深圳大运会期间一次光化学污染事件成因分析  

Causes Analysis of a Photochemical Pollution Event during Shenzhen Universiade

作　　者：张立杰[1] 张丽[1] 李磊[1,2] 刘爱明[1] 吴兑[3] 

机构地区：[1]深圳市气象局,深圳市国家气候观象台,广东深圳518040 [2]深圳市城市规划与决策仿真重点实验室,广东深圳518055 [3]中国气象局广州热带海洋气象研究所,广东广州510080

出　　处：《环境监控与预警》2013年第2期10-14,共5页Environmental Monitoring and Forewarning

基　　金：国家自然科学基金(51278308;51008002);广东省气象局气象科技项目(201028;2011B14;2012B29);亚热带建筑科学国家重点实验室开放课题(2011KB20)

摘　　要：对深圳大运会期间8月20日发生的一次光化学污染过程进行分析。此次过程中,处于工业区的石岩大气成分站测得O3浓度小时平均最大值为213.4μɡ/m3,超过国家环境空气质量二级标准限值(200μɡ/m3),出现时间在当日13:00～14:00时。与处于城区的竹子林站和郊区的西涌站污染物浓度进行对比分析得知,此次光化学污染的主要特点是局地性较强,持续时间较短,影响范围小。同步的风速、风向、温度、相对湿度及紫外辐射等气象要素分析表明,此次光化学污染事件与气象条件关系非常紧密,当日天气晴朗、日照强烈、温度高、相对湿度适中,有利于光化学反应的发生,且不利的风向条件使得来自上风向城区的污染物易于累积。On August 20 during Shenzhen Universiade, a photochemical pollution occurred. The maximum hourly concentration of 03 reached 213.4 μg/m3 at Shiyan Atmospheric Composition Station （ACS） located in an industrial area between 13：00 - 14：00 during the process, which exceeded Grade II limitation （200 μg/m3 ） of the National Environmental Air Quality Standard. A com- parison analysis on the data from Shiyan sites and other two sites, namely, Zhuzilin Station in urban area and Xiehong Station in ru- ral area shows that the photochemical pollution is limited in a local area, and the lasting period is relatively short, and only a small area was influenced by the pollution event. The analyzed meteorological data （wind speed, wind direction, temperature, humidity and ultraviolet radiation） shows that this event has a close relationship with weather condition, and the strong sunshine, high tem- perature and moderate humidity are good for the photochemical reaction, while adverse wind direction could make the pollutions that comes from the upwind direction easily accumulate.

关 键 词：深圳大运会 O3浓度 光化学污染 气象成因 

分 类 号：X502[环境科学与工程—环境工程]