| 摘要: |
| 选取2016年12月昆山地区出现的1次持续性雾霾天气，对其雾、霾交替过程中所表现的阶段性特征和差异性进行了分析。结果表明:（1）不同程度的雾霾持续约5d，受北方污染气团入侵及冷空气、湿度等条件影响，雾、霾轮流交替出现。（2）与能见度呈现正相关的气象因素有气压和风速；呈现负相关的有相对湿度和露点温度；气温与能见度相关性不明显。（3）颗粒物浓度变化大致可分为前、后2个阶段，当相对湿度增大到接近饱和时，颗粒物并不能无限地吸湿增大，此时颗粒物浓度对能见度的影响可能已不是主要因素。（4）气团后向轨迹分析表明，前期污染物主要来自山西、河南一带，第2次污染气团主要来自西北方向。 |
| 关键词: 雾霾 颗粒物 气象因素 后向轨迹分析 昆山 |
| DOI：10.3969/j.issn.1674-6732.2023.05.006 |
| 分类号:X823 |
| 基金项目:江苏省重点研发计划项目（BE2019387）；苏州市科技计划项目（SS2019033）；昆山市社会发展科技计划项目（KS1459） |
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| A Phased Study on the Process of Production and Disappearance of a Continuous Smog in Winter in Kunshan |
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WANG Xiaochun， WU Ke， YU Taili， WU Junmei， WANG Ting
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Meteorological Bureau of Kunshan City， Kunshan， Jiangsu 215337， China
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| Abstract: |
| The continuous smoggy weather that occurred in the Kunshan area in December 2016 was selected as the study object，and the stage characteristics and differences in the fog and smog alternation process were studied and analyzed. The results showed that： (1) The degree of smog in this process lasted about 5 days. Affected by the intrusion of polluted air in the north and the conditions of cold air and humidity， fog smog turns alternately. (2) In this process， factors that positively correlated with visibility were atmospheric pressure and wind speed. Factors that showed negative correlation were relative humidity and dew point temperature. The correlation between temperature and visibility was not obvious. (3) The concentration of particulate matter in the smog process can be roughly divided into two stages. When the relative humidity in the air increases to near saturation， the particulate matter does not increase indefinitely. The effect of the concentration of particulate matter on visibility may not be a major factor at this time.(4) The analysis of the back trajectory of the air mass shows that the pre contaminants mainly came from Henan and Shanxi， and the second time the polluted air mass mainly came from the northwest. |
| Key words: Smog Particles Meteorological factors Backward trajectory analysis Kunshan |
