摘要
根据2008年拉萨站总云量资料以及臭氧光谱仪（BREWER）观测得到的红斑权重UVB资料,分析了总云量对红斑权重UVB的影响.结果表明,总云量为1～4成时,对红斑权重UVB平均增减幅度不大;总云量为6～ 10成时,对红斑权重UVB的平均影响表现为衰减,且平均衰减程度随云量等级变高而加剧,总云量等级越高,红斑权重UVB增强概率越小;各级总云量云层反射辐射对红斑权重UVB的平均增强幅度没有明显规律,平均增幅为19.2％;在被太阳直接照射的情况下,有云天气将承受比晴天更强的紫外线辐射,因此有云天气要更加注意紫外线辐射的防护.
Based on the CIE Erythema UVB observation data and the total cloud cover data of Lhasa in 2008,the effects of cloud on CIE Erythema UVB were discussed.The results showed that the average effect of total cloud cover on CIE Erythema UVB is not obvious when the total cloud cover is 1 to 4,and when it is 6 to 10,the attenuation is more obvious with the higher of loud cover level.The higher the cloud cover level is,the increasing probability of CIE Erythema UVB is smaller; the average enhancement of clouds reflection radiation on CIE Erythema UVB has nothing to do with total cloud cover,and the average value is 19.2％ ; when the sun direct illuminate,additional radiation reflected from clouds makes cloudy skies even more dangerous than clear skies,so we should pay more attention to protection.
出处
《安徽农业科学》
CAS
2013年第26期10748-10749,10761,共3页
Journal of Anhui Agricultural Sciences
基金
国家自然科学基金(41065001)
西藏自治区气象局高原遥感应用技术创新团队建设计划
关键词
拉萨
总云量
红斑权重UVB
影响
Lhasa
Total cloud cover
CIE Erythema UVB
Influence
