Analysis of climate change characteristics and mutation changes in Zhaoyuan area in the past 61 years
Based on the ground observation and compilation data of the national meteorological observatory in Zhaoyuan from 1961 to 2021,the climate change characteristics,such as annual change trend of the annual average temperature,extreme minimum temperature,annual difference of temperature,precipitation and sunshine hours in Zhaoyuan are analyzed,by using univariate linear regression analysis,climate tendency rate,and Mann-Kendal method.The results show that the annual average temperature in Zhaoyuan has shown a very significant upward trend in the past 61 years,with an increase of 0.24 ℃ every 10 year.The overall trend of precipitation is not obvious,with a reduction of 0.34 mm every 10 year,and precipitation is mainly concentrated in the 1980s.The sunshine hours showed a significant decrease trend,with a decrease of 63.1 h every 10 year.The mutation changes of annual average temperature,extreme minimum temperature and sunshine hours occurred in 1986,1975 and 1971 respectively,but the mutation changes of annual precipitation are relatively frequent.The research results provide support for the sustainable development and efficient utilization of agricultural resources in the Zhaoyuan area.
万方数据
维普
