| 2006~2009年我国超大城市霾天气特征及影响因子分析 |
| 摘要点击 4469 全文点击 2238 投稿时间：2012-11-27 修订日期：2013-01-25 |
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| 中文关键词 超大城市 大气污染 能见度 可吸入颗粒物 相对湿度 |
| 英文关键词 megacity air pollution visibility PM10 relative humidity |
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| 中文摘要 |
| 收集了2006~2009年北京、上海、广州和成都能见度等气象因子以及SO2、NO2和PM10等环境空气质量资料,在此基础上统计分析上述4个超大城市霾天气频率季节和年际变化特征及其主要的影响因子. 结果表明,北京、上海、广州和成都霾天气频率季节最高值分别为夏季、冬季、春季和秋季. 北京和广州霾天气频率呈现逐渐下降趋势,而上海和成都呈现逐渐上升趋势. PM10和相对湿度是影响能见度或霾天气频率关键因子. 北京能见度变化对相对湿度比较敏感,而上海和广州对PM10浓度变化比较敏感,成都对相对湿度和PM10浓度敏感程度相当. |
| 英文摘要 |
| The meteorological and environmental data including visibility, SO2, NO2 and PM10 were collected in four major megacities (Beijing, Shanghai, Guangzhou and Chengdu) in the years 2006-2009. Based on the data, seasonal and annual variations of the haze frequency and the key impact factors were discussed. The results indicated that the highest frequencies of haze occurred in summer, winter, spring and autumn for Beijing, Shanghai, Guangzhou and Chengdu, respectively. The trends of haze frequency decreased in Beijing and Guangzhou, while increased in Shanghai and Chengdu during the studied period. The PM10 concentration and relative humidity were the key factors for visibility degradation in the four megacities. The variation of visibility was sensitive to relative humidity in Beijing, to PM10 in Shanghai and Guangzhou, and to both in Chengdu. |
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