Climatological Characteristics of Sunshine Duration for the Basin of Jianjiang River over the Past 50 Years
Using the methods of linear tendency and Mann-Kendall abruptness test,this paper analyzed the climatological characteristics of yearly and seasonal sunshine duration for the basin of Jianjiang River for 1973 to 2022.The results are shown as follows.Over the 50 years studied,the sunshine duration tended to increase insignificantly for the spring but decrease insignificantly for the remaining three seasons and on the yearly scale.It is known from a nine-year running mean that the sunshine duration was between 550 and 640 h for summer and autumn and between 300 and 400 h for spring and winter.The spring sunshine duration had an abrupt change around 2007 and the autumn one experienced it around 1995.The yearly sunshine du-ration oscillated significantly at the periods of two to six years.On the spatial distribution,the yearly sun-shine duration decreased progressively from south to the middle and north.It was much negatively correlated with relative humidity,rainfall,rain days,total cloudage and low cloud amount but much positively correla-ted with average temperature and average maximum temperature in summer.
climatologysunshine durationnine-year running meanclimatological tendencybasin of Jianjiang River
万方数据
维普
