近59 a锡林河流域潜在蒸散发及地表干湿状况变化趋势分析

doi:10.12118/j.issn.1000-6060.2020.04.14

Abstract

Abstract: Using the daily meteorological data of the period from 1960 to 2018, which were obtained from 13 meteorological stations surrounding the Xilin River Basin,Inner Mongolia,China,the Penman-Monteith formula recommended by the Food and Agriculture Organization of the United Nations （FAO） was used to calculate the multiyear potential evapotranspiration and relative humidity index in each weather station. The potential evapotranspiration and surface wet and dry conditions of the Xilin River Basin were explored over the aforementioned period through principal component,correlation,and partial correlation analyses. The cyclical changes in the potential evapotranspiration in the Xilin River Basin and their correlations to the relative humidity index and various meteorological elements were discussed. The results indicated that the potential evapotranspiration in the basin in recent 59 a exhibited a significant overall increasing trend. Significant increasing and decreasing trends were found among the characteristics of the multiscale time-frequency changes and multiperiod changes,respectively. The response was larger,followed by average wind speed. The average relative humidity followed by precipitation were the most affected by the potential evapotranspiration. The entire basin environment exhibited an insignificant tendency to become humid.

Key words: Xilin River Basin, potential evapotranspiration, surface wet and dry conditions

ZHANG Lu, ZHU Zhong-yuan, ZHANG Sheng-wei, WANG Hui-min, WANG Fei, XI Xiao-kang. Trends of potential evapotranspiration and surface wet conditions in the Xilin River Basin in recent 59 years[J].Arid Land Geography, 2020, 43(4): 997-1003.

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Trends of potential evapotranspiration and surface wet conditions in the Xilin River Basin in recent 59 years

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