長久以來懸浮微粒一直是台灣空氣品質指標性汙染物，為瞭解南台灣地區事件日形成之原因，本研究使用南部空氣品質監測站 (崙背、朴子、新營與橋頭)之PM10、PM2.5、SO2、NOx、風速風向之連續監測資料，並以一氧化碳(CO)作為擴散因子(φ)，將汙染濃度增量來源分為擴散不良增量與額外增量討論分析事件日之來源組成。研究重點首先為各站懸浮微粒逐月變化與逐時分佈關係，以瞭解各站趨勢變化關係，再彙整各站事件日物種濃度資料，統計並尋找各事件日發生原因，最後使用風速風向與PM2.5~10迴歸比對討論。
根據南部空氣品質監測站資料討論雲嘉南地區懸浮微粒趨勢，每年9月至隔年3月為南台灣地區懸浮微粒之高濃度季節。由2007年1月~2009年12月之數據顯示，冬季南台灣地區PM10月平均濃度最高可至110~120 μg/m3；PM2.5可至45~50 μg/m3。崙背站2007年11月1日事件日為例，以CO來比較其增量濃度來源，增量濃度來源屬於粗微粒額外增量型，PM2.5~10之濃度增量佔事件日濃度增量高達86.09%。而比對風花圖，當日風向穩定為東北風，風速與PM2.5~10之迴歸R2值為0.74顯示PM10的累積與風速大小呈現高度相關性，判斷為本土沙塵影響。

In order to understand the main reasons for PM10 episodes in south Taiwan, the CO is used as a tracer to differentiate the contributions of dispersion and excess sources. There are three parts in this study, by the variation of mass concentration for each month and each hour, we can understand the relation and trend in four air quality monitoring sites. Then use CO to find the main source when PM10 episodes were occurred. Finally, by the comparisons of mass concentration data and wind speed regression analysis data to make sure the study is accurate.
There were three air quality monitoring sites in Yunchianan area including Lunbei、Putzu and Xinying, and one air quality monitoring site in Kaohsiung. According to the data measured by monitoring sites during January 2007 to December 2009, the average concentration of PM10 maximum is 110~120 μg/m3 and concentration of PM2.5 is about 45~50 μg/m3. For example, November 1st 2007 is one of the event days of Lunbei site. It was defined as excess sources mainly by CO factor(φ). After compared with the wind follower chart and the wind speed regression analysis, the source of Total Suspended Particulate should be Local dust.

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