Abstract:

To understand the changes of solar ultraviolet radiation in Xilinhaote area and to study the global solar ultraviolet radiation to provide a reliable basis and reference for the foundation. According to the 2007-2009 global solar radiation and UV radiation observation data from Xilinhaote national climate observatory, the author used mathematical statistical methods and analyzed UV-B solar extreme ultraviolet radiation of Xilinhaote region. The results showed that: solar UV radiation was a part of global solar radiation, and the daily extreme came in around 12:30 or cloudy day. Small radiation occurred in the morning and evening, big in the lunch, and the overall change in the range of 0.01-3.05 W/m2. Annul extreme came only in sunny winter, spring, summer, and cloudy autumn, maximum in July for the 3.05 W/m2. Extreme ultraviolet radiation in Xilinhaote region at instantaneous change of the main trends and seasonal variation were consistent with the global solar radiation, extreme transient could appear in a cloudy day under any weather conditions, UV radiation intensity throughout the year changed in the safe range.