台灣地區大氣氣膠特性之研究---高雄及台北都會區氣膠特性與散光係數

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宋鎮宇(Zhen-Yu Song) 查詢紙本館藏

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環境工程研究所

論文名稱

台灣地區大氣氣膠特性之研究---高雄及台北都會區氣膠特性與散光係數

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摘要(中)

研究結果顯示高雄地區氣膠的綠光散光係數日平均值範圍介於0.122~0.564km-1之間，平均值為0.321km-1，氣膠散光係數主要來自於北方的污染源。在兩小時採樣區間下，細粒徑氣膠質量濃度範圍介於160.8~25.4?g/m3，對照環保署小港測站PM10數值後，得到PM2.5/PM10的平均值為0.62，所量測的氣膠質量濃度與散光係數有良好的相關性(r=0.78)。
相對地，台北都會區綠光散光係數日平均值範圍介於0.032~0.484km-1之間，平均值為0.181 km-1。在沙塵暴期間，超微米氣膠對散光係數的貢獻量由平時的26%提升為47%，其含塵氣膠尖峰粒徑為2?m。由MOUDI分粒徑化學採樣分析的結果，顯示台北地區細粒氣膠組成以SO42-、TC和 NH4+為主，粗粒徑氣膠主要成份則為NO3-、Si及海鹽離子。

摘要(英)

The results show daily averages of the smallest 5-min ?sp from green wavelength in Kaohsiung ranging from 0.122 to 0.564km-1, with an average of 0.321km-1. The 2-hr intervals of PM2.5 collected in this study are in the range from 160.8 to 25.4?g/m3. By taking PM10 values from a nearby EPA air quality monitoring station, a ratio of PM2.5/PM10 at 0.62 is obtained. The measured ?sp is correlated well (r=0.78) with the collected aerosol mass.
In contrast, the daily averages of the 5-min ?sp in Taipei range from 0.032 to 0.484km-1 with the average at 0.181 km-1. During the landing of yellow storm, the contribution from supermicron aerosols to ?sp increases from 26% to 47%. The modal diameter of the supermicron particles is at 2?m. The size-fractionated chemical contents from MOUDI reveals SO42-, NH4+, and TC are dominant in the fine mode, while NO3-, Si, and sea-salts are major compositions in the coarse mode.

關鍵字(中)

★ 氣膠
★ 散光係數
★ 氣膠粒徑分布
★ 氣膠化學組成
★ 加強因子法
★ 沙塵暴

關鍵字(英)

★ aerosol
★ scattering coefficient
★ aerosol size distribution
★ aerosol chemical composition
★ enhancement factor
★ yellow dust

論文目次

第一章前言1
1.1研究動機1
1.2研究目的2
1.3預期目標3
第二章文獻回顧4
2.1細粒徑氣膠的成因、來源及危害性4
2.1.1細粒徑氣膠的成因4
2.1.2大氣氣膠的組成8
2.1.3細粒徑氣膠的危害10
2.2大氣氣膠對視程衰竭與光學係數的關係12
2.2.1視程的定義12
2.2.2視程衰竭的探討13
2.2.3氣膠光學係數與氣膠粒徑的關係15
2.2.4氣膠光學係數與氣膠質量濃度的關係8
2.2.5氣膠散光係數與氣膠化學組成的關係12
2.2.6氣象因子的影響22
第三章研究方法及步驟28
3.1採樣地點及時間29
3.2採樣及量測方法34
3.2.1氣膠粒徑分布34
3.2.2氣膠微粒的散光係數35
3.2.3氣象因子的量測39
3.2.4氣膠化學成份採樣(高雄採樣)39
3.2.5氣膠化學成份採樣(臺北採樣)42
3.2.6濾紙前處理43
3.3採樣標準操作程序44
3.3.1氣象塔44
3.3.2金屬元素、水溶性離子及碳元素的採樣44
3.3.3樣品保存方法、時間45
3.4樣品分析方法46
3.4.1氣膠粒徑分布46
3.4.2氣膠的散光係數46
3.4.3氣膠微粒散光係數的簡易模式46
3.4.4濾紙秤重47
3.4.5水溶性離子分析方法48
3.4.6含碳量的分析方法49
3.4.7金屬元素的分析方法51
3.4.8污染來源推估方法52
3.4.9氣膠微粒對散光係數的多元複迴歸分析53
第四章結果與討論54
4.1高雄小港採樣結果55
4.1.1氣膠綠光散光係數、數目濃度、體積濃度採樣結果55
4.2高雄小港氣象資料59
4.2.1基本氣象資料59
4.2.2風向與散光係數63
4.2.3風向與氣膠體積濃度64
4.2.4風向與風速的分布64
4.2.5影響小港地區散光係數主要的天氣型態66
4.3理論散光係數與實測散光係數的比較67
4.4影響小港地區散光係數主要的天氣型態氣膠粒徑分布69
4.5短期化學採樣PM2.5細粒氣膠的化學組成79
4.5.1氣膠質量濃度79
4.5.2氣膠水溶性離子平均質量濃度84
4.5.3氣膠的總碳量質量濃度88
4.5.4氣膠金屬元素質量濃度90
4.5.5氣膠化學組成百分比91
4.5.6化學組成陰陽離子間的平衡92
4.6化學物種質量濃度與散光係數間的探討94
4.6.1氣膠散光係數與氣膠質量及化學組成相關性分析94
4.6.2氣膠質量濃度推估散光係數96
4.6.3氣膠散光係數與化學組成多元線性迴歸分析97
4.7以加強因子法推估小港細粒氣膠污染源99
4.8臺北都會區採樣結果及數據107
4.8.1氣膠綠光散光係數、數目濃度、體積濃度採樣結果107
4.9臺北都會區氣象資料110
4.9.1基本氣象資料110
4.10.1理論散光係數與實測散光係數的比較114
4.10.2臺北採樣期間大氣氣膠粒徑分布型態115
4.11沙塵暴對臺北地區影響的探討117
4.11.1沙塵暴的成因117
4.11.2沙塵暴對臺北都會區大氣氣膠分布的影響119
4.11.3沙塵暴期間氣膠粒徑散光係數逐時分布124
4.12臺北氣膠化學組成採樣133
4.12.1氣膠化學組成資料133
4.12.2化學組成陰陽離子間的平衡137
4.12.3臺北採樣期間不同粒徑氣膠化學物種百分比138
4.12.4氣膠物種組成粒徑分布的比較143
第五章結論146
參考文獻148

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指導教授

李崇德(Chung-Te Lee)

審核日期

2000-7-12

推文