| 摘要: | 本計畫規劃未來一年在鹿林山大氣背景站及越南Yen Bai觀測傳輸氣膠，包括觀測區域背景及事件(中南半島生質燃燒和亞洲大陸霧霾長程傳輸污染)影響時段PM2.5氣膠物理化學成分濃度。此外，配合總計畫於2020年中南半島生質燃燒期間(3~4月)進行7-SEAS第三次大型春季觀測實驗，本計畫以手動採樣觀測大氣氣膠質量濃度、水溶性無機離子、二元酸及其鹽類、碳成分、水可溶有機碳、脫水醣類、似腐植質成分。在自動儀器觀測方面，本計畫將觀測鹿林山雲霧事件、生質燃燒事件、背景環境在短時間(20分鐘)氣膠水溶性離子濃度和氣膠含水量變化。監測成果配合鹿林山氣膠光學監測資料，將可比較事件和非事件(區域背景)時段氣膠化學及光學特性差異，以評估亞洲大陸污染輸出影響。總結來說，本計畫將以全方位完整的監測數據探討東亞背景大氣、傳輸生質燃燒氣團、傳輸大陸霧霾、以及雲霧事件前、後期間氣膠化學特性變化，並以氣膠化學成分代入Revised IMPROVE方程式解析出PM2.5化學成分對氣膠光學效應。同時，以熱力學平衡模式ISSOROPIAII瞭解氣膠pH值對氣膠含水量的影響以及量測氣膠含水量和模式估算值的差異。形成的觀測數據可提供模式模擬大氣氣膠化學和光學特性，並進一步評估東亞地區氣膠—雲—輻射—氣候交互作用。 ;This study proposes to observe long-range transported aerosol at the Mountain Lulin (2,862 m) atmospheric background station (LABS) and the Yen Bai (Northern Viet Nam) site for the next year. The observation includes physical and chemical properties of atmospheric aerosols during regional background and event periods (influenced by long-range transport of Indochina biomass burning (BB) smoke and Asian Haze). In addition, this study will collaborate with general project to execute the third 7-SEAS Spring Observation Campaign in spring (March-April) 2020. Among various activities, this study will collect atmospheric aerosols to observe PM2.5 mass concentration, water-soluble inorganic ions,dicarboxylic acids and their salts, carbonaceous content, water-soluble organic carbon, humic like substance, and anhydrosugars. For the aspect of automated instruments, this study will evaluate the integrated short-interval (20 min) relationship among aerosol water content, aerosol optical coefficients, and water soluble inorganic ions. The observation results will contrast the differences of aerosol optical characteristics between event (BB smoke transport, cloud/fog occurrence, and Asian Haze outflow) and non-event (regional background) periods to assess Asian Continent pollution outflow. In summary, this study will utilize the acquired comprehensive data to investigate aerosol optical properties of background air in the East Asia, transported BB air masses, and pre- and postcloud event at Mountain Lulin. Moreover, this study will evaluate aerosol optical properties by inserting PM2.5 chemical properties into the Revised IMPROVE equation. Meanwhile, the application of thermodynamic equilibrium model ISSOROPIA II can help reveal the influence of aerosol pH value on aerosol water content and the difference between modeled and measured aerosol water content. The observed data combining with previous findings can further provide aerosol chemical and optical properties for computer modelers to assess aerosolcloud-radiation-climate interaction in the East Asia. |
