摘要
利用贵阳地区近6年太阳紫外辐射的观测资料及相关的气象因子,分析了该地区太阳紫外辐射的变化特征。结果表明,贵阳地区紫外辐射逐时平均最大值为21W.m-2(四级强度),瞬时最大值为26.4W.m-2,未出现很强辐射(五级)的情况;4～9月出现强紫外辐射的时段较长,在10:00～15:00可达四级;13:00强紫外辐射在4～9月出现的几率最大,尤其是7月和8月分别达到52%和51%;晴天紫外辐射强且稳定,多云天气紫外辐射波动较大,阴雨天气紫外辐射较弱;一年中,晴天和多云条件下,中午时刻各月紫外辐射量均超过了10W.m-2,而阴天的情况下仅在7～9月出现中等辐射,3种天气情况下的紫外辐射随季节的变化趋势相似,均表现为冬季弱、夏季强的特点;云量、相对湿度以及能见度与贵阳地区太阳紫外辐射具有显著的相关性。
Based on the observation data of Guiyang in recent 6 years,the change characteristic of ultraviolet（UV） radiation is analyzed. The results showed that the maximum of hourly averageUV radiation is 21 W·m-2（four-grade intensity）,and the instantaneous maximum is 26.4 W·m-2,strong UV radiation in 5 grade does not appear.Strong UV radiation period is long fromApril to September,and it can reaches 4 gradesat 10：00～15：00;Strong UVradiation at 13：00 occurrs most probably from April to September,especially in July and August,it reaches 52% and 51%,respectively.UVradiation is strong and stable in sunnyday,fluctuates obviously incloudy day and weak in rainy day;Monthly UV radiation at noon exceed10W·m-2under sunny and cloudy conditions,while only medium intensityappears from July to September under overcast condition;seasonalvariation trends under three weather conditions are similar,they are all weak in winter and strong in summer.Cloudiness,relative humidityand visibility have significant correlation tothe UV radiation in Guiyang.
出处
《高原气象》
CSCD
北大核心
2011年第4期1005-1010,共6页
Plateau Meteorology
基金
气象关键技术集成与应用项目(CMAGJ2011M44)资助
关键词
贵阳地区
紫外辐射
云量
相对湿度
能见度
Guiyang region
UV radiation
Cloudiness
Relative humidity
Visibility
