EPA-98-FA11-03-A016

098

2,380 千元

2009/01/01

2009/12/31

李崇德

監資處

藍文農

國立中央大學

環境資訊系統

大氣氣膠、氣膠組成、超級測站、氣膠連續監測特性、台北都會區

Atmospheric aerosol, aerosol composition, aerosol supersite, continuous monitoring aerosol characteristics, Taipei metropolis

周崇光,張士昱

羅莉雯

03-4227151#34652

lucy2007.lo@gmail.com

本計畫目標為執行環保署北部微粒超級監測站(超測)儀器品保查核以確認監測數據品質，每月均執行2次定期查核，每半年還有一次儀器精密校正，每月並參與環保署及自行召開監測品質維護會議。本年度更新了超測品保查核程序，各儀器統計的運轉率除了碳成分分析儀為85%外，各儀器都在93%以上。為評估自動監測儀器量測微粒質量濃度及成分效能，本計畫進行人工比對量測，結果顯示質量濃度相當一致，碳成分有低估的現象，硫酸鹽一致性良好但濃度有差異，硝酸鹽在加入揮發部分後監測值差異大為降低，後兩部儀器的標準液轉化率都不穩定，由於原廠已經停產無法提供技術支援，以適當監測系統來汰換相當急迫。在現有儀器中，雷射微粒數目粒徑分佈監測儀的雷射發射位置有所偏離，建議送回原廠維修。在不同監測項目關聯性方面，本年度的PM10和PM2.5質量濃度為R2 =0.79、PM2.5質量濃度和PM2.5總散光係數為R2 =0.81、PM2.5質量濃度和PM2.5背散光係數為R2 =0.89、PM2.5質量濃度和PM2.5硫酸鹽為R2 =0.76、PM2.5質量濃度和PM2.5硝酸鹽為R2 =0.46、黑碳濃度(波長660 nm)與光學元素碳濃度為R2 =0.91，都獲得中等以上線性相關。 配合環保署監測業務需求，本計畫結合超測及鄰近空氣品質監測站，進行污染個案分析，已提交10份個案報告包括2009年1~5月氣膠濃度時間變化分析、黃沙事件分析、歷年來氣膠特性分析。本計畫也探討超測微粒的污染來源，指出南方的固定污染源與北方移動污染源的排放，在風速較低時，容易影響超測的微粒性質。技術轉移和數據查核訓練已於2009年6月26日在超測現場及環保署辦理。針對超測監測成果，本計畫在2009年7月22日於台北舉行發表會，參與人數188人，反應相當熱烈。

大氣氣膠、氣膠組成、超級測站、氣膠連續監測特性、台北都會區

EPA-98-FA11-03-A016.DOC.pdf

10MB

期末報告

2010/3/1 上午 12:00:00

The goal of this project is to audit instrument performance and validate data quality of the North Aerosol Supersite (Supersite) at the Taiwan Environmental Protection Administration (TEPA). To achieve this goal, work such as twice site inspections in every month, detailed calibration on instruments in every 6 months, and individual quality assurance meetings held by TEPA and this project in every month, respectively, were conducted. This year, the procedure of site inspection was renewed. The data acquisition rates for all instruments were above 93% except for 85% from carbon analyzer. For assessing performance of automated instruments on monitoring aerosol mass and compositions, this project conducted collocated comparisons between automated instruments and manual collection. The results showed that the variations of PM2.5 mass were quite consistent. PM2.5 carbon measurements tended to be lower. PM2.5 sulfate was with good agreement but was deviated in concentration. The agreement between automated monitoring and manual analysis for PM2.5 nitrate was greatly improved after compensating its volatile fraction. Owing to unstable conversion efficiency, out of production, and lacking technical support from the manufacturing company, the replacement of the latter two instruments with an appropriated system is imminent. Among the instruments in operation, a deviation of laser alignment was found for laser aerosol size spectrometer and is suggested to return to the manufacturing company for repairing. This year, the correlations between each paired measuring items were R2 =0.79 for PM10 and PM2.5 mass concentration, R2 =0.81 for PM2.5 mass concentration and total light-scattering coefficient, R2 =0.89 for PM2.5 mass concentration and backscattering light-scattering coefficient, R2 =0.76 for PM2.5 mass concentration and sulfate, R2 =0.46 for PM2.5 mass concentration and nitrate, and R2 =0.91 for black carbon (at 660 nm) and optical elemental carbon, respectively. All are above middle level in linear regression correlation.

Atmospheric aerosol, aerosol composition, aerosol supersite, continuous monitoring aerosol characteristics, Taipei metropolis