珠海地区海陆风对臭氧污染的影响  

Understanding the impact of sea and land breezes on ozone pollution in the Pearl River Delta

作　　者：张亮 林洁萍 邵英贤 黄盛君 范绍佳 魏婉沛 董妍汝 李文淑 梁秀姬 ZHANG Liang;LIN Jieping;SHAO Yingxian;HUANG Shengjun;FAN Shaojia;WEI Wanpei;DONG Yanru;LI Wenshu;LIANG Xiuji(Zhuhai Ecology and Environment Monitoring Station of Guangdong Province,Zhuhai 519000;Guangzhou OnePoint Environmental Consultant Co.,Ltd.,Guangzhou 510220;School of Atmospheric Science,Sun Yat-sen University,Zhuhai 519000;Zhuhai Public Meteorological Service Center,Zhuhai 519000)

机构地区：[1]广东省珠海生态环境监测站,珠海519000 [2]壹点环境科技(广州)有限公司,广州510220 [3]中山大学大气科学学院,珠海519000 [4]珠海市公共气象服务中心,珠海519000

出　　处：《环境科学学报》2024年第1期74-85,共12页Acta Scientiae Circumstantiae

基　　金：广东省科技计划项目(科技创新平台类)(No.2019B121201002)。

摘　　要：近年来珠三角夏秋季大气臭氧污染愈发严重并受到广泛关注.每年9—10月珠三角会有多个城市出现臭氧连续超标,呈现污染时间长、污染范围广的特点,2022年情况尤为突出.利用2016—2022年珠海市气象观测数据统计了该地区的海陆风发生规律,结合内陆站点和沿海站点空气质量监测数据,分析了海陆风对臭氧的影响.结果表明:夜间陆风将内地高污染气团向沿海方向传输,使夜间珠海地区VOCs增加及一部分的污染气团吹至海面,第二日上午开始海风将前一日夜间高污染气团从海面吹回陆地,到下午海风气团才逐渐变的较为清洁.整体来看,海陆风影响时本地VOCs增加明显,上午臭氧的增长速度较无海陆风时更快.O_(x)原位生成速率平均值和最大小时生成速率平均值均高于无海陆风日.珠海海陆风日海风与陆风影响臭氧生成前十OFP物种基本一致,与珠三角其他城市来源相似.In recent years,the severity of atmospheric ozone pollution during the summer and autumn seasons in the Pearl River Delta(PRD)has garnered increasing attention.Consistently from September to October each year,multiple cities in the PRD region have faced prolonged and widespread ozone pollution and the exceedances of established ozone pollution standards.The situation was particularly notable in 2022.To gain insights into this issue,we analyzed meteorological data from Zhuhai City spanning the period from 2016 to 2022,aiming to characterize the patterns of sea and land breezes.Additionally,using air quality monitoring data from both inland and coastal stations,we investigated the influence of these winds on ozone pollution in the region.Our findings indicate that during nighttime,the land breeze transports high-pollution air masses from inland areas to the coastal regions,resulting in an elevation of volatile organic compounds(VOCs)in the coastal cities.Furthermore,a portion of the polluted air mass is carried out to sea.Subsequently,the following morning's sea breeze carries back the high-pollution air mass from the sea surface to the land.As the day progresses,the air quality gradually improves in Zhuhai.Overall,the presence of sea and land breezes leads to a significant increase in local VOCs,with ozone exhibiting a faster growth rate in the morning compared to periods without these winds.The in-situ generation rate and maximum hourly generation rate of O_(x)are consistently higher on days when sea and land breezes are present.Moreover,the impact of sea and land breezes on the top ten ozone-forming potential(OFP)species in Zhuhai aligns with observations from other cities in the PRD region.

关 键 词：海陆风 影响 臭氧(O_(3)) 生成速率 珠海 

分 类 号：X51[环境科学与工程—环境工程]