| 余灏,黄雪梅,易明建.宣城市一次短时细颗粒物污染成因分析[J].安徽建筑大学学报,2021,29(6):20-26 |
| 宣城市一次短时细颗粒物污染成因分析 |
| Cause Analysis of A Short-Term Fine Particle Pollution in Xuancheng City |
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| DOI： |
| 中文关键词: 空气污染模拟 PM2.5 WRF-CAMQ |
| 英文关键词: air pollution simulation PM2.5 WRF-CAMQ |
| 基金项目:国家重点研发计划项目（2018YFC0213806）；安徽省重点研发计划项目（1804a0802196）；安徽建筑大学科研基金项目（2020QDZ31） |
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| 中文摘要: |
| 2021 年 1 月 1-2 日，宣城市出现特定时段细颗粒物（PM2.5）浓度突然升高、短时间内又快速下降的特殊污染现象。通过对比分析不同空间尺度范围内监测数据的关联变化，并利用空气质量模型模拟污染过程进行研究，结果表明：研究区域位于一个天气尺度的污染气团西南边界地带，随气团推移运行，该区域反复进入和偏离污染区，是 PM2.5 浓度出现快速升高和下降特征的主要原因。同时，研究区域 PM2.5 峰值出现的时间符合 2020 年 12 月以来 PM2.5 日变化的一般规律，但是 PM2.5 浓度变化幅度差异显著。因此，这是一次较为特殊的 PM2.5 污染过程。在 PM2.5 浓度峰值时段遭遇外部污染气团过境，是 PM2.5 浓度短时变化幅度大的原因，这说明了该区域细颗粒物污染成因复杂，为科学制定相应防治措施提供了理论依据。 |
| 英文摘要: |
| On January 1-2，2021，a special pollution phenomenon of sudden fluctuation in fine particulate matter（PM2.5）concentration occurred in Xuancheng City. The authors analyze the changes of monitoring data in different spaces and simulate thepollution process with air quality models. The results show that the study area，located in the southwest boundary of a synoptic scalepolluted air mass，comes in and out of the pollution zone several times as the air mass moving，which is the main reason for the rapidchanges of PM2.5 concentrations. The peak time of PM2.5 in the study area is consistent with the pattern of daily variation of PM2.5 sinceDecember 2020，but the magnitude of PM2.5 concentration varies significantly. It’s concluded that，this is a relatively specific PM2.5pollution process. The encounter of polluted air mass transit during the peak time of PM2.5 concentration is the reason for the suddenfluctuation of PM2.5 concentration，which illustrates the complex causes of fine particulate pollution in the region，and provides atheoretical basis for scientific pollution prevention and control. |
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