惠州市夏秋季臭氧污染特征和典型污染过程  

Characteristics of ozone pollution and analysis of typical pollution processes in summer and autumn in Huizhou

作　　者：李明华[1] 姜帅[1] 甘泉 陈芳丽[1] 曾丹丹[1] 李娇娇 范绍佳[2] 祝薇[2] LI Minghua;JIANG Shuai;GAN Quan;CHEN Fangli;ZENG Dandan;LI Jiaojiao;FAN Shaojia;ZHU Wei(Huizhou Meteorological Bureau∥Huizhou Meteorological Observatory,Huizhou 516001,China;School of Atmospheric Sciences,Sun Yat-sen University,Guangzhou 510275,China)

机构地区：[1]惠州市气象局//惠州市气象台,广东惠州516001 [2]中山大学大气科学学院,广东广州510275

出　　处：《中山大学学报（自然科学版）》2018年第5期29-37,共9页Acta Scientiarum Naturalium Universitatis Sunyatseni

基　　金：国家重点研发计划大气专项课题(2016YFC0203305);国家自然科学基金重点项目(41630422);惠州市科技计划项目(2016G0412027);广东省气象局科研项目(GRMC2017M38)

摘　　要：利用广东省惠州市2013-2016年逐日和逐时的大气环境和气象观测资料,统计分析了惠州市夏秋季臭氧污染天气特征并分析了2013年7月12-13日臭氧污染过程。结果表明:(1)惠州市臭氧污染在一年四季均有出现,夏秋季(7-10月)年平均出现日数为12. 5d占年臭氧污染日的73. 5%,夏秋季臭氧污染日和臭氧中度污染日偏西风(WSW-W-WNW-NW)出现频率合计分别为44. 9%和74. 4%;气象条件分析表明惠州市夏秋季臭氧污染日大多出现在天气晴朗、日照充足、气温较高且为偏西风的天气下,夏秋季的天气气候特征使其成为臭氧污染的高发时段。(2)分析2013年7月12-13日惠州市臭氧中度污染过程发现,此次臭氧污染过程主要是受"苏力"外围下沉和偏西气流的共同影响,天气晴朗、日照充足、天气炎热非常有利于臭氧生成,地面和低空吹偏西风使惠州市处于珠三角城市群的下风向存在区域污染输送,同时垂直方向的下沉气流不利于污染物输送与扩散。Daily and hourly environmental and meteorological observation data in Huizhou of Guangdong Province during 2013-2016 were used to analyze the characteristics of ozone pollution in summer and autumn,and the ozone pollution process on July 12-13,2013 was analyzed.The results show that:①Ozone pollution appeared in all seasons with the average number of days of 12.5 in summer and autumn accounting for 73.5%of the annual ozone pollution days.The frequency of occurrence of westerly wind(WSW-W-WNW-NW)in summer and autumn during ozone pollution days and ozone moderate pollution days were 44.9%and 74.4%,respectively.In summer and autumn,most of the ozone pollution days occurred in weather conditions with hot and sunny weather,abundant sunshine and westerly wind.The climate characteristics in summer and autumn make a high-risk period for ozone pollution.②The ozone pollution process on July 12-13,2013 was mainly affected by the sinking of the“Su Li”and the westerly airflow.Hot and sunny weather and abundant sunshine were beneficial to ozone generation,the westerly winds on the ground and low-altitude make Huizhou in the downwind direction of the Pearl River Delta urban group,which led to regional pollution transport,while the vertical downdraft was not beneficial to pollutant transport and diffusion.

关 键 词：臭氧污染 夏秋季 气象条件 惠州市 

分 类 号：X515[环境科学与工程—环境工程]