Characteristics of urban ozone level

Characteristics of urban ozone level in Hong kong

The long term trend of ozone level in Hong Kong has been investigated. One of the characteristics of ozone level in Hong Kong is the existence of autumn maximum and summer minimum. Observations of the diurnal variation of ozone level have been made in different area categories. There are early morning peak and afternoon peak occurred in the diurnal variation, which are different from some metropolitans where only an afternoon peak is observed. A negative correlation coefficient was found between monthly ozone level with nitric oxide level. On the contrary, there is a positive correlation between ozone and nitrogen dioxide. The positive correlation coefficient between nitric oxide and nitrogen dioxide shows that the total amount of nitric oxide emitted from a series of moving and fixed sources greatly exceeded the stoichiometric amount of ozone formed from chemical reactions of precursors and long distance transportation.

作 者： D.Y.C.Leung D.N.Zhang   作者单位： D.Y.C.Leung(Department of Mechanical Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong, China)

D.N.Zhang(Research Institute of Environmental Engineering, East China University of Science and Technology,) 

刊 名： 环境科学学报(英文版)  ISTIC SCI 英文刊名： JOURNAL ENVIRONMENTAL SCIENCES  年，卷(期)： 2001 13(1)  分类号： X131.1  关键词：  

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