摘要
利用昆明2000年紫外辐射实测资料,研究了昆明紫外辐照度的变化特征。主要结果是:位于低纬、高原地区的昆明,紫外辐射最强的时段出现在5月,其平均紫外日曝辐量达2.11MJ.m-2;最弱的时段出现在1月,其平均日曝辐量仅为0.75MJ.m-2,约为5月相应值的1/3;居中的时段出现在8月,其平均日曝辐量达1.11MJ.m-2,约为5月相应值的1/2。紫外日曝辐量在日总辐射日曝辐量中所占的百分率不是常数,它随季节有明显变化:1月平均为7.75%,5月平均为12.72%,8月则为8.4%。
Observation of ultraviolet radiation during 2000 is conducted in the city of Kunming. Variation characteristics of ultraviolet radiation in Kunming are analyzed. The main results are summarized as follows. Kunming locates at Low latitudes and plateau, the strongest ultraviolet radiation is in May, its average daily radiant exposure is 2.11 MJ·m^-2 ; the weakest one is in January, its average daily radiant exposure is 0.75 MJ·m^-2, approximately 1/3 of May. Middle one is in August, and its average daily radiant exposure is 1.11 MJ·m^-2, approximately 1/ 2 of May. The percentage of daily ultraviolet radiant exposure against solar radiation is not a constant, it is obviously changing with the season. Average intensity of ultraviolet radiation in January in Kunming is 7.75% in May 12. 72%; in August 8. 4%.
出处
《气候与环境研究》
CSCD
北大核心
2006年第5期637-641,共5页
Climatic and Environmental Research
基金
云南城市气象研究项目YNKJ98001
关键词
低纬
高原
昆明
紫外辐射
low latitudes, plateau, The city of Kunming, ultraviolet radiation
