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大气科学  2011 

污染气溶胶对山西一次降水过程影响的数值模拟

DOI: 10.3878/j.issn.1006-9895.2011.02.04

Keywords: 中尺度数值模拟,气溶胶,WRF(WeatherResearchandForecasting)模式,微物理过程

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Abstract:

利用耦合Morrision双参数物理方案的WRF(WeatherResearchandForecasting)中尺度数值模式,对发生在2007年6月13日山西地区的一次强降水过程进行了模拟,并对清洁和污染背景下气溶胶对云微物理结构和降水变化的影响进行了敏感性试验和对比分析。结果显示:污染背景下,降水区域没有明显变化,中心强度变强,网格平均降水量比清洁背景少0.8%;雪和霰是雨水的主要来源,高浓度气溶胶背景下,前期暖云降水减弱,后期大量雪粒子与云中云滴和雨滴碰并增长,造成降水增强。

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