【作者】 刘玉彻； 王东东； 赵胡笳； 赵凌尘； 苏航； 邹旭东； 汪宏宇； 张云海；

【Author】 Liu Yuche;Wang Dongdong;Zhao Hujia;Zhao Lingchen;Su Hang;Zou Xudong;Wang Hongyu;Zhang Yunhai;Shenyang Institute of Atmospheric Environment,China Meteorological Administration;Liaoning Meteorological Equipment Support Center;Shenyang Central Meteorological Station;

【机构】 中国气象局沈阳大气环境研究所； 辽宁省气象装备保障中心； 沈阳中心气象台；

【摘要】 对2014年10月28日—2014年11月4日沈阳地区出现了这一空气重污染过程进行分析。基于常规气象观测资料注意到这次过程与逆温层的形成和低风速不利于污染扩散有密切的联系。沈阳为东风时较易污染,为西风时,不易污染。空气的清洁度指数和平均地温为正相关趋势,而空气污染指数和当时段的温度呈正相关。后向轨迹模式的计算结果表明,来自沈阳地区的东面、南面和西南面的气团输送与重污染有着密切的联系。进一步利用WRF-CHM模式对这次污染出现过程的气象要素和表征空气污染的PM_2.5、PM₁₀、SO₂、NO₂、O₃和CO进行了模拟,发现模式能准确地模拟出重空气污染过程中的近地面的温、湿、压、风变化,但是模拟化学组分的浓度变化过程中,结果与实测值相比仍有较大的误差,模拟的浓度值基本上低于实际观测结果,表明了在空气重污染过程中的局限性。更多还原

【Abstract】 This paper analyzes the heavy air pollution process in Shenyang from October 28, 2014 to November 2, 2014.Based on the conventional meteorological observation data, it is noted that this process is closely related to the formation of inversion layer and low wind speed is not conducive to pollution diffusion. Shenyang is easy to pollute when it is east wind, but not when it is west wind. There is a positive correlation between air cleanliness index and average ground temperature, while there is a positive correlation between air pollution index and temperature at that time. The calculation results of backward trajectory model show that the air mass transportation from the East, South and southwest of Shenyang area is closely related to heavy pollution. Furthermore, the wrf-chm model was used to simulate the meteorological elements and PM_{2. 5}, PM₁₀, SO₂,NO₂, O₃and CO in the process of heavy air pollution. It was found that the wrf-chm model could accurately simulate the surface temperature, humidity, pressure and wind changes in the process of heavy air pollution, Compared with the measured value, the simulated concentration value is basically lower than the actual observation value, which indicates the limitation in the process of heavy air pollution.更多还原