摘要
利用衢州市区2018—2020年臭氧(O_(3))和前体物NO_(2)逐小时数据及对应的气象要素数据,分析了衢州市区O_(3)浓度变化特征及影响因素。结果表明:(1)2018—2020年衢州市区O_(3)质量浓度年均值为55.01~55.89μg/m^(3),呈逐年下降趋势,O_(3)污染最高只到轻度水平(占比4.2%)。(2)衢州市区O_(3)浓度春季(64.49μg/m^(3))>秋季(62.75μg/m^(3))>夏季(61.20μg/m^(3))>冬季(33.89μg/m^(3)),夏季O_(3)浓度偏低主要是因为衢州市区6—7月为梅雨季节。(3)衢州市区O_(3)浓度日变化呈单峰型分布,白天高,夜间低,最低值出现在6:00前后,最高值出现在15:00前后。(4)日照时数对O_(3)浓度影响最大,温度、降水量和相对湿度也有显著影响,前体物NO_(2)与O_(3)呈现明显的此消彼长关系。
Based on the hourly data of O_(3)and precursor NO_(2)in Quzhou urban from 2018 to 2020,as well as the meteorological elements in the corresponding period,the variation of O_(3)concentration and the influencing factors was analyzed.Results showed that:(1)from 2018 to 2020,the annual O_(3)mass concentration in Quzhou urban was 55.01-55.89μg/m^(3),with a decreasing trend.The highest concentration of O_(3)was only up to the level of mild pollution,accounting for 4.2%.(2)The seasonal varation of O_(3)was spring(64.49μg/m^(3))>autumn(62.75μg/m^(3))>summer(61.20μg/m^(3))>winter(33.89μg/m^(3)).O_(3)in summer was a little bit low because it was plum rain season in June and July.(3)The diurnal variation was unimodal,lower during nighttime and higher during daytime,with the lowest value appearing around 6:00 and the highest value around 15:00.(4)Sunshine duration had the greatest impact on O_(3)concentration,and temperature,precipitation and relative humidity had significant impact,too.The precursor NO_(2)and O_(3)waned and waxed alternatively.
作者
张超
唐家翔
张金祥
徐宏辉
陆沅泉
ZHANG Chao;TANG Jiaxiang;ZHANG Jinxiang;XU Honghui;LU Yuanquan(Zhejiang Quzhou Meteorological Service Bureau,Quzhou Zhejiang 324000;Hainan Meteorological Observatory,Haikou Hainan 570203;Zhejiang Institute of Meteorological Science,Hangzhou Zhejiang 310008;Zhejiang Quzhou Ecological Environment Monitoring Center,Quzhou Zhejiang 324000)
出处
《环境污染与防治》
CAS
CSCD
北大核心
2023年第5期650-653,660,共5页
Environmental Pollution & Control
基金
国家重点研发计划项目(No.2016YFC0201900)。
关键词
臭氧
衢州市区
前体物
气象要素
O 3
Quzhou urban
precursor
meteorological elements
