Abstract: Based on the ozone mass concentration monitoring data near surface of Yinchuan and ground and upper meteorological observation data over Eurasian area from 2014 to 2016, the influence of meteorological conditions on ozone mass concentration was probed systematically from two aspects of meteorological factors and atmospheric circulation pattern. The results show that the ozone mass concentration near surface of Yinchuan was positively correlated with air temperature and negatively correlated with relative humidity, respectively. The vertical mixing played a dominant role when the wind speed was low, the ozone mass concentration was positively related with wind speed, while the horizontal diffusion played an important role when the wind speed was high, the ozone mass concentration was negatively related with wind speed. The southerly wind and wind direction towards Helan Mountain were conducive to the increase of ozone mass concentration. There were five circulation patterns on ozone polluting days in Yinchuan: trough and ridge pattern (44%), wide trough pattern (21%), subtropical high pattern (16%), northeast ridge pattern (8%) and others pattern (11%). The inversion layer near surface and sea-level low pressure system (or inverted trough) were important synoptic systems which caused ozone pollution in Yinchuan.

Key words: ozone mass concentration, meteorological factors, circulation patterns, synoptic systems

摘要： 利用2014—2016年银川市区近地面臭氧质量浓度观测资料、国家基准气候站银川站地面气象观测资料以及亚欧范围内地面、探空气象观测资料，从气象要素及环流形势两方面系统探讨气象条件对银川臭氧质量浓度的影响。结果表明：银川市区臭氧质量浓度与气温呈正相关，与相对湿度呈负相关；风力较小时垂直混合起主导作用，臭氧质量浓度与风力呈正相关，而风力较大时水平扩散起主导作用，臭氧质量浓度与风力呈负相关；偏南风及朝向贺兰山的风向，有利于臭氧浓度上升。造成银川市区臭氧污染的环流形势有槽脊型(44%)、宽广低槽型(21%)、副高型(16%)、东北高脊型(8%)和其他型(11%)，近地层逆温和海平面低压（或倒槽）是造成银川市区臭氧污染最重要的天气系统。

关键词: 臭氧质量浓度, 气象要素, 环流分型, 天气系统