包头市冬季特殊大气污染过程特征及成因讨论

Pollution characteristic of special air processes during the winter of Baotou and genesis discussed

通过对包头市2020年11月26日、12月4日、12月7日出现的3次特殊污染过程中的污染物浓度、天气形势场、气象参数对比分析,结果表明:1.过程具有短暂且空气质量波动显著的特征,5项污染物浓度出现同步升高,成因排除污染源的异常排放;2.3次过程形成的天气形势场接近,冷空气间歇期的环境容量变化为过程主要成因;3.气象条件变化加剧污染物浓度变化。

In order to understand pollution characeristics o£the special processes in the city of baotou,when happened in November 26December 4 and December 7,use the contents of pollution to summarizes the characteristics,as well as the weather situation field and meteorological parameters.The results showed that:(1)In the processes of the air quality is characterized by short and significant fluctuations,five pollutants concentration in synchronous rise,abnormal discharge is not a cause;(2)The weather situation of three processes are similar and all caused by environmental capacity change when the cold air were resting.(3)The change o£meteorological conditions will intensify pollutant concentration changes.