頁籤選單縮合
題 名 | 北臺灣PM2.5污染來源與管制方向之探討=The Study of PM2.5 Pollutant Sources in North Taiwan and the Suggestions for Future Regulations Formation |
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作 者 | 張順欽; | 書刊名 | 行政院環境保護署環境監測及資訊處技術彙刊 |
卷 期 | 4 2010.04[民99.04] |
頁 次 | 頁1-34 |
分類號 | 445.63 |
關鍵詞 | 原生性氣膠; 衍生性氣膠; 光化學活性; Primary aerosol; Secondary aerosol; Photochemical activities; |
語 文 | 中文(Chinese) |
中文摘要 | 本研究以北台灣16個空氣品質監測站2006年至2009年監測結果,分析污染來源,以提供管制策略研擬參考。以臭氧最大值(O3,max)分類,把光化活性分成小於60 ppb、60至80 ppb、80至120 ppb及大於120 ppb四個等級。再以CO作為原生氣膠排放與擴散指標,據以推估不同光化等級下,衍生二次氣膠的濃度。以陽明測站及背景測站作為背景對照,據以推估北部都會地區原生性PM2.5及境外傳輸等比例。分析結果顯示,都會地區排放的原生性PM2.5大約佔20%至30%之間,而當光化活性增加,衍生性PM2.5可以達30%。在下午時段,衍生性PM2.5甚至佔了30%至50%。2006年至2009年共1461天屬於低光化活性,北部都會區PM2.5濃度27.9 μg m-3,屬於環境背景約佔36.5%,區域背景約24.5%,都會區原生性排放約佔24.4%,而屬於高光化活性(O3,max > 60 ppb)衍生的PM2.5增量約佔14.6%。如果僅考慮高光化活性(O3,max > 60 ppb)共758天,都會區PM2.5濃度34.0 μg m-3,其中屬於環境背景約佔29.9%,區域背景約20.1%,都會區原生性排放約佔27.0%,而屬於光化衍生的PM2.5增量約佔23.0%。在不考慮擴散條件佳的低光化活性日子,北部都會區PM2.5濃度約有50%屬於人為污染排放有關的,原生性排放控制與衍生氣膠造成污染程度幾乎相當。 |
英文摘要 | We used the PM2.5 monitoring data from 16 sites in Northern Taiwan during 2006~2009 to demonstrate the environmental influences on primary emission, secondary formation and background level. The maximum hourly ozone concentration data in each day (O3,max) was used as an index of photochemical activity and categorized into four groups based on concentration: ≦60 ppb, 60 ~80 ppb, 80 ~120 ppb, and ≧120 ppb. Moreover, CO was used as the primary aerosol tracer and a key item of dispersion condition to evaluate secondary aerosol formation at different photochemical activities. The PM2.5 data from Yangming site and background sites were used to show the environmental influences within/without local emissions. As the results, primary PM2.5 from urban sources is about 20% while secondary PM2.5 may up to 30% during strong photochemical activities periods. In the afternoon period, secondary PM2.5 could reach 30-50%. There are 1461 days with low photochemical activity during 2006~2009, the average concentration of PM2.5 is 27.9 μg m-3, with 36.5% as background level, 24.5% regional level and urban primary emission 24.4%. For those 758 days with higher photochemical activity (O3,max > 60 ppb), the average concentration of PM2.5 is 34.0 μg m-3, with 29.9% as background level, 20.1% as regional level, 27.0% unban primary emission and 23.0% as the increment from secondary formation. The results indicate that about 50 % of PM2.5 level during poor dispersion condition in northern Taiwan is attributed to primary emission. Our findings could provide important information for PM2.5 control strategies formation. |
本系統中英文摘要資訊取自各篇刊載內容。