109

8,400 千元

空氣品質管理

2020/03/25

2020/12/31

呂世宗

空保處

周文安

國立中央大學

大氣空氣

長程輸送、酸雨、大氣汞

long-range transport, acid rain, atmospheric mercury

林登秋；許桂榮；彭啟明

林能暉

曾韋迪

03-4227151#65504

weiti.tseng@g.ncu.edu.tw

本報告研究目的為 (1) 維護台灣酸雨監測網，進行長期監測與資料分析；(2) 持續進行大氣汞溼沉降監測網，進行監測數據分析；(3) 應用區域大氣模式整合系統，模擬評估台灣環境受局部或區域大氣污染物輸送之衝擊，提供環保署進行空氣品質管理與進行國際跨境污染傳輸責任歸屬評估決策之參考；(4) 針對空氣品質異常事件，修正事故發生時之空氣品質統計數值； (5)評估酸雨及酸性雲霧對台灣生態環境系統營養循環影響；(6)更新與維護台灣酸雨資訊網；(7)積極推動及參與區域大氣污染相關議題之國際合作與技術交流。本年度研究重點成果如下： a.全國14座酸雨測站共採集到1200個樣本。pH值分布上，全國14站pH值多在5.0以上，全國pH值平均為5.60，高於酸雨pH值之標準(pH < 5)，顯示雨水酸化情況已見改善，唯南北兩地雨水酸化的程度差異仍然存在。 b.全國12座汞溼沉降共採得445個雨水樣品進行總汞分析。各測站之雨水樣品總汞濃度介於2.3與68.0 ng L-1；各測站之雨水汞權重平均濃度介於7.5 ng L-1與24.1 ng L-1，鞍部站與宜蘭站最低，高雄站最高。目前我國雨水汞濃度並未高於與其他國家。 c.更新台灣酸雨網頁(https://acidrain.epa.gov.tw/)，新增即時或近期之全球酸雨及環保相關議題之新聞等更多資訊。 d.持續參與聯合國全球降水化學及沉降科學評估資料庫以及聯合國全球降水化學監測網品保中心全球比對。

長程輸送、酸雨、大氣汞

全國酸雨期末成果報告正式定稿.pdf

28MB

期末成果報告正式定稿

2021/4/30 上午 12:00:00

The goals of this study are (1) to maintain acid deposition network for conducting a long-term monitoring and data analysis, (2) to maintain the integrated atmospheric mercury monitoring network and analyze the data, (3) to establish and maintain an integrated atmospheric modeling system for studying the long-range transport of air pollutants and local air pollutants in order to assess their impact to Taiwan air quality, and further to provide fundamental information to EPA for air pollution management, (4) to recalculate the AQI index when extreme air pollution events occur in order to highlight the contribution from local air pollutants and provide a reference for the EPA, (5) to investigate the impact of acid rain and fog acidity to the ecosystem’s nutrient cycling, (6) to update and maintain the web site of Taiwan’s acid rain, (7) to promote international cooperation and technical exchanges on regional air pollutant transport issues. To date, our achievements are highlighted below: a.1200 samples were collected from 14 acid deposition stations all over Taiwan in 2020. The average pH for all the samples was 5.60. The acid rain situation in Taiwan has slightly improved. The annual average pH values for most of the sites are greater than 5.0. Annual average pH values at Northern Taiwan sites are still lower than in southern Taiwan. b.445 samples were collected from 12 mercury wet deposition stations all over Taiwan in 2020. The total mercury concentration from each station was between 2.3– 68.0 ng L-1. The weighted mean mercury concentration was between 7.5 – 24.1 ng L-1, with the lowest at Anbu and Yilan station and the highest at Kaoshiung station. This range of mercury concentration in Taiwan is now lower than the vast majority of countries worldwide. c.The web site (https://acidrain.epa.gov.tw/) for Taiwan’s acid rain studies has been updated with more information. d.We have continued to promote and participated in international collaborations and technical exchanges, for example with Quality Assurance Science Activity Center of UN, and the World Meteorological Organization Global Precipitation Chemistry and Deposition Science Assessment.

long-range transport, acid rain, atmospheric mercury