EPA-96-FA11-03-A007

096

4,780 千元

2007/01/08

2008/12/31

李崇德

監資處

藍文農

國立中央大學

環境資訊系統

氣膠超級測站,氣膠連續監測,氣膠特性

Aerosol supersite,aerosol continuous monitoring,aerosol characteristics

周崇光,張士昱

羅莉雯

03-4227151-34664

lucy2007.lo@gmail.com

本計畫目標為辦理環保署北部微粒超級監測站品保查核，每個月針對大部分儀器進行定期查核，每兩個月進行不定期查核；另外，每半年進行微粒粒徑分布儀器查核。查核後儀器若有狀況，即請維護單位進行修護。每個月本計畫均與維護單位進行儀器狀況檢討會議，以確保數據品質。2008年至12月底各項儀器的數據運轉率除了PM2.5硝酸鹽自動監測儀為74.5 %以外，其餘都在87%以上。在自動監測器和人工採樣器的併行比對上，PM2.5微粒質量濃度、PM2.5元素碳、PM2.5有機碳、PM2.5硫酸鹽大致有相同變化趨勢，但在數值上則互有高低；至於PM2.5硝酸鹽自動儀器濃度大多低於人工採樣值。本年度黃沙事件時期的人工採樣與鄰近的新莊、板橋及菜寮空品站PM10微粒質量濃度具有良好的一致性。氣膠粗微粒的監測，以雙頻道採樣器進行粗微粒的人工採集，最有實積；以PM10-PM2.5差異量推估粗微粒濃度也是常用的替代方式。本計畫分別於2008年6月及10月辦理了兩次教育訓練，內容包括儀器運轉原理、儀器查核、數據處理、儀器實地操作。不同監測項目的關聯性分析，顯示有多項儀器彼此間的關聯性佳。對於數據變異的長期分析，PM2.5質量濃度、PM2.5硝酸鹽濃度、PM2.5碳成分濃度在以一年為基期的計算上顯示有逐漸降低的趨勢。然而，PM2.5硫酸鹽濃度則是呈現周期性的變化且逐漸上升。為了能瞭解自動監測儀器與人工採樣分析結果的關係，本計畫彙整列出2002到2008七年來各項自動儀器與人工採樣比對的結果，以方便進行彼此間的轉換。

氣膠超級測站,氣膠連續監測,氣膠特性

96年度及97年度期末報告.rar

10MB

[期末報告]公開完整版

2009/3/1 上午 12:00:00

The goal of this project is aiming at executing quality assurance audits on the performance of North Aerosol Supersite. The procedures include fixed-term monthly and mobile bi-monthly checks on most instruments. In addition, a half-year check was conducted on particle size distribution instruments. Trouble shooting was required for the maintaining company on instruments not in compliance. Every month, this project held a bi-lateral meeting with the maintaining company to assess instrumental performance for validating the acquired data quality. The data acquisition rates for all instruments were above 87% except for 74.5% for PM¬2.5 nitrate monitor at the end of October in 2008. For collocated comparisons between automated instrument and manual collection, the variations of PM2.5 mass, PM2.5 elemental carbon, PM2.5 organic carbon, and PM2.5 sulfate were consistent. However, irregular high and low values were found for the comparisons. The PM2.5 nitrate from automated instrument was mostly lower than that of manual collection. During yellow-dust event periods in 2008, PM10 mass levels were found a good consistency between manual collections and automated instruments in the nearby Hsin-Chuan, Pan-Chao, and Tsai-Liao air quality stations. For the monitoring of aerosol coarse particles, the dichotomous sampler has long been used; and for the alternative, the subtraction between PM10 and PM2.5 value is also a popular way. Two educational trainings for instrumental measuring principle, instrumental audit, data analysis, and field operation of instruments were held in June and October this year, respectively. Data from selected instruments in the North Aerosol Supersite were found, in general, correlated reasonably well each other. For the analysis of data variation trend, PM2.5 mass level, PM2.5 nitrate, and PM2.5 carbons declined gradually in the calculation of yearly moving average. PM2.5 sulfate, however, had an increasing trend with cyclic variations. The collocated comparisons between automated instruments and manual collections from 2002 to 2008, seven years in total, were listed for easy conversion.

Aerosol supersite,aerosol continuous monitoring,aerosol characteristics