EPA-106-FA11-02-A156

106

2,560 千元

空氣品質監測

2017/03/28

2017/12/31

王聖翔

監資處

林佳慧

臺灣氣膠研究學會

大氣空氣、環境監測及檢測

微脈衝雷射雷達；氣膠垂直分布；國際合作

Micro-pulse lidar (MPL), Aerosol vertical distribution, International collaboration

陳韡鼐

王聖翔

03-4227151#65527

shenghsiang.wang@gmail.com

本計畫之目標與工作內容為(1)執行微脈衝雷射雷達系統之架設與運作；(2)建構觀測資料庫；(3)定期完成資料品質保證與品質管制作業；(4)整合微脈衝雷射雷達系統與環保署空氣品質測站等監測資料，解析高污染事件下空氣品質惡化之可能成因；(5)建立經驗模式，輔助空氣品質預報作業；(6) 強化微脈衝雷射雷達全球監測網及國際聯合監測實驗之合作，提升微脈衝雷射雷達遙測於空氣品質監測之應用。 執行之重要成果如下： • 建立並執行標準維護程序，以表單詳細記錄儀器維護狀況與突發事件之儀器調度，同時建立完整的儀器維護方法與各項事務流程；移動式機櫃之溫控相關改善工程，大幅提升資料的連續性。 • 每月執行餘脈衝及觀測背景值之校正作業、並實施資料品保品管作業，確保資料可用率與穩定性，持續更新即時顯示網頁與觀測資料庫之維護。 • 為提高資料品質並加強國際交流，本計畫成功與NASA MPLNET進行合作，MPLNET派遣首席技術工程師來臺，進行校正技術的傳授與指導，包含校正與精進光達偏振能力，並加裝Wide-Field Receiver (WFR)，將原先無法解析的高度大幅降低至200公尺，進而增加光達在近地表觀測的準確性與可信度。 • 以客觀統計方法定義出高污染並建立事件資料庫，將光達所觀測的氣膠垂直分布，整合地面空品與相關氣象資料，進行時間與空間上的多尺度分析，觀察污染物垂直及水平方向分布情形，釐清區域性污染傳送特徵，深入了解高污染事件之成因。

微脈衝雷射雷達；氣膠垂直分布；國際合作

期末報告.pdf

21MB

期末報告

2019/3/1 上午 12:00:00

The objectives and task of this project are: (1) to execute the operation and maintenance of the Micro-pulse lidar systems；(2) to build the lidar observation database；(3) to accomplish the operations of data QA/QC；(4) to integrate the observational data based on EPA MPL systems and air quality monitoring station, and further analyze the possible causes of high pollution events；(5) to establish the experience with lidar data and export its potential on air quality forecast；(6) to intensify the international collaborations cooperation with NASA MPLNET and implement MPL technology for air quality monitoring. The important achievements from this project are listed as follows: • We had established and execute standard maintenance procedures. We recorded the details of instrument maintenance status and scheduling. The issue of two new enclosures due to their bad temperature control has been discussed and improved significantly. • We had executed the After Pulse and Dark Counts calibration and data QA/QC procedure on schedule to ensure the availability and stability of MPL data. The MPL data has been posted to webpages and database real time and completely. • We spent lots of efforts to strengthen international collaboration with NASA MPLNET. MPLNET sent their A chief technical engineer from NASA MPLNET visited Taiwan in October. He guided us many MPL technology and knowledge. During his visit, our MPL systems have been upgrades with the capability of polarization and lower overlap (from 2 km down to 200 m) through installing the Wild-Field-Receiver (WFR). By doing that, our MPL systems should have higher accuracy and data reliability for near surface observation. • We applied a statistical method to define the high pollution events in this year and set up a database for case studies. We systematically analyze those pollution events with observational data obtained from EPA MPL system and air quality monitoring stations in Taiwan. We explained the causes of high pollution events based on multiscale analysis including vertical and horizontal distribution of particulate matters and meteorological conditions. The results from those case studies significant improve our understanding on the air quality deterioration.

Micro-pulse lidar (MPL), Aerosol vertical distribution, International collaboration