| DC 欄位 |
值 |
語言 |
| DC.contributor | 環境工程研究所 | zh_TW |
| DC.creator | 宋鎮宇 | zh_TW |
| DC.creator | Zhen-Yu Song | en_US |
| dc.date.accessioned | 2000-7-12T07:39:07Z | |
| dc.date.available | 2000-7-12T07:39:07Z | |
| dc.date.issued | 2000 | |
| dc.identifier.uri | http://ir.lib.ncu.edu.tw:444/thesis/view_etd.asp?URN=87326009 | |
| dc.contributor.department | 環境工程研究所 | zh_TW |
| DC.description | 國立中央大學 | zh_TW |
| DC.description | National Central University | en_US |
| dc.description.abstract | 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。 | zh_TW |
| dc.description.abstract | 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. | en_US |
| DC.subject | 氣膠 | zh_TW |
| DC.subject | 散光係數 | zh_TW |
| DC.subject | 氣膠粒徑分布 | zh_TW |
| DC.subject | 氣膠化學組成 | zh_TW |
| DC.subject | 加強因子法 | zh_TW |
| DC.subject | 沙塵暴 | zh_TW |
| DC.subject | aerosol | en_US |
| DC.subject | scattering coefficient | en_US |
| DC.subject | aerosol size distribution | en_US |
| DC.subject | aerosol chemical composition | en_US |
| DC.subject | enhancement factor | en_US |
| DC.subject | yellow dust | en_US |
| DC.title | 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 | zh_TW |
| dc.language.iso | zh-TW | zh-TW |
| DC.type | 博碩士論文 | zh_TW |
| DC.type | thesis | en_US |
| DC.publisher | National Central University | en_US |