中大機構典藏-NCU Institutional Repository-提供博碩士論文、考古題、期刊論文、研究計畫等下載:Item 987654321/27731
English  |  正體中文  |  简体中文  |  全文筆數/總筆數 : 70588/70588 (100%)
造訪人次 : 23101417      線上人數 : 613
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
搜尋範圍 查詢小技巧:
  • 您可在西文檢索詞彙前後加上"雙引號",以獲取較精準的檢索結果
  • 若欲以作者姓名搜尋,建議至進階搜尋限定作者欄位,可獲得較完整資料
  • 進階搜尋


    請使用永久網址來引用或連結此文件: http://ir.lib.ncu.edu.tw/handle/987654321/27731


    題名: Long-range southeastward transport of Asian biosmoke pollution: Signature detected by aerosol potassium in Northern Taiwan
    作者: Hsu,SC;Liu,SC;Huang,YT;Chou,CCK;Lung,SCC;Liu,TH;Tu,JY;Tsai,FJ
    貢獻者: 環境研究中心
    關鍵詞: LEAD-ISOTOPE RATIOS;TRACE-P EXPERIMENT;CHEMICAL-COMPOSITION;AIR-POLLUTANTS;DUST PARTICLES;CONTINENTAL OUTFLOW;CARBON EMISSIONS;IONIC COMPONENTS;COAL COMBUSTION;PM2.5 AEROSOLS
    日期: 2009
    上傳時間: 2010-06-29 19:14:54 (UTC+8)
    出版者: 中央大學
    摘要: Total potassium was determined in aerosol particles between 2002 and early 2007 in northern Taiwan (25 degrees 02'N, 121 degrees 31'E). Biosmoke potassium (non-sea-salt/noncrustal) was assessed and used as a tracer of biosmoke pollution, which essentially represents the combination of coal and biofuel combustion and biomass burning. PM10-associated potassium displays a typical seasonality, peaking during the winter and waning during the summer. The size distribution showed a bimodal pattern, peaking at a supermicron size (2.5-5.6 mu m) and at around 1 mu m, demonstrating multiple sources. Size distribution patterns revealed an evident seasonality, indicative of the different domination of natural and biosmoke sources in the two main periods of the northeasterly and summer monsoons, respectively. The relative contributions of biosmoke and natural sources to the total potassium were estimated to be 50-75% and 25-50%, respectively; the seasonality of biosmoke potassium is similar to that of total potassium. Substantial correlations existed between biosmoke potassium and selected trace metals (As, Se, Pb, and Mn), suggesting that the latter are essentially associated with biosmoke pollution. Another significant finding is that the seasonal mean concentrations of aerosol potassium between 2002 and early 2007 tend to increase. This could primarily be attributed to the increased consumption of coal in China, posing an urgent issue relevant to pollution mitigation in China. The southward inflow flux of biosmoke potassium to the south of 25 degrees N during the northeasterly monsoon months has been estimated to be 56-79 mg m(-2) d(-1), which could be applied to the assessment of other biosmoke-related species.
    關聯: JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
    顯示於類別:[環境研究中心] 期刊論文

    文件中的檔案:

    檔案 描述 大小格式瀏覽次數
    index.html0KbHTML1256檢視/開啟


    在NCUIR中所有的資料項目都受到原著作權保護.

    社群 sharing

    ::: Copyright National Central University. | 國立中央大學圖書館版權所有 | 收藏本站 | 設為首頁 | 最佳瀏覽畫面: 1024*768 | 建站日期:8-24-2009 :::
    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - 回饋  - 隱私權政策聲明