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北京重污染事件中污染物输送轨迹模拟与分析

Keywords: 污染物输送轨迹,天气研究与预报,反气旋

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Abstract:

应用天气研究与预报(weatherresearchandforecasting,WRF)模式以及三维拉格朗日轨迹模式,以北京2003年10月18—22日出现一次重污染过程为例,研究反气旋系统控制下污染物的输送规律和移动路径,并分析环境和气象观测数据,阐述其成因.结果表明,当反气旋均压控制北京地区时,由于地方性环流起主导作用,污染物在反气旋控制区内徘徊,形成地方性风输送积累;当反气旋后部偏南风经过北京地区时,本地区累积的污染物向东北输送,最终在低压区汇聚垂直抬升,进入自由大气.

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