郑州地区紫外线辐射强度变化规律分析

由于地球自转和公转的原因,太阳紫外线辐射强度呈现出以一年和一天为周期的规律性变化.一年之内,以夏季最强,冬季最弱;一天之内,中午前后最强,早晚最弱.影响紫外线辐射强度的因子比较多,最主要的是云量、云状和能见度.经分析,紫外线辐射强度随着云量的增加而减小,随着能见度的增大而增强;高云对紫外线辐射强度影响较小,低云影响较大,中云居中.通过研究,确定了它们之间的定量关系.

Variation Analysis Of Ultraviolet Radiation Intensity over Zhengzhou

Because of rotation and revolution of the earth, solar ultraviolet radiation intensity varies in diurnal and annual periodic. It is the highest in summer and the lowest in winter within a year. As for the diurnal variation, the maximum occurs around midday and the minimum is in early morning and evening. The ultraviolet radiation intensity was affected by many factors; especially cloud amount, cloud species and visibility. Itdecreases with increasing of cloud amount and increases with increasing of visibility. The high clouds have less affection to ultraviolet and the low clouds have great affections. The middle clouds affections are between them. By statistic analysis, the quantitative relationship among them was established. This research has laid the foundation for forecast of ultraviolet radiation intensity and meteorological service.