广州地区太阳分光辐射的某些变化特征

利用广州地区1985—1990年的太阳分光辐射的连续观测资料（观测角度为23°11′），研究了广州地区紫外辐射、可见光辐射（光合有效辐射）、近红外辐射的某些特征。结果指出，每年7—10月份各分光辐射及总辐射总量较大。月总辐射中可见光辐射占总辐射的百分比年平均为47.3%，相应的紫外辐射和近红外辐射分别占7.1%和45.6%。文中还分析了晴天条件下分光辐射的变化和1990年紫外辐射变化的某些特征，并分析和讨论了分光辐射与云量、日照时间等因子的相关。

Characteristics of Solar Spectral Radiation in the Guangzhou District

Characteristics of the solar ultraviolet radiation, visible radiation (photosynthetically active radiation) and near infrared radiation are examined by using the data of solar spectral radiations (observed angle is 23°11′) observed in the period of 1985—1990 in the Guangzhou district. The result shows that the monthly amounts of the solar spectral radiations and the total radiation are larger in July—October every year. The monthly mean ratio of visible to total radiation is 47.3%, infrared to total is 45.6% and UV to total is 7.1%. Furthermore, some features of the variations of solar spectral radiations in clear sky and UV radiation in 1990 are also given in the paper. And, the correlations of spectral radiations to cloud amounts, insolation duration and other factors are analyzed and discussed.