低纬高原城市区域冬季晴天不同波长辐射的特征

A PRELIMINARY STUDY ON THE CHARACTERISTIC OF RADIATION OF DIFFERENT WAVE LENGTH ON THE CLEAR WINTER DAYS IN THE REGION OF CITY OF LOW LATITUDES AND PLATEAU

利用低纬高原城市昆明城区内外不同波长辐射的实测资料，分析了研究得较少的城区内外不同波长辐射的分布特征、变化规律及其差异，主要结果如下：（１）城内因受周围大气环境质量的影响，各波长辐射量的变化离散性大于城外；不同波长辐射的绝对量和相对量（城内外比值）大多是城内小于城外，且以大气污染严重的午前差异显著。（２）低纬高原城市区域，冬季晴好天气时午前、午后不同波长辐射占总辐射的百分率存在差异；城内外各辐射的百分率及其变化特征也不相同，特别在大气污染严重的午前，差异十分显著。（３）冬季晴好天气时不同波长辐射的日总量和午前、午后总量，城内外同样存在明显的差异。

The observation of radiation of different wave length was conducted in the urban and rural areas of Kunming City. The main results on 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 string.(2)On the city of low latitudes and in plateau,on clear days of winter,the percentages of different wave length radiation in global radiation are different in the morning and in the afternoon.In the urban and in the rural areas, the percentages are different too. The difference is outstanding in the morning (because the pollution is strong). (3)At day time, in the morning and in the afternoon, there are difference in the total, the percentage and the ratio of radiation of different wave length between the urban and the rural areas.