Please use this identifier to cite or link to this item: http://repository.vnu.edu.vn/handle/11126/4504
Title: Photochemical smog introduction and episode selection for the ground-level ozone in Hanoi, Vietnam
Authors: Đàm, Duy Ân
Keywords: Ozone
Chất gây ô nhiễm
Khí quyển
Hà Nội
Issue Date: 2008
Publisher: Đại học Quốc gia Hà Nội
Citation: p. 169-175
Abstract: Ozone (O3) is a secondary pollutant formed in the atmosphere throughout a complex non-linear chemical reaction involving two classes of precursors: the reactive volatile organic compounds (VOCs) and the oxides of nitrogen (NOx) in the presence of sunlight. The rapid urbanization and industrialization in Vietnam have brought about high air pollutant emissions including the O3 precursors. Ground level O3 may already be high in large cities like Hanoi and Ho Chi Minh City. The O3 episode is very important for scene of view of photochemical smog in Hanoi. Ozone episodes are selected on the days which have a high concentration that lasts for at least two days time. During the episode selection, ozone concentrations larger than 46ppb were observed at two stations (the Lang and Lac Long Quan stations) in March. The maximum value of 74ppb was measured at the Lang station at 14:00 on March 3. This episode was observed in a common meteorological condition for this time of the year.
URI: http://repository.vnu.edu.vn/handle/11126/4504
Appears in Collections:Chuyên san Khoa học trái đất và Môi trường

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