石家庄市紫外线监测分析及预报方法

利用2006-2008年石家庄市紫外线监测数据,分析了近3年紫外线辐射特征,结果表明:石家庄市紫外线等级1～4级之间,其中1级的日数有175天,2级251天,3级220天,4级432天,年平均日数分别为58、84、73天和144天.紫外线指数“较强”级别出现的频率最高,“中等”以上日数占60.3％,说明石家庄属于紫外线...

Analysis of Ultraviolet Ray Monitoring Data in Shijiazhuang and Prediction Method

Using the ultraviolet ray monitoring data from 2006 to 2008 in Shijiazhuang, the characteristics of the ultraviolet radiation in the past three years are analyzed. The results show that the UV levels of Shijiazhuang ranged from Level 1 to Level 4, corresponding to 175, 251, 220, and 432 for the number of days, respectively. The relatively high level occurred most frequently, and the moderate level and higher accounted for 60.3%, which means that Shijiazhuang is an area with relatively high level ultraviolet radiation. The ultraviolet radiation was the strongest in spring and summer and the weakest in winter. The diurnal cycle of the ultraviolet radiation was very obvious, with a single peak distribution. The main meteorological factors that affect ultraviolet radiation are determined through correlation analysis. The ultraviolet index forecast equation containing a number of weather factors is established by using the multiple regression method. The accuracy rate of the equations for various seasons was above 50%, with the best accuracy rate being over 70% for autumn and winter. The equations could be used in operational ultraviolet index forecasting.