| 上海城区雾的形成和特征 |
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| 引用本文： | 周淑贞.上海城区雾的形成和特征[J].应用气象学报,1991,2(2):140-146. |
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| 作者姓名： | 周淑贞 |
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| 作者单位： | 1.华东师范大学地理系 |
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| 摘 要： | 本文对上海市区1984年全年27个雾日的天气形势和有关气象要素的变化作了比较深入的分析。发现上海该年出现4种雾类即:锋面雾（占40.7%）、辐射雾（占29.7%）、平流辐射雾（占18.5%）和平流雾（占11.1%）。并指出上海城市雾具有下述三个主要特征:（1）近数十年来年平均雾日数有递减趋势，近8年年平均雾日比前20年减少14.4天；（2）在城市辐射雾和平流辐射雾出现前，出现城市湿岛的机率高达92.3%，可作为这两种雾的先兆。在秋冬季节，在这两种雾中，还出现雾天城市湿岛效应；（3）有相当多的低相对湿度城市“浊雾”。
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The Formation and Features of Fog in Shanghai Urban Area |
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| Affiliation: | (East China Normal University) |
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| Abstract: | This paper deals with the formation and classification of the fog in Shanghai urban area. By analysing the records 27 fog days during 1984, it is found that there are four types of fogs: frontal fog (accounting for 40.7%), radiation fog (accounting for 29.7%), advection radiation fog (accounting for 18.5%), and advection fog (accounting for 11.1%). Each type is explained in detail with some examples. In addition, using the Shanghai fog day data during 1951—1988, it is pointed out that : (1) In Shanghai urban area, the mean fog day becomes fewer, (2) Shanghai urban fog is closely related to the urban moisture island, (3) The urban “pollutant fog” with the low relative humidity frequently occurs in Shanghai. |
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