秦皇岛市某县区臭氧污染特征及影响因素分析

Characteristics and Influence Factors of Ozone Pollution in A County of Qinhuangdao

利用秦皇岛市某县区两个监测站点2019-2020年的监测数据,对区域内臭氧(O_(3))污染的时间分布特征进行研究,并综合考量颗粒物、前提物、气象因子等因素的影响。结果表明,该区域O_(3)超标现象主要集中在5-9月,具有明显的季节分布特征;2019、2020年O_(3)日浓度曲线呈单峰型变化趋势,峰值出现于16:00左右,谷值出现于6:00左右;NO_(2)、颗粒物PM 10、PM_(2.5)和O_(3)质量浓度日变化总体呈负相关;温度≧25℃,70%≦湿度(RH)<80%,风向为偏西风时,更易出现O_(3)浓度高值。

The monitoring data of two monitoring stations in a county of Qinhuangdao from 2015 to 2020 was used to study the time distribution characteristics of ozone pollution in the county.The effcets of particulate matter,precursors,and mereorological factors on ozone concentration were analyzed.The results showed that the pheomenon of O_(3)exceeding the standard mainly appeared from May to September and had obvious seasonal characteristics.Ozone diurnal variation from 2019 to 2020 showed single-peak type,the peak hour appeared at 16:00 and the bottom value hour appeared at 6:00.There was a negative correlation between NO_(2),particulate matter PM 10,PM_(2.5)and the daily variation of O_(3)mass concentration.O_(3)concentration and NO 2 concentration showed a good negative exponential function relationship.Temperayure≥25℃,70%relative humidity<80%,wind direction of west wind were prone to high ozone values.Affected by the high temperature.