台灣反應性軌跡模式之應用與發展及跨空品區現象分析(I)
Date Issued
2002-07-31
Date
2002-07-31
Author(s)
張能復
DOI
902621Z002014
Abstract
In this research, the cause of the ozone episodes in southern Taiwan by analyzing the
chemical、 physical and emissive effects were studied. In chemical effects, high
temperature(the daily mean temperature greater than 295K)、low cloudiness(the mean
cloudiness from 9A.M. to 4 P.M smaller than 0.3 ) and the great amount of daylight of
southern Taiwan provide the favorable environment for the photochemical production of
ozone. In the aspect of physical effect, including diffusion and convection, the decreasing
trend of diffusion of the ozone episode responds to the increasing trend of concentration of
ozone in November. But the ability of diffusion is not the main cause of the ozone episodes in
southern Taiwan.
By the analysis of backward trajectory and wind field, we could find that the prevailing
wind is not significant because of the eastern terrain barrier and the sea-land breeze
dominates in southern Taiwan. Because of light wind and sea-land breeze, there is a great
chance for precursors mostly from local pollution sources to accumulate in the atmospheric
boundary layer. In emissive effects, emissions of NOx are contributed by transportation andpoint sources (such as the power plants and petroleum refinery etc.); the emissions of NMHC
(Non-Methane Hydrocarbons) are contributed by the point sources and the metropolitan
pollution. In the conclusion, the weak wind (convection) plays the most important
Subjects
Ozone
backward trajectory
meteorological parameter
photochemical reaction
SDGs
Publisher
臺北市：國立臺灣大學環境工程學研究所
Type
report
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