杭州市近地面大气臭氧浓度变化特征分析

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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

Received: 20 June 2016

PACS:

X515

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	Articles by authors
	QI Bing
	NIU Yu-wen
	DU Rong-guang
	YU Zhi-feng
	YING Fang
	XU Hong-hui
	HONG Sheng-mao
	YANG Huan-qiang

Cite this article:

QI Bing,NIU Yu-wen,DU Rong-guang等. Characteristics of surface ozone concentration in urban site of Hangzhou[J]. CHINA ENVIRONMENTAL SCIENCECE, 2017, 37(2): 443-451.

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http://manu36.magtech.com.cn/Jweb_zghjkx/EN/ OR http://manu36.magtech.com.cn/Jweb_zghjkx/EN/Y2017/V37/I2/443

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