键词	Complementary relationship Calibration-free estimation of terrestrial evaporation Isenthalpic index
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001304154100001
WOS关键词	EVAPOTRANSPIRATION ; EQUATION ; WATER
WOS类目	Engineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
WOS研究方向	Engineering ; Geology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/404612
推荐引用方式 GB/T 7714	Szilagyi, Jozsef,Ma, Ning,Crago, Richard D.. Revisiting the global distribution of the exponent of the power-function complementary relationship of terrestrial evaporation: Insights from an isenthalpic index[J],2024,642.
APA	Szilagyi, Jozsef,Ma, Ning,&Crago, Richard D..(2024).Revisiting the global distribution of the exponent of the power-function complementary relationship of terrestrial evaporation: Insights from an isenthalpic index.JOURNAL OF HYDROLOGY,642.
MLA	Szilagyi, Jozsef,et al."Revisiting the global distribution of the exponent of the power-function complementary relationship of terrestrial evaporation: Insights from an isenthalpic index".JOURNAL OF HYDROLOGY 642(2024).