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| 南京市区PM2.5扩散与气象条件的关系 |
| Relationship of the Diffusion of PM2.5and Meteorological Conditions in Nanjing Urban Area |
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| DOI： |
| 中文关键词: PM2.5 气象条件 扩散 南京市区 |
| 英文关键词: PM2.5 Meteorological condition Diffusion Nanjing urban area |
| 基金项目:南京市气象局科研基金资助项目（NJ201402） |
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| 中文摘要: |
| 使用2013年PM2.5监测数据和南京气候基准站的气象资料，分析PM2.5扩散与气象条件的关系。结果表明：PM2.5质量浓度与降水量有良好的负相关关系；较大混合层厚度和不稳定的大气层结有利于PM2.5质量浓度的降低；在南京地区，PM2.5质量浓度在东北风向和西南风下相对较低，而且与风速也有较好的负相关性；较高的湿度不利于PM2.5质量浓度的降低，并会影响能见度，60%～70%的湿度区间是PM2.5污染加重的转折点。 |
| 英文摘要: |
| In this paper, the relationship of the diffusion of PM2.5 and meteorological conditions in Nanjing urban area was studied by PM2.5 data and the meteorological data from the climatological stations in Nanjing of 2013. The results indicated that the concentration of PM2.5 and precipitation had a good negative correlation. The thickness of the mixing layer and the unstable atmosphere were both beneficial to reduce the concentration of PM2.5. In Nanjing urban area, the concentration of PM2.5 is relatively lower when the city is in the northeast wind or the southwest wind, and also it had a negative correlation with the wind speed. A higher relative humidity was bad for the reduction of PM2.5 and would affect the visibility, and the relative humidity in the interval between 60% and 70% was a break point of the pollution of PM2.5 aggravating. |
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