EPA-94-FA11-03-014

095

10,020 千元

2005/03/08

2006/12/31

王家麟 教授

監資處

王家麟

環境資訊系統

光化學現象,臭氧前驅物,微粒超級測站

photochemical reaction,precursor of ozone,Aerosol supersite

李崇德,教授、詹長權,教授

王介亨

034227151-6591

93243005@cc.ncu.edu.tw

對於由微粒超級監測站與光化學評估監測站所得之氣膠微粒與臭氧前驅物的品質保證與數據分析在此報告中分兩個別計畫討論。 (a)微粒超級測站 微粒超級測站2006年各項儀器1～11月監測數據的資料可用率，除了RP1400 PM10(微粒質量濃度監測儀)、RP5400(微粒碳成分監測儀)、RP8400S(微粒硫酸鹽監測儀)外，其餘各儀器可用率在93 %以上。本年度黃沙時期在超級測站的人工採樣與新莊空品站、板橋空品站及菜寮空品站PM10微粒質量濃度仍然具有良好的一致性。在儀器比對期間，超級測站自動監測儀與人工量測的微粒質量濃度、硫酸鹽、硝酸鹽、碳成分大部分有良好的趨勢，但是自動監測儀監測數值有略低的現象。 (b)光化學評估監測站 光化學測站監測計畫目的主要包含兩部份，第一對於台灣地區北、中、南共八測站自2005年起進行品保作業，第二，對於區域性的範圍進行臭氧成因的研析，經過5年的計畫操作經驗，已能確保測站正常運轉與資料分析，並建立標準化操作程序。 報告中以管制圖、儀器運轉率、數據可用率與資料分布圖等進行品保品管的操作，而時間序列圖表數據則顯示實際分析的結果，並以標準品以固定週期的分析進行儀器方法的校定，2006年北部及中部共5站的數據可用率可達90%，南部共3站的數據可用率可達80%，新增的南部儀器經過今年度的磨合將會在明年有更好的數據品質。 為了進行資料管理與數據呈現，並方便使用者的研析，已於今年度架設一網站，使光化學監測站的資料能夠公開使用。 臭氧前驅物自2002年至2005共5年的長期趨勢首次完整呈現於報告內，日夜變化與季節性變化的長期趨勢則由成分分析、各物種的光化學反應及氣象因子綜合探討，發現各物種的濃度變化有些許的下降趨勢。

光化學現象,臭氧前驅物,微粒超級測站

期末報告_光化測站(定稿).pdf

3MB

[期末報告]公開完整版

2007/2/1 上午 12:00:00

Methods of data reduction and quality assurance for the two projects of Supersite and Photochemical Assessment Monitoring Stations (PAMs) in the period of 2005-2006 are discussed in two separate parts of this report. (a)Supersite The data availabilities at the North Aerosol Supersite for the most installed instruments operated from January to November 2006were above 93% except for RP1400 PM10 mass monitor, RP5400 Carbon monitor, and RP8400S Sulfate monitor. For an event with a broad geographical scale such as the transport of Asian yellow dust, the PM10 mass concentrations measured at the North Aerosol Supersite were in a good agreement with the nearby three ambient air-quality monitoring stations. The collocated comparisons between automated instruments and manual collection methods show that data variation trends are consistent for aerosol mass concentration, sulfate, nitrate, and carbon content but the values from automated instruments tend to be lower. (b) PAMs The objectives of the PAMS project are two fold, firstly, to quality-assure the 8 PAM stations currently deployed in northern, central, and southern Taiwan since 2005; secondly, to elucidate the ozone formation mechanism in the non-containment areas. More than 5 years of operation experience has led to the solidification of the quality assurance plans as well as the standard operation procedure (SOP) for the PAMS program. In this report, methods of data quality control and assurance are illustrated by, e.g., quality control charts, tables of data completeness, and the final completed concentration sheets and time-series plots. Periodic injections of the standard mixture containing 56 species serve as the core task for QA/QC of the PAMS program. Data completeness as high as averaged 90% for 5 stations in northern and central Taiwan, and 80% for 3 southern stations was achieved in 2006. Quality of southern stations is expected to improve as these new instruments are tuned to better conditions in the near future. In order to better manage data, display results, and facilitate data usage, a website designated to PAMS program has been established. Five year trends of selected ozone precursors from 2002 to 2005 have been compiled for the first time in this project. Diurnal and seasonal features with the long-term trends are discussed from the perspectives of source types, photochemical reactivity, and meteorology. Slight decreasing trends for most of the species were found.

photochemical reaction,precursor of ozone,Aerosol supersite