气候变化领域集成服务门户(CCPortal): Effect of Elevation on Variation in Reference Evapotranspiration under Climate Change in Northwest China

CCPortal

DOI	10.3390/su131810151
	Effect of Elevation on Variation in Reference Evapotranspiration under Climate Change in Northwest China
	Liu, Wei; Yang, Linshan; Zhu, Meng; Adamowski, Jan F.; Barzegar, Rahim; Wen, Xiaohu; Yin, Zhenliang
通讯作者	Yang, LS (通讯作者)，Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Ecohydrol Inland River Basin, Lanzhou 730000, Peoples R China.
发表日期	2021
EISSN	2071-1050
卷号	13 期号:18
英文摘要	Through its effects on water and energy cycles, elevation plays an important role in modulating the spatial distribution of climatic changes in mountainous regions. A key hydrological indicator, reference evapotranspiration (ET0) reflects the maximum amount of water transferred to the atmosphere from the land surface. The current scarcity of information regarding elevation's impact on variation in ET0 under climate change limits our understanding of the extent to which elevation modulates interactions between ET0 and climate change and of the attendant processes involved. Drawing upon long-term (1960-2017) meteorological observations from 84 stations in Northwest China (NWC), we examined (i) spatial and temporal variations in ET0; (ii) the sensitivity and contribution of air temperature (T), sunshine duration (SD), relative humidity (RH), and wind speed (WS) to ET0; (iii) the existence of a relationship between elevation and ET0 trends; and (iv) the major factor in controlling this relationship by using attribution analysis. Overall, annual ET0 in NWC showed a declining trend between 1960 and 2017, though at a change point in 1993, the trend shifted from a decline to a rise. A significant correlation between temporal change in ET0 and elevation confirmed the existence of a relationship between elevation and ET0 variation. The effect of elevation on changes in ET0 depended mainly on the elevation-based tradeoff between the contributions of T and WS: WS was the primary factor contributing to the decrease in ET0 below 2000 m, and T was the dominant factor contributing to the increase of ET0 above 2000 m. The rate of reduction in WS declined as elevation increased, thereby diminishing its contribution to variation in ET0. The present study's results can serve to guide agricultural irrigation in different elevation zones under NWC's evolving climatic conditions.
关键词	REFERENCE CROP EVAPOTRANSPIRATION KENDALL TREND TEST POTENTIAL EVAPOTRANSPIRATION RIVER-BASIN SPATIOTEMPORAL VARIABILITY METEOROLOGICAL FACTORS SENSITIVITY IRRIGATION PLATEAU PRECIPITATION
英文关键词	climate change; reference evapotranspiration; attribution analysis; elevation effect; Northwest China
语种	英语
WOS研究方向	Science & Technology - Other Topics ; Environmental Sciences & Ecology
WOS类目	Green & Sustainable Science & Technology ; Environmental Sciences ; Environmental Studies
WOS记录号	WOS:000701783700001
来源期刊	SUSTAINABILITY
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/253927
作者单位	[Liu, Wei; Yang, Linshan; Zhu, Meng; Wen, Xiaohu; Yin, Zhenliang] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Ecohydrol Inland River Basin, Lanzhou 730000, Peoples R China; [Adamowski, Jan F.; Barzegar, Rahim] McGill Univ, Fac Agr & Environm Sci, Dept Bioresource Engn, Montreal, PQ H9X 3V9, Canada
推荐引用方式 GB/T 7714	Liu, Wei,Yang, Linshan,Zhu, Meng,et al. Effect of Elevation on Variation in Reference Evapotranspiration under Climate Change in Northwest China[J]. 中国科学院西北生态环境资源研究院,2021,13(18).
APA	Liu, Wei.,Yang, Linshan.,Zhu, Meng.,Adamowski, Jan F..,Barzegar, Rahim.,...&Yin, Zhenliang.(2021).Effect of Elevation on Variation in Reference Evapotranspiration under Climate Change in Northwest China.SUSTAINABILITY,13(18).
MLA	Liu, Wei,et al."Effect of Elevation on Variation in Reference Evapotranspiration under Climate Change in Northwest China".SUSTAINABILITY 13.18(2021).