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珠三角臭氧重污染天气的气象条件研究 预览

Analysis of meteorological factors during ozone pollution days in Pearl River Delta Region from 2015一2016
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摘要 利用2015—2016年珠三角地区AQI和臭氧(O3)等环保监测数据,以及气温、风速、风向、气压、相对湿度等气象观测数据,选取O3重污染日,分析了气象因子的时空分布特征及与其O3质量浓度的关系.结果表明:发生O3重污染天气时,珠三角地区O3质量浓度呈现"两边低中间高"的分布特征.O3重污染日的O3质量浓度分布型可以被划分为3种类型:北高南低型、南高北低型和中部型.24h合成风可以反映连续时间内的水平风扩散条件,合成风的弱切变或弯曲的区域与O3质量浓度高值区域有较好的对应关系.O3高质量浓度的区域对应了高温低湿的条件,O3质量浓度与气温呈多项式拟合关系,R2为0.33,与相对湿度呈线性拟合关系,R^2达到0.55. Surface ozone pollution is becoming more serious in the Pearl River Delta(PRD)region in recent years.Environmental monitoring data(AQI and O3 concentrations)and meteorological observations(temperature,wind speed,wind direction,atmospheric pressure,and relative humidity)from 2015-2016 in PRD were used to analyze temporal and spatial distribution of meteorological factors and relationships between meteorological elements and ozone concentrations.It was found that when ozone pollution occurred,the highest ozone concentration was in the middle of PRD.Ozone pollution could be divided into three categories:with high concentration in the north(HN),in the south(HS),or in the middle(HM).Twenty four hour resultant wind could reflect wind diffusion.More specifically,weak wind shear or curve was found to be well related to high ozone concentration area.High ozone concentration area corresponded to high temperature and low relative humidity.Ozone concentration was found to have a polynomial fitting relationship with temperature(R^2=0.33),and a linear fitting relationship with relative humidity(R^2=0.55).When high,moderate and low ozone concentration occurred,corresponding temperature and relative humidity indicated good internal distributions in the region.
作者 夏冬 陈均 罗栩羽 陈慧忠 李韵婕 王东海 XIA Dong;CHEN Jun;LUO Xuyu;CHEN Huizhong;LI Yunjie;WANG Donghai(Zhuhai Public Meteorological Service Center,519000,Zhuhai,Guangdong China;Dongguan Meteorological Bureau,523000,Dongguan,Guangdong,China;Zhuhai Meteorological Bureau,519000,Zhuhai,Guangdong China;Guangdong Province Key Laboratory for Climate Change and Natural Disaster,Studies School of Atmospheric,Sciences Sun Yat-Sen University,510275,Guangzhou,Guangdong,China;Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai),519028 Zhuhai,Guangdong,China)
出处 《北京师范大学学报:自然科学版》 CAS CSCD 北大核心 2019年第4期505-512,共8页 Journal of Beijing Normal University(Natural Science)
基金 国家自然科学基金国际(地区)合作与交流资助项目(41861164027)
关键词 大气环境 臭氧 气象因子 珠三角地区 atmospheric environment ozone meteorological elements the Pearl River Delta region
作者简介 通信作者:夏冬,e-mail:584131440@163.com。
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