HUBEI AGRICULTURAL SCIENCES ›› 2021, Vol. 60 ›› Issue (5): 35-38.doi: 10.14088/j.cnki.issn0439-8114.2021.05.007

• Resource & Environment • Previous Articles     Next Articles

Seasonal variation and climatic factors of reference crop evapotranspiration in Henan province

WANG Qi-bo, ZHANG Chen   

  1. Xinyang Meteorological Bureau, Xinyang 464000,Henan,China
  • Received:2020-04-11 Online:2021-03-10 Published:2021-03-22

Abstract: Based on the daily data of 99 meteorological stations in Henan province from 1965 to 2018, the daily reference crop evapotranspiration was calculated by using of FAO Penman-Monteith equation. The spatiotemporal variation of reference crop evapotranspiration were analyzed by using trend analysis, and its climatic factors were analyzed by correlation analysis and partial correlation analysis. The results showed that the seasonal reference crop evapotranspiration was significant decreasing, and the decreased order of absolute value of climate tendency rate was summer, autumn, winter, spring. The distribution of reference crop evapotranspiration in spring was latitudinal, while that in summer and autumn were meridional. The decrease of wind speed and sunshine hours relative humidity were the main reason for the decrease of reference crop evapotranspiration in Henan province.

Key words: reference crop evapotranspiration, Penman-Monteith equation, spatio-temporal variation, impact factors, Henan province

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