主办单位:中国气象局沈阳大气环境研究所
国际刊号:ISSN 1673-503X
国内刊号:CN 21-1531/P

Journal of Meteorology and Environment ›› 2022, Vol. 38 ›› Issue (1): 48-56.doi: 10.3969/j.issn.1673-503X.2022.01.007

• Articles • Previous Articles     Next Articles

Correlation analysis of evapotranspiration with air temperature, precipitation, and wind speed over the Yellow River Basin

Tong-hui GU1(),Xiao-dan GUAN1,2,*(),Zhao-kui GAO1,3,Xiao-qian HUANG1,Shu-yang GUO1   

  1. 1. College of Atmospheric Sciences, Lanzhou University, Key Laboratory of Semi-Arid Climate Change, Ministry of Education, Lanzhou 730000, China
    2. Collaborative Innovation Center for Western Ecological Safety, Lanzhou 730000, China
    3. School of Geographic Sciences, Southwest University, Chongqing 400715, China
  • Received:2021-06-21 Online:2022-02-28 Published:2022-03-02
  • Contact: Xiao-dan GUAN E-mail:guth17@lzu.edu.cn;guanxd@lzu.edu.cn

Abstract:

The Yellow River flows through the arid and semi-arid areas in China, and the variation of the evapotranspiration over the Yellow River Basin is particularly important for the local ecological security and economic development.Based on the ERA5 reanalysis data, we quantitatively analyzed the spatiotemporal variation of evapotranspiration in the Yellow River Basin from 1979 to 2020.In combination with observational data of temperature, precipitation, and wind speed, we also conducted the correlation analysis between evapotranspiration and three climatic factors.The results showed that the evapotranspiration over the Yellow River Basin has a decreasing trend with fluctuations from 1979 to 2020 and a large difference in its spatial distribution.The evapotranspiration increases near the source region, varies hardly near the arid regions in the upper reaches and decreases in the middle and lower reaches.Air temperature over the Yellow River Basin continues to increase from 1979 to 2020, meanwhile, the precipitation decreases with fluctuations, and wind speed has an increasing trend.The correlation analysis between evapotranspiration and climatic factors over the Yellow River Basin indicates that their correlations have obvious spatial differences.The evapotranspiration is negatively correlated with air temperature and wind speed and is positively correlated with precipitation over most areas in the Yellow River Basin.In terms of the multiple correlations, the correlations between evapotranspiration and climatic factors are strong in most areas of the basin, especially in the arid areas of the upper reaches.This study can provide scientific reference for the development and management of water resources and regional climate regulation over the Yellow River Basin.

Key words: The Yellow River Basin, Evapotranspiration, Temperature, Precipitation, Wind speed

CLC Number: