鹿林山與中壢氣膠光學垂直特性之監測與比較

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题名:	鹿林山與中壢氣膠光學垂直特性之監測與比較
作者:	徐睿鴻;Ruei-hong Syu
贡献者:	大氣物理研究所
关键词:	氣膠光學厚度;Angstrom exponent
日期:	2007-07-04
上传时间:	2009-09-22 09:43:08 (UTC+8)
出版者:	國立中央大學圖書館
摘要:	此研究為利用太陽輻射儀及微脈衝光達監測比較中壢和鹿林山大氣背景站( LABS , 2862 m ; 23.47 °N, 120.87 °E ) 垂直氣膠光學特性。觀測期間為 2006/04/01 – 2007/03/31，結果顯示中壢平均氣膠光學厚度為 0.427，鹿林山大氣背景站為 0.108。觀測期間鹿林山、中壢太陽輻射儀所觀測之 τ500 季節平均高值皆出現在春季，分別為 0.233 ± 0.156 、 0.783 ± 0.378。利用光達反演氣膠光學特性之垂直剖面，結果顯示以春季在2 - 4公里之高空較易出現顯之氣膠層。後推軌跡分析結果顯示，春季氣膠之主要來源為東南亞生質燃燒。同時並利用氣流後推軌跡將氣膠來源分類，探討中壢當地與亞洲出流氣膠之貢獻量。利用光達反演中壢高空 3 公里以上之氣膠光學厚度垂直剖面，與鹿林山太陽輻射儀量測之氣膠光學厚度比較。結果顯示兩者呈線性相關，相關係數為 0.91，鹿林山大氣背景站可應用於解釋中壢 3 公里以上氣膠光學特性。此外，於沙塵個案中，鹿林山與中壢太陽輻射儀所觀測之τ527分別為 0.02 – 0.10，0.12 - 0.94，於生質燃燒個案中，鹿林山 τ527為0.14 - 0.91。結果顯示生質燃燒與沙塵氣膠對鹿林山氣膠光學厚度的影響。 The purpose of this study is to characterize the vertical profiles of aerosol optical properties measured by the sunphotometer and micro-pulse lidar in Chung-Li, located in the northwestern Taiwan during April 2006 to March 2007. Above results are compared with those data measured at the Mt. Lulin Atmospheric Background Station (LABS, 2,868 m; 23.47°N, 120.87°E). The average aerosol optical depth is 0.41 and 0.08 for Chung-Li and Mt. Lulin, respectively. The maximum values of seasonally mean aerosol optical depths at 500 nm occurred both at Mt. Lulin ( 0.231 ± 0.166 ) and in Chung-Li ( 0.729 ± 0.360 ) in Spring, respectively. Retrieving micro-pulse lidar data, aerosol level was found appreciably at the altitude of 2 – 4 km. Based on trajectory analysis, main sources of aerosol particles come from South-east Asia biomass burning in Spring. Major sources of aerosol particles are mainly associated with local pollution and Asia outflow pollutants. The aerosol optical depth measured by micro-pulse lidar over the altitude of 3 km in Chung-Li is compared with aerosol optical depth at Mt. Lulin. As the result, the correlation coefficient is 0.91. That is to say, the aerosol optical depth over the altitude of 3 km in Chung-Li is shown the result about 81% by observed at Mt. Lulin. In addition, the aerosol optical depth measured by sunphotometer at Mt. Lulin and in Chung-Li is 0.02 – 0.10、0.12 - 0.94 during the dust event. It means dust effect is weaker at Mt. Lulin. The aerosol optical depth at Mt. Lulin is 0.14 - 0.91 during the biomass burning event. It means the BC concentration is high.
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