Elevation-dependent changes in reference evapotranspiration due to climate change

doi:10.1016/j.envpol.2020.114082

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > 山地表生过程与生态调控重点实验室

	Elevation-dependent changes in reference evapotranspiration due to climate change
	Sun Juying 1,2; Wang Genxu 3; Sun Xiangyang 3; Lin Shan 1,2; Hu Zhaoyong 3; Huang Kewei 1,2
刊名	HYDROLOGICAL PROCESSES
	2020
卷号	34 期号:26 页码:5580-5594
关键词	climate change contribution analysis elevation‐ dependency reference evapotranspiration sensitivity
ISSN号	0885-6087
DOI	10.1016/j.envpol.2020.114082
产权排序	1
文献子类	Article
英文摘要	The Food and Agriculture Organizations' (FAO) Penman-Monteith reference evapotranspiration (ET0) is a crucial index in the research of water and energy balance. Temporal and spatial variations in ET0 from 1981-2017 were investigated in the Hengduan Mountains, China(.) The results showed a change point around the year 2000 in ET0 series. ET0 decreased and increased significantly by +3.200 mm/year (p < 0.01) from 1981-2000 and by +4.109 mm/year (p < 0.01) from 2001-2017, respectively. The contribution analysis shows that the positive significant contribution of air temperature (TA) was offset by negative effects of decreases in downward shortwave radiation (R-s) and wind speed (WS) and an increase in actual vapour pressure (e(a)), causing the decrease in ET0 from 1981 to 2000. WS was the largest contributing factor for the decrease in ET0 from 1981 to 2000 during spring, winter and annually, while R-s and e(a) were the largest negative contributors in summer and autumn, respectively. An increase in TA was responsible for the increase in ET0 in all seasons except winter and the annual scale in 2001-2017. The sensitivity analysis shows that ET0 was most sensitive to TA, and WS was the least sensitive variable. The trends of ET0 increased with elevation;we denote this as the elevation-dependence of ET0 changes. The elevation-dependence was also noted for the trends of WS and e(a), with higher elevations showing larger changes in WS and lower changes in e(a). Besides, the sensitivities of TA, R-s and e(a) decreased with elevation, while that of WS increased slightly with elevation. A comprehensive investigation into the trends of climatic drivers and their sensitivities revealed complex trends of the contributions of climatic variables on ET0 with elevation, with no uniform trend existed in seasons. The results will contribute to our understanding of the response of ET0 to climate change in a mountainous area, and provide a guideline for the water resources management under climate change.
电子版国际标准刊号	1873-6424
资助项目	National Natural Science Foundation of China[41790431] ; Chinese Academy of Sciences[XDA23090201]
WOS关键词	REFERENCE CROP EVAPOTRANSPIRATION ; ECOLOGICAL WATER REQUIREMENT ; RIVER-BASIN ; TIBETAN PLATEAU ; YELLOW-RIVER ; PAN EVAPORATION ; GROWING-SEASON ; WIND-SPEED ; TRENDS ; CHINA
WOS研究方向	Water Resources
语种	英语
出版者	WILEY
WOS记录号	WOS:000591787200001
资助机构	National Natural Science Foundation of China ; Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/50763]
专题	成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室
通讯作者	Wang Genxu
作者单位	1.University of Chinese Academy of Sciences, Beijing, China; 2.Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, China; 3.State Key Laboratory of Hydraulics and Mountain River Engineering, College of Water Resource and Hydropower, Sichuan University, Chengdu, China
推荐引用方式 GB/T 7714	Sun Juying,Wang Genxu,Sun Xiangyang,et al. Elevation-dependent changes in reference evapotranspiration due to climate change[J]. HYDROLOGICAL PROCESSES,2020,34(26):5580-5594.
APA	Sun Juying,Wang Genxu,Sun Xiangyang,Lin Shan,Hu Zhaoyong,&Huang Kewei.(2020).Elevation-dependent changes in reference evapotranspiration due to climate change.HYDROLOGICAL PROCESSES,34(26),5580-5594.
MLA	Sun Juying,et al."Elevation-dependent changes in reference evapotranspiration due to climate change".HYDROLOGICAL PROCESSES 34.26(2020):5580-5594.