• 关键词：臭氧特征  气象影响  后向轨迹  潜在源区  珠海

• 基金项目：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）

• 周学思
• 中山大学大气科学学院, 珠海 519000

• 廖志恒
• 中山大学大气科学学院, 珠海 519000

• 王萌
• 珠海市环境保护监测站, 珠海 519000

• 陈静林
• 珠海市气象局, 珠海 519000

• 董娟
• 珠海市气象局, 珠海 519000

• 赵新锋
• 珠海市环境保护监测站, 珠海 519000

• 范绍佳
• 中山大学大气科学学院, 珠海 519000

• 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（O₃）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O₃浓度最高且超标天数最多，高温低湿条件有利于O₃的形成；②位于内陆的斗门站O₃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O₃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O₃浓度最高；④10月O₃重污染个例剖析表明，区域输送对珠海地区O₃污染有重要影响.HYSPLIT后向轨迹聚类分析表明，影响珠海地区O₃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.

• Abstract：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 that ①the 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.

• Key words：characteristics of ozone  meteorological influence  back trajectory  potential source area  Zhuhai

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