博碩士論文 93243009 完整後設資料紀錄

DC 欄位 語言
DC.contributor化學學系zh_TW
DC.creator歐陽長風zh_TW
DC.creatorChang-Feng Ouen_US
dc.date.accessioned2010-8-2T07:39:07Z
dc.date.available2010-8-2T07:39:07Z
dc.date.issued2010
dc.identifier.urihttp://ir.lib.ncu.edu.tw:88/thesis/view_etd.asp?URN=93243009
dc.contributor.department化學學系zh_TW
DC.description國立中央大學zh_TW
DC.descriptionNational Central Universityen_US
dc.description.abstract本研究探討台灣氣態污染物的變化特徵與大氣傳輸行為之關係,以鹿林山測站之氣態污染物觀測做為台灣高山背景值的依據,並利用台北雙園光化測站及南投竹山光化測站的觀測資料,討論近地表大氣之傳輸特徵與其影響。研究發現,處於東亞邊陲地帶的台灣,控制其高低層氣態污染物的特徵因素不盡相同,對於高山背景空氣而言,春季因東南亞地區生質燃燒所產生的大量排放,可藉由長程輸送途徑而抵達位於西風帶下游之台灣,使高層大氣中之氣態污染物濃度增加。同時,對於近地表之低層空氣,台灣承受了東北季風所帶來的老化氣團,利用甲烷/丁烷比值的變化,研判春季台灣北部和中部地區均受境外移入的影響,空氣組成改變,例如臭氧濃度上升、一次污染物濃度下降等。夏季因為海洋性氣團的調和,使得氣態污染物呈現較低濃度,該季節轉而受本地排放為主導。根據甲烷/丁烷和乙基苯/對二甲苯比值的變化趨勢和風向資料,推判秋季海陸風的交替為中部地區地表臭氧之主要影響因子。鹿林山測站的觀測結果顯示,氯仿和一氧化碳存在季節性變化,且其濃度日變化趨勢顯示山谷風為主要的形成機制,其餘長生命期之鹵碳化合物的含量穩定,可能為鄰近國家排放減量的結果。 台灣地區地理位置特殊,鄰近全球主要的空氣污染排放源如中國以及東南亞地區等,同時台灣為亞洲大陸空氣污染物外流至太平洋的重要窗口。由鹿林山測站之採樣罐分析資料顯示,甲烷以外之各溫室氣體物種均呈現明顯正成長趨勢,其影響仍有待評估,而中尺度的長程輸送與境外移入現象,例如如不同季節之盛行風與本地氣候的轉換,彼此複合加成,造成了台灣特殊的大氣化學機制與變化特徵。 zh_TW
dc.description.abstractIn this study, characteristics of gaseous pollutants at a high altitude (~3 km) and surface level in Taiwan were investigated by the observatories at Lu-Lin baseline station and PAMS stations, respectively. Elevated concentration and CO and O3 were measured in spring at Lu-Lin due to biomass burning in Southeast Asia. During the same period, a relatively higher values of ethane/n-butane compared to those in summer was also observed at Shaung-Yuan PAMS station, which indicates the aged continental air masses carried by the monsoon impacting northern Taiwan. In springtime, the abrupt changes from domestic to long-range transport (LRT) conditions for the 4 LRT events identified in Taipei metropolitan area can be sensitively reflected on the variation of the ethane/n-butane ratios, which is consistent with the changes of O3 and NOx concentrations. The north-easterlies in spring can also affect the ages of air masses in central Taiwan, resulting in relatively higher ethane/n-butane and O3 levels than those in summer as observed by the Chu-Shang PAMS station. However, in this study, ethylbenzene/m,p-xylene was found more sensitive than ethane/n-butane in terms of revealing the phenomenon of land-sea breeze. Meanwhile, the diurnal variations of CO at Lu-Lin were found to be driven by mountain-valley breezes. The coupling of the two atmospheric movements is yet to be investigated. The measurements of the mostly anthropogenic halocarbons showed steady-state trends throughout the period from the end of 2007 to 2009, which was the result of the global phase-out of these substances. Meanwhile, greenhouse gases were found to have significant growth during the same period. Situating on the rim of west Pacific facing east China, Taiwan can serve as an ideal location for monitoring the change of air pollutants to assess the level of impact. Our knowledge of the gaseous air pollutants via these well-operated stations can shed light to the understanding of many aforementioned issues, i.e., LRT of Asian continental outflows or biomass burning emissions from Southeast Asia. en_US
DC.subject大氣背景值zh_TW
DC.subject長程輸送zh_TW
DC.subject鹿林山zh_TW
DC.subjectbackground valuesen_US
DC.subjectlong-range transporten_US
DC.subjectLulinen_US
DC.title台灣氣態污染物背景值變化特徵與大氣傳輸機制之關係zh_TW
dc.language.isozh-TWzh-TW
DC.titleThe relationship between atmospheric transport and the characteristics of gaseous pollutants in Taiwanen_US
DC.type博碩士論文zh_TW
DC.typethesisen_US
DC.publisherNational Central Universityen_US

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