頁籤選單縮合
題 名 | Air Basins Determined in Taiwan-Preliminary Results=臺灣氣源區的劃分研究 |
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作 者 | 莊秉潔; 陳建隆; 廖忠明; | 書刊名 | 中國環境工程學刊 |
卷 期 | 9:3 1999.09[民88.09] |
頁 次 | 頁199-208 |
分類號 | 445.63 |
關鍵詞 | 氣源區; 主成份分析; 因子負荷; 空氣品質; Air basin; Principle component analysis; Factor loading; Air quality; |
語 文 | 英文(English) |
中文摘要 | 針對環保署之66個空氣品質測站作主成份分析,所使用的資料是1994年及1995年所量測SO�砥BPM�煄BCO、O�陛B及NOx等五種污染物之日平均值濃度。先將各個污染物濃度資料分別做其資料的標準化,接著進行主成份分析,然後選取解釋變異量達到85%的主因子。測站間的分群則將各測站的較強主因子相同者聚集在一起,亦即測站間之共變數。而測站間共變數相同的,可能為具有相同的最大主因子負荷,可將這些測站歸類成同一區域。分析結果顯示,每個區域沿著盛行風方向約125公里長,10公里寬,並以200公尺高的山丘做為氣源區的分界。1994年及1995年監測站之氣源區分析結果稍有不同,其變動皆位為氣源區交界處。不同形態的測站,如背景及公園測站也能和其周遭的大氣測站區隔出來。最後綜合兩年的資料發現,分析結果顯示第1、2、3、4、8、9、11及22主因子,可以用地理位置來解釋,將臺灣劃分為北部氣系、中部沿每氣系、中部內陸氣系、南部沿每氣系、宜蘭氣系、花蓮氣系及臺東氣系等八個氣源區。 |
英文摘要 | Sixty-six air quality stations are grouped using principal component analysis (PCA). The daily average concentrations of SO��, PM��, CO, O��, and NOx measured by the EPA in 1994 and 1995 are analyzed. In addition, this study extracts the major factors up to the accumulative variance explanation reaching 85%. Analytical results of 1994 and 1995 data are then compared, demonstrating something different at the air basin interface. Each group is around 125 km in length along the wind direction and 40 km in width perpendicular to the wind direction. Mountains with heights over 200 m affect the classification of air basin. The results also show that different maximum loading factors are extracted from background and national park types of air quality monitoring stations (AQMS), distinct from their neighboring ambient AQMS. Finally, the air basins in Taiwan are analyzed by PCA using both 1994 and 1995 air quality data. According to the results, factors 1, 2, 3, 4, 8, 9, 11, and 22, determined by PCA, correspond to the southern coastal air basin, northern air air basin, central coastal air basin, Hualien air basin, southern inland air basin, central inland air basin, Taitung air basin, and Ilan air basin, respectively. |
本系統中英文摘要資訊取自各篇刊載內容。