干旱区生态环境知识资源中心(Arid): Interaction between wind speed and net radiation controls reference evapotranspiration variance in the inland river basin of Northwest China

Arid

DOI	10.1002/hyp.14620
	Interaction between wind speed and net radiation controls reference evapotranspiration variance in the inland river basin of Northwest China
	Ning, Tingting; Feng, Qi; Li, Ruolin; Yang, Linshan
通讯作者	Yang, LS
来源期刊	HYDROLOGICAL PROCESSES
ISSN	0885-6087
EISSN	1099-1085
出版年	2022
卷号	36 期号:6
英文摘要	Exploring the variance in reference evapotranspiration (ET0) and its dominant influencing factors is important for climate change, hydrological cycles and water management. Temperature (T), wind speed (U-2), net radiation (R-n) and actual vapour pressure (e(a)) are the major climatic input variables in Penman-Monteith equation. Previous studies have successfully applied the total differential method to determine the relative contributions of changes in these variables to variation in ET0 on different timescales. However, the interaction of climatic variables has not been incorporated into this method. Taking the inland river basin of Northwest China as the study area, we extended the total differential method to decompose the ET0 variance into temporal variance and covariance of T, U-2, R-n and e(a) on intra-annual and annual scales during 1960-2017. The results indicated that the variance in ET0 on the intra-annual scale was larger than that on the annual scale. Among the four single climatic variables, U-2 variance made larger contributions to intra-annual and annual ET0 variance with relative contributions of 6.8% and 1.1%, respectively. However, the interaction of climatic variables played a dominant role in the variation in ET0. Specifically, on intra-annual scale, coupled U-2 and R-n primarily controlled the ET0 variance (76.1%), followed by coupled R-n and e(a) (9.6%); but their positive effects were weakened by the negative effects of coupled T and e(a) (-2.3%). On annual scale, coupled U-2 and R-n still governed the variance in ET0 (97.3%), but the effects were also weakened by other groups of interaction effects. Furthermore, ET0 was highly related to NDVI on an intra-annual scale (R-2 = 0.68, p = 0.00), indicating the strong effect of seasonal vegetation dynamics on ET0 variance. This study provides new insights to quantitatively assess the interaction effects of environmental factors on key hydrometeorological variables.
英文关键词	different time scales total differential method unbiased sample variance vegetation dynamics
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000814874600001
WOS关键词	REFERENCE CROP EVAPOTRANSPIRATION ; PAN EVAPORATION ; LOESS PLATEAU ; POTENTIAL EVAPOTRANSPIRATION ; SENSITIVITY-ANALYSIS ; SURFACE EVAPORATION ; CLIMATE-CHANGE ; ARID REGION ; TRENDS ; CATCHMENT
WOS类目	Water Resources
WOS研究方向	Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/393049
推荐引用方式 GB/T 7714	Ning, Tingting,Feng, Qi,Li, Ruolin,et al. Interaction between wind speed and net radiation controls reference evapotranspiration variance in the inland river basin of Northwest China[J],2022,36(6).
APA	Ning, Tingting,Feng, Qi,Li, Ruolin,&Yang, Linshan.(2022).Interaction between wind speed and net radiation controls reference evapotranspiration variance in the inland river basin of Northwest China.HYDROLOGICAL PROCESSES,36(6).
MLA	Ning, Tingting,et al."Interaction between wind speed and net radiation controls reference evapotranspiration variance in the inland river basin of Northwest China".HYDROLOGICAL PROCESSES 36.6(2022).