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[1]SUN Congjian,ZHENG Zhenjing,LI Wei,et al.Spatial and Temporal Variation Characteristics of Potential Evapotranspiration and Its Impact Factors of Shanxi Province During the Period 1964-2017[J].Research of Soil and Water Conservation,2019,26(05):229-235.

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Spatial and Temporal Variation Characteristics of Potential Evapotranspiration and Its Impact Factors of Shanxi Province During the Period 1964-2017

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 26 Number of periods: 2019 05 Page number: 229-235 Column: Public date: 2019-09-06

Title:: Spatial and Temporal Variation Characteristics of Potential Evapotranspiration and Its Impact Factors of Shanxi Province During the Period 1964-2017

Author(s):: SUN Congjian^1,2, ZHENG Zhenjing¹, LI Wei¹, YANG Wei¹, HOU Huixin¹; 1. School of Geographical Sciences, Shanxi Normal University, Linfen, Shanxi 041000, China;
2. State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China

Keywords:: potential evapotranspiration; Penman-Monteith model; spatial distribution; influence factors; Shanxi Province

CLC:: P426.2

DOI:: -

Abstract:: The potential evapotranspiration capacity represents the maximum evaporation capacity of a region and is an important component of the heat balance of the Earth’s surface, providing a reference for regional water resources management. We analyzed spatial and temporal variation characteristics of potential evapotranspiration in Shanxi Province with daily observed data of 17 meteorological stations from 1964 to 2017 based on Penman-Monteith model, Wavelet Analysis, Mann-Kendall and ArcGIS interpolation method. And its influencing factors were analyzed by using the principal component analysis. The results showed that the average potential evapotranspiration in Shanxi Province was 1 148.6 mm and presented the fluctuation growth trend; the main period was 27-year while the minor periods was 9-year and 45-year. The spatial variation of the multi-year average potential evapotranspiration in the Shanxi Province showed that the central region was decreasing to the north and south, the northern region had lower potential evapotranspiration than the southern region, and the low-lying region had higher potential evapotranspiration. The potential evapotranspiration of Shanxi Province showed a downward trend in northwest and southeast, while it showed an increasing trend in the northeast and southwest, especially significant in the northeast. The average water vapor pressure and relative humidity are the main factors affecting the potential evapotranspiration of Shanxi Province. Mean annual potential evapotranspiration is positively correlated to the mean temperature, wind speed, sunshine hours and latitude, and negatively correlated with relative humidity, water vapor pressure and altitude.

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