| 沙尘天气过境前后北京大气污染物质量浓度的变化 |
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| 引用本文： | 方修琦,李令军,谢云. 沙尘天气过境前后北京大气污染物质量浓度的变化[J]. 北京师范大学学报(自然科学版), 2003, 39(3): 407-411 |
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| 作者姓名： | 方修琦 李令军 谢云 |
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| 作者单位： | 1. 北京师范大学资源与环境科学系,100875,北京
2. 北京市环境保护监测中心系统室,100044,北京 |
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| 基金项目： | 教育部高校骨干教师资助计划;; |
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| 摘 要： | 影响北京的沙尘天气可分为沙尘暴、浮尘和扬沙3种类型。沙尘暴和浮尘天气发生前后的污染物类型和质量浓度ρ有明显的差异，属2类不同性质的污染。在沙尘天气发生之前，大气中SO2，NO2等气态污染物的ρ往往较高，在大气逆温的情况下污染尤其严重，并且与颗粒物的ρ相关性较好；随着沙尘天气的爆发，颗粒物的ρ骤然增加，但伴随沙尘天气出现的大风使SO2，NO2等污染物的ρ显著下降，大气污染转变为由降尘过程造成的相对单一的颗粒物污染，属典型的沙尘污染。
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| 关 键 词： | 北京 大气污染物 质量浓度 沙尘天气 沙尘暴 浮尘 扬沙 沙尘污染 降尘 颗粒物污染 环境监测 |
| 修稿时间： | 2002-10-20 |
DIFFERENCE OF AIR POLLUTION DURING THE DUSTSTORM PROCESS IN BEIJING |
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| Fang Xiuqi ) Li Lingjun ) Xie Yun ). DIFFERENCE OF AIR POLLUTION DURING THE DUSTSTORM PROCESS IN BEIJING[J]. Journal of Beijing Normal University(Natural Science), 2003, 39(3): 407-411 |
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| Authors: | Fang Xiuqi ) Li Lingjun ) Xie Yun ) |
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| Affiliation: | Fang Xiuqi 1) Li Lingjun 2) Xie Yun 1) |
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| Abstract: | The objective of this paper is to study the difference of air pollution before and after a duststorm event. The results show that duststorm events occurring in Beijing are caused mainly by Mongolia low. There are two different kinds of air pollution in Beijing during a duststorm process. Before a duststorm, chemical air pollutants are in high concentration due to temperature inversion. At the beginning of a duststorm when dust has not come yet, air quality is improved because strong wind blows chemical pollutant like SO 2, NO 2 away, and their concentration is decreased. During the duststorm when dust comes, concentration of PM 10 is increased but atmospheric visibility is decreased. It is typical dust air pollution. |
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| Keywords: | duststorm air pollution Beijing |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
