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

【Author】 Liu Yuche;Wang Dongdong;Zhao Hujia;Zhao Lingchen;Wang Shu;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】 2017年6月一次重污染过程,用WRF模式模拟其温度场、风场、湿度场,用HYPSLIT模拟重污染过程的后向轨迹分析其重污染的源向,利用探空数据画出逆温曲线、干绝热曲线分析其混合层高度的变化。结果表明:1)O3是沈阳夏季污染的主要污染物,光化学污染是夏季污染的主要形式;2)地面温度越高,沈阳夏季越容易污染,地面温度越低,越不容易污染;3)风向是西南风时易发生污染;4)风速越小越容易发生污染,风速越大越不容易发生污染;5)地面湿度和夏季空气污染是负相关的关系,地面相对湿度越大空气越好,地面相对湿度越小夏季空气质量越差;6)夏季主要是光化学污染,重污染过程近地面逆温较为明显,混合层高度很低,这种边界层条件非常易于造成污染物颗粒聚集而不易扩散;7)能看出污染空气主要来自西南方,重污染前主要为北方气团,重污染后主要为南方气团。更多还原

【Abstract】 In June 2017, a heavy pollution process was conducted. The temperature field, wind field and humidity field were simulated by WRF model, the backward trajectory of the heavy pollution process was simulated by HYPSLIT, the source direction of the heavy pollution was analyzed, and the inversion curve and dry insulation curve were drawn by using radiosonde data to analyze the change of the height of the mixing layer,The conclusions are as follows: 1) O₃summer pollution in Shenyang, and photochemical pollution is the main form of summer pollution. 2) The higher the ground temperature, the easier it is to pollute in Shenyang in summer, and the lower the ground temperature, the less likely it is to pollute in Shenyang in summer. 3)When the wind direction is southwest wind, pollution is easy to occur. 4)The smaller the wind speed, the more likely it is to be polluted, and the larger the wind speed, the less likely it is to be polluted from the north before heavy pollution, and mainly from the south after heavy pollution. wind speed in summer. Maybe the wind speed in summer is very small, so there is no 5) There is a negative correlation between ground humidity and air pollution in summer, the lower the relative humidity, the worse the air quality in summer. 6)Photochemical pollution is the main pollution in summer. The near-surface temperature inversion of heavy pollution is obvious and the mixed layer height is very low, it can be seen that the polluted air mainly comes from the southwest, mainly 7)It can be seen that the polluted air mainly comes from the southwest, mainly from the north air mass before heavy pollution and mainly from the South air mass after heavy pollution.更多还原