Abstract:The surface actinic flux peak, the magnitude and spectrum of irradiance and diurnal/seasonal variations over the Guangzhou region were studied by analyzing the surface measurements and by using NCAR TUV radiative model. The difference between the calculation and observation were used to assess the effect of aerosol particles on ultraviolet radiation (UV) flux. The diurnal features of actinic flux and irradiance had the same patterns as the Sine-curve, but the Sine shape of actinic flux was wider than that of irradiance, and the radiation intensity of actinic flux also dropped more slowly with the increasing of solar zenith angle than that of irradiance. The total energy of actinic flux took up about 86% in the visible spectrum while only about 14% in the ultraviolet spectrum. The theoretical calculation and observation showed that the differences were obvious by using different radiometers covering different spectra, although the radiometers were labeled as UVA or UVB radiometers. The aerosol particles significantly affected the UV flux over the Guangzhou region. Because UV flux was a key factor to influence tropospheric ozone production, the better understanding of the interactions between UV flux and aerosol particles was needed over the Guangzhou region.
邓雪娇, 周秀骥, 吴兑, 铁学熙, 李菲, 谭浩波, 毕雪岩, 邓涛, 蒋德海. 广州地区光化辐射通量与辐照度的特征[J]. 中国环境科学, 2010, 30(7): 893-899.
DENG Xue-Jiao, ZHOU Xiu-Ji, WU Dui, TIE Xue-Xi, LI Fei, TAN Hao-Bo, BI Xue-Yan, DENG Tao, JIANG De-Hai. Characterization of actinic flux and irradiances over Guangzhou region. CHINA ENVIRONMENTAL SCIENCECE, 2010, 30(7): 893-899.