苏南城市一次典型臭氧污染过程分析

ANALYSIS OF A TYPICAL OZONE POLLUTION PROCESS IN SOUTHERN JIANGSU

2022年4月7—12日,江苏省苏南城市群经历了一次区域性,连续性的臭氧污染过程,利用该时段苏南城市群连续性污染过程中O_(3)、NO_(2)、VOCs及气象数据进行分析。结果表明:此次污染过程以东南向西北方向存在明显的传输通道;污染过程率先生成于无锡市,污染期间无锡市风速整体偏小,温度偏高,相对湿度低,气象条件有利于O_(3)生成;无锡市与苏州市污染过程以本地生成为主,无锡市主要贡献源为交通排放源,苏州市为交通排放源、工业及溶剂使用源为主。

From April 7 to 12,2022,the Southern Jiangsu city cluster in Jiangsu Province experienced a regional and continuous process of ozone pollution.The O_(3),NO_(2),VOCs and meteorological data in the continuous pollution process of southern Jiangsu urban agglomeration from April 7 to 12,2022 were used for analysis。The results show that there are obvious transmission channels from east to south to northwest during the pollution process;The pollution process was first generated in Wuxi City.During the pollution period,the wind speed in Wuxi city was relatively small,the temperature was high,and the relative humidity was low.The meteorological conditions were favorable for ozone generation;The pollution process of Wuxi and Suzhou is mainly generated locally.The main contribution source of Wuxi is traffic emission source,and the main contribution source of Suzhou is traffic emission source,industry and solvent use source.