气象因子和海风对秦皇岛市臭氧污染的影响

利用2017年9月至2019年9月秦皇岛市环境监测站污染物浓度资料以及秦皇岛市国家基本气象站和浮标站的气象数据,统计分析了秦皇岛市O3污染特征以及气象因子和海风对秦皇岛市O3污染的影响.结果表明:秦皇岛市O3污染月变化特征表现为以5—6月和9月最为严重,10—12月和1—2月则无O3超标天气出现.O3污染的日变化特征表...

The influences of meteorological factors and sea breeze on ozone pollution in Qinhuangdao

Based on the data of air pollution concentration from Qinhuangdao environmental monitoring station, the meteorological data from Qinhuangdao meteorological observation station and buoy station, the characteristics of O₃ pollution and its response to meteorological factors and the sea breeze were researched.Results show that the monthly variation of O₃ pollution in Qinhuangdao is characterized by the most serious in May-June and September, and no day with O₃ exceeding the standard in October-December and January-February.The diurnal variation of O₃ is unimodal distribution i.e.the O₃ concentration is highest in the afternoon and lowest in the morning.In general, the key meteorological factors triggering O₃ pollution in Qinhuangdao are solar radiation of 850-950 W·m^-2, daily maximum temperature over 32 ℃, relative humidity of 50%-60%, no precipitation, and SW or SSW wind dominant respectively.The sea breeze in Qinhuangdao is the most common phenomenon from June to August, with a frequency of over 50%.Usually, the sea breeze starts to appear at 8-10 a.m., reaches its maximum at noon-3 p.m., and weakens and is over after the evening.The average concentrations of O₃-8h on days with the sea breeze from May to June and August to September are higher than those on days without sea breeze, and the monthly average concentrations of O₃-8h on days with the sea breeze in May, June, and September are as high as 155-166 μg·m^-3.All these indicate that the circulation of sea-land breeze plays a role in aggravating O₃ pollution in Qinhuangdao.