| Summary: | 碩士 === 國立臺灣大學 === 環境工程學研究所 === 98 === In these years, the pollution of ozone becomes worse in Yunlin,
Chiayi, Tainan (Y-C-T) area in Taiwan. This study used multivariate
statistical analysis and trajectory photochemical air quality model to
analyze the database of air quality from 1999 to 2009. The goal of this
study is to understand the pollution magnitude produced by sources of
pollution, and provided the basis for control of ozone.
This study investigated that the change on spatial and temporal
variations of (Y-C-T) area. The result indicated that the NOx and NMHC
had decreased in 1999 to 2009, but the ozone pollution was still worse in
fall.Tainan station due to the direction of the monsoon that cause more of
ozone hour station days. Factor scores above 2.5 is a useful index for
selection of ozone episodes. Compare with non-ozone episodes, the result
indicated that the highest concentration of ozone was produced by source
of pollution when the climate was not conductive to diffuse. For decrease
the magnitude of ozone, ozone precursors should be controlled.
This study applied three statistical methods including correlation
analysis, factor analysis, cluster analysis to investigate similarities of
pollutant levels for monitoring stations and area classification in (Y-C-T)
area,and investigated characteristics of those seprational regions.
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