RADIATION OF ALL WAVELENGTHS ON FINE WINTER DAYS INSIDE AND OUTSIDE LOW-LATITUDE CITIES OVER PLATEAU

The observation of radiation of different wavelengths was conducted in the urban and rural areas of Kunming City. The main results for clear days obtained in this paper are summarized as follows. (1) In the urban area.the fluctuation of radiation of different wave length are larger in the urban area due to strong effect of pollution.The radiation (difference and ratio between urban and rural areas) is lesser in the urban than in the rural areas.The difference is outstanding in the morning when the pollution is strong. (2) In the urban area of cities on low.latitude plateau, percentage of radiation of different wavelengths in total radiation differ between the morning and afternoon on fine winter days, so do that between the urban and rural areas and relevant variations, and the difference is most substantial at the time before midday when the air pollution is serious. (3) The difference between the urban and rural areas also exists for the diurnal total, totals for the time before and after midday in radiation of all wavelengths under the same sky conditions.