EPA-92-L105-02-216

092

950 千元

2003/06/09

2003/12/31

華梅英

監資處

東南技術學院環境與安全衛生工程系

環境資訊系統

監測,臭氧,空氣品質,台北盆地

ozone,air quality,monitoring

郭天和

華梅英

(02)8662-5935轉502

myhua@mail.tnit.edu.tw

本計畫為探討台北盆地之臭氧累積效應，以及大台北地區之臭氧濃度偏高現象，將十年來北桃地區各測站所測得之監測資料加以分析。以了解在臭氧事件日時各測站間濃度分佈情形及各測站因地形效應，污染物日間易由淡水河口向南方傳送，造成盆地下風地區之新店、土城、新莊、板橋、萬華及古亭等站之臭氧測值，經常超過空氣品質標準之原因。 依研究結果顯示，陽明之測值十年來在10th至70th百分位值，均為所有測站最高；每日最大小時值之年平均值在近三年亦為最高。其測值之變動性亦較其他測站為小。其原因推測與該站之高程、地處偏遠有關。同屬偏遠地區之萬里站，亦有類似趨勢，估計其亦因地處偏遠，車流稀少，背景NOx較低，無法引起足夠化學作用以減少臭氧。此外台北盆地受海陸風交替影響在清晨及傍晚移入及移出氣團，使該二測站濃度值在夜間偏高。 目前評估臭氧空氣品質之小時值與八小時值之間，因由測站值數據相關性計算，二者有調整之空間，以使該二標準值均能?預期之空氣品質維護成效。由臭氧超過品質標準定義事件日之發生，在北部空品區事件日多以新店、土城、萬華、板橋、松山等站最常超過小時值。以月份而言，四至九月間為最常發生之時段，11至2月則為較少發生之時段。 由深坑測值與北桃測站間之濃度分佈圖比較，可知深坑地區測值在七月份與松山站之最大小時值較其他站高。而六、九、十月則為新店站居首。測站除2003/7/9事件日較其他站測值偏高外，其餘事件日測坑測值均未使濃度分佈圖有明顯之差異。在坪林所設之測站，亦無明顯山區臭氧濃度增高現象，顯示在台北盆地東南方廣大丘陵地區，目前並無迫切設測站之需要，現有測站足夠推估本區臭氧濃度分佈。但因本計畫執行期程僅半年，應再有較長時間之調查以確定。 為使本研究之成果能提供各界使用，本計畫於東南學院環境與安全衛生工程系之網站下加掛本計畫網頁，可查詢十年來主要臭氧事件日之濃度變化狀況，為使變化情形有連慣性，該濃度圖以動態方式呈現。

監測,臭氧,空氣品質,台北盆地

0000040251.pdf

26MB

[期末報告]公開完整版

2004/2/1 上午 12:00:00

This project analyzes the data collected from monitoring stations located in Taipei-Taoyuan area in the past 10 years, in order to discuss the accumulative effect of ozone in Taipei basin, as well as the high concentration of ozone in Taipei metropolitan area. The result of this study shows the Yangmin station has the highest records in the past 10 years with the value between 10th and 70th decimals. The daily maximum and minimum hour-average-values are also the highest in the last 3 years. The records of this station also show minor variation compared with those of other stations. The reason might due to its higher elevation the distance from metropolitan area for light traffic resulting in weaker concentration of NOx in the background, which is the usual mechanism that reduces ozone through chemical reaction. Another reason which cause the high concentration of these two stations during the night time is the land-sea wind changing phenomena. The result of calculating records collected from the monitoring stations systems shows there is a space to adjust a hour-value and -hour-value, in order to achieve the air quality maintenance effect by both standard values. The comparison of records from Shangkun station and Taipei-Taoyuan area concentration distribution map shows Shangkun has lower value in July and maximum-minimum value are higher than other stations. There is no significant increase of ozone in mountain area according to the data recorded at Pingling station. This shows that there is no urgent need on establishing any additional station in southeast area of Taipei basin. The current stations are able to estimate the distribution of concentration of ozone of this area. However, the six month restriction of this project should be extended to acquire better result. One could take the result of this project in the website of the department of Environment Safety and Health, Tung Nan Institute of Technology. Users would be able to inquire the change of concentration of major ozone event days in the past 10 years.

ozone,air quality,monitoring