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Influence of Meteorological Factors on the Potential Evapotranspiration in Yanhe River Basin, China

文献类型：期刊论文

作者Luo, Yu1,3; Gao, Peng1,2,3; Mu, Xingmin1,2,3
刊名WATER
出版日期2021-05-01
卷号13期号:9页码:13
关键词climate change changing meteorological factors potential evapotranspiration sensitivity coefficient contribution rate dominant factor
DOI10.3390/w13091222
通讯作者Gao, Peng(gaopeng@ms.iswc.ac.cn) ; Mu, Xingmin(xmmu@ms.iswc.ac.cn)
英文摘要Potential evapotranspiration (ET0) is an essential component of the hydrological cycle, and quantitative estimation of the influence of meteorological factors on ET0 can provide a scientific basis for studying the impact mechanisms of climate change. In the present research, the Penman-Monteith method was used to calculate ET0. The Mann-Kendall statistical test with the inverse distance weighting were used to analyze the spatiotemporal characteristics of the sensitivity coefficients and contribution rates of meteorological factors to ET0 to identify the mechanisms underlying changing ET0 rates. The results showed that the average ET0 for the Yanhe River Basin, China from 1978-2017 was 935.92 mm. Save for a single location (Ganquan), ET0 increased over the study period. Generally, the sensitivity coefficients of air temperature (0.08), wind speed at 2 m (0.19), and solar radiation (0.42) were positive, while that of relative humidity was negative (-0.41), although significant spatiotemporal differences were observed. Increasing air temperature and solar radiation contributed 1.09% and 0.55% of the observed rising ET0 rates, respectively; whereas decreasing wind speed contributed -0.63%, and relative humidity accounted for -0.85%. Therefore, it was concluded that the decrease of relative humidity did not cause the observed ET0 increase in the basin. The predominant factor driving increasing ET0 was rising air temperatures, but this too varied significantly by location and time (intra- and interannually). Decreasing wind speed at Ganquan Station decreased ET0 by -9.16%, and was the primary factor underlying the observed, local "evaporation paradox". Generally, increase in ET0 was driven by air temperature, wind speed and solar radiation, whereas decrease was derived from relative humidity.
WOS关键词PENMAN-MONTEITH ; PAN EVAPORATION ; SENSITIVITY-ANALYSIS ; VARIABLES ; TRENDS
资助项目National Key Research and Development Program of China[2016YFC0501707]
WOS研究方向Environmental Sciences & Ecology ; Water Resources
语种英语
WOS记录号WOS:000650929100001
出版者MDPI
资助机构National Key Research and Development Program of China
源URL[http://ir.igsnrr.ac.cn/handle/311030/163925]  
专题中国科学院地理科学与资源研究所
通讯作者Gao, Peng; Mu, Xingmin
作者单位1.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Agr Loess Plate, Yangling 712100, Shaanxi, Peoples R China
2.Northwest A&F Univ, State Key Lab Soil Eros & Dryland Agr Loess Plate, Yangling 712100, Shaanxi, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100000, Peoples R China
推荐引用方式
GB/T 7714		 Luo, Yu,Gao, Peng,Mu, Xingmin. Influence of Meteorological Factors on the Potential Evapotranspiration in Yanhe River Basin, China[J]. WATER,2021,13(9):13.
APA Luo, Yu,Gao, Peng,&Mu, Xingmin.(2021).Influence of Meteorological Factors on the Potential Evapotranspiration in Yanhe River Basin, China.WATER,13(9),13.
MLA Luo, Yu,et al."Influence of Meteorological Factors on the Potential Evapotranspiration in Yanhe River Basin, China".WATER 13.9(2021):13.

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来源：地理科学与资源研究所

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