杭州市近地面大气臭氧浓度变化特征分析

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摘要利用2012~2016年杭州市近地面臭氧（O₃）的连续观测资料以及气象数据，分析了杭州市近地面O₃浓度的变化特征及其与气象要素的关系.结果表明，近年来杭州市O₃年平均浓度较10年前升高10 μg/m³左右，光化学污染形势日趋严重.O₃浓度冬季较低，其余季节均较高，日平均浓度大于100μg/m³主要分布在4~10月.O₃浓度日变化呈单峰型分布，5：00~7：00出现最低值，14：00出现峰值，超标时段主要出现在11：00~18：00.O₃浓度变化与紫外辐射、温度呈正相关关系，与相对湿度呈负相关关系.紫外辐射大于0.02MJ/m²、气温高于20℃、相对湿度低于70%时，O₃浓度会出现超标情况.风向风速对O₃浓度有一定影响，当风向为北风或偏北风时，O₃浓度较低；当风向为东风或偏东风时，O₃浓度较高，说明影响杭州O₃浓度升高的污染源也主要来自东部，南部和北部地区较少.

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	齐冰
	牛彧文
	杜荣光
	于之锋
	应方
	徐宏辉
	洪盛茂
	杨焕强

关键词 ：臭氧, 变化特征, 气象要素, 杭州

Abstract：The characteristics of surface ozone concentration and its relationship with meteorology were analyzed by continuous observation from 2012 to 2016in urban site of Hangzhou. The annual averaged concentration of ozone in Hangzhou increased about 10μg/m³ over the past ten years. The situation of photochemical pollution became worse. The seasonal variation of ozone concentration was lower in winter and higher in spring, summer and autumn. The daily averaged ozone concentration over 100μg/m³ was mainly scattered from April to October. The daily variation of ozone concentration showed unimodal distribution, with a minimum value at 05:00~07:00 and a maximum value at 14:00. The hourly averaged ozone concentration over standard was mainly appeared at 11:00~18:00. The ozone concentration had a positive correlation with ultraviolet radiation and temperature, and a negative correlation with relative humidity. The ozone concentration was in excessive condition while the ultraviolet radiation was higher than 0.02MJ/m², the temperature was higher than 20℃ and the relative humidity was lower than 70%. The ozone concentration was influenced by wind direction and wind speed to some extent. The lower ozone concentration was found under north or northerly wind while higher ozone concentration was observed under east or easterly wind. The pollution sources which elevated ozone concentration came mainly from the east regions of Hangzhou, and less from the south and north regions.

Key words： ozone variation characteristic meteorological factors Hangzhou urban

收稿日期: 2016-06-20

PACS:

X515

基金资助:国家自然科学资金资助项目（41305118）；浙江省自然科学基金项目（LY16D010006）；杭州市社会发展科研专项（20150533B17）；浙江省气象局创新团队项目（2014ZD04-2）

通讯作者: 于之锋,讲师,zhifeng_yu@163.com E-mail: zhifeng_yu@163.com

作者简介: 齐冰(1981-),男,江西南昌人,高级工程师,硕士,主要从事大气物理与大气环境研究.发表论文10余篇.

引用本文:

齐冰, 牛彧文, 杜荣光, 于之锋, 应方, 徐宏辉, 洪盛茂, 杨焕强. 杭州市近地面大气臭氧浓度变化特征分析[J]. 中国环境科学, 2017, 37(2): 443-451. QI Bing, NIU Yu-wen, DU Rong-guang, YU Zhi-feng, YING Fang, XU Hong-hui, HONG Sheng-mao, YANG Huan-qiang. Characteristics of surface ozone concentration in urban site of Hangzhou. CHINA ENVIRONMENTAL SCIENCECE, 2017, 37(2): 443-451.

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http://manu36.magtech.com.cn/Jweb_zghjkx/CN/ 或 http://manu36.magtech.com.cn/Jweb_zghjkx/CN/Y2017/V37/I2/443

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