上海市光化学污染气象指标的研究

Meterological indexes of photochemical pollution in Shanghai

利用１９９０ —１９９４ 年地面Ｏ３ 浓度观测和有关气象资料，进行统计处理后，通过深入详细的对比分析，确立了上海市高浓度Ｏ３ 日或光化学污染的１２ 个气象指标，引入权重概念表示各个气象指标对出现高浓度Ｏ３ 日的重要性次序：高压天气、ｆ＜ ６０ ％ 、珡ＮＬ ＜２ ．５／１０ 、珡ＮＳ ＜ ６ ．０／１０ ，其次是ｔｓ ≥７ ｈ ．

Surface ozone concentrations and relevant meteorological data from 1990—1994 were analyzed.Twelve meterorological indexes for high ozone concentration day (photochemical pollution day) were identified.A “weight” concept was into these meteorological indexes to describe the order of importance.It was found that the high pressure weather system was the most important index, f <60%, N \-L<2.5/10,and N s<6.0/10 were the second\|most important indexes,and t s≥7?h was the third\|most important index. F is the relative humidity measured at 14?h; N L and N s are the average values of four observations a day for the lower cloud cover and the total cloud cover,respectively; t s is the daily sunshine hour.