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| 2015年2月广西典型空气重污染过程及成因分析 |
| Process and Cause Analysis of Heavy Pollution Event in Guangxi February 2015 |
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| DOI： |
| 中文关键词: PM2.5 空气重污染 成因分析 区域传输 广西 |
| 英文关键词: PM2.5 Heavy air pollution Cause analysis Regional transportation Guangxi |
| 基金项目:广西科协调查研究基金资助项目（桂科协［2014］B-03） |
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| 中文摘要: |
| 基于环境空气质量监测数据和气象观测数据，分析2015年2月5日—14日广西典型空气重污染过程及形成原因。结果表明：重污染期间PM2.5平均质量浓度为118 μg/m3，超标0.57倍，日均质量浓度超标率为92.1%；与2014年1月重污染过程相比，此次污染过程持续时间减短、极端污染天气有所缓解、PM2.5为首要污染物的比例增大。气象条件和气流后向轨迹分析表明，大气层结稳定、近地层逆温明显、风速小、相对湿度大等静稳天气是此次污染过程形成的重要原因，广西本地排放污染物及区域污染传输相叠加是造成重污染的根本原因。 |
| 英文摘要: |
| A typical air pollution event occurring from February 5th to 14th, 2015 in Guangxi was analyzed based on ambient air quality monitoring data and meteorological data. The results showed that the average concentration of PM2.5 was 118 μg/m3, with 0.57 times exceeding standard limit. Daily mean concentration was of 92.1% exceeding standard rate. Compared with the heavy pollution in January 2014, this pollution process was shorter, less extreme pollution weather and more ratios of PM2.5 as the major pollutant. According to the meteorological condition and NOAA Back Trajectory Model (HYSPLIT 4), stable atmospheric stratification and inversion layer, as well as low wind speed and high relative humidity were the main causes of heavy air pollution, and the local atmospheric pollutant emission and regional transmission were the root causes. |
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