摘要
利用珠海地区两个代表性环境空气质量国控站(吉大站、斗门站)2013—2016年连续4年的逐时臭氧(O_3)浓度监测资料和离两个国控站最近的基本气象站(珠海气象站、斗门气象站)同期逐时气象资料,综合应用统计分析、个例剖析、HYSPLIT后向轨迹聚类分析和潜在源贡献因子分析(PSCF)方法,研究了珠海地区臭氧浓度特征及其与气象因素的关系.结果表明:①干季珠海市O_3浓度最高且超标天数最多,高温低湿条件有利于O_3的形成;②位于内陆的斗门站O_3污染浓度、污染频率明显高于位于沿海的吉大站;③风场对珠海地区O_3浓度分布有重要影响,东北风或偏北风风速为3～4 m·s^(-1)时下风向珠海地区O_3浓度最高;④10月O_3重污染个例剖析表明,区域输送对珠海地区O_3污染有重要影响.HYSPLIT后向轨迹聚类分析表明,影响珠海地区O_3污染的气团来源中受广东中东部气流影响时污染最重,与潜在源贡献因子分析(PSCF)表明的该污染个例的污染潜在源区主要为广东中东部的东莞、广州增城、河源及以北地区的结论一致.
Based on the hourly ozone(O3)concentrations and meteorological variables observed at a coastal location(Jida)and an inland location(Doumen),this study investigated the O3 pollution characteristics and their relationships with meteorological factors in Zhuhai via an integrated application of statistical analysis,case analysis,HYSPLIT back trajectory analysis and potential source contribution factor analysis(PSCF)method.The results indicated that①the high temperature and low humidity conditions in dry season are favorable for the O3 formation,causing a higher O3 concentration and pollution frequency in Zhuhai;②the O3 concentration and pollution frequency are significantly higher at the inland site of Doumen;③wind field exerts important influence on the O3 distribution in Zhuhai while the highest O3 concentrations usually occur in the downward area when northeast wind or northerly wind prevailed with a wind speed of 3~4 m·s^-1;④the analysis of O3 heavy pollution case in October shows that the regional transport has large contribution to O3 pollution in Zhuhai.Clustering analysis of HYSPLIT back trajectories shows that the air mass source affecting the O3 pollution in Zhuhai region is the most polluted when it is affected by the air flow from the middle and eastern part of Guangdong Province,which is consistent with the results of the analysis of potential source contribution factor analysis(PSCF)that the potential sources of this pollution are distributed in the central-eastern Guangdong(e.g.,Donguan,Zengcheng and Heyuan)and areas in the north of Heyuan.
作者
周学思
廖志恒
王萌
陈静林
董娟
赵新锋
范绍佳
ZHOU Xuesi;LIAO Zhiheng;WANG Meng;CHEN Jinglin;DONG Juan;ZHAO Xinfeng;FAN Shaojia(School of Atmospheric Science,Sun Yat-sen University,Zhuhai 519000;Zhuhai Municipal Environmental Monitoring Station,Zhuhai 519000;Zhuhai Meteorological Bureau,Zhuhai 519000)
出处
《环境科学学报》
CAS
CSCD
北大核心
2019年第1期143-153,共11页
Acta Scientiae Circumstantiae
基金
国家重点研发计划课题(No.2017YFC0209606
2016YFC0203305)
国家自然科学基金重点项目(No.41630422)
关键词
臭氧特征
气象影响
后向轨迹
潜在源区
珠海
characteristics of ozone
meteorological influence
back trajectory
potential source area
Zhuhai
