English  |  正體中文  |  简体中文  |  Items with full text/Total items : 67621/67621 (100%)
Visitors : 23065551      Online Users : 168
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
Scope Tips:
  • please add "double quotation mark" for query phrases to get precise results
  • please goto advance search for comprehansive author search
  • Adv. Search
    HomeLoginUploadHelpAboutAdminister Goto mobile version


    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/27731


    Title: Long-range southeastward transport of Asian biosmoke pollution: Signature detected by aerosol potassium in Northern Taiwan
    Authors: Hsu,SC;Liu,SC;Huang,YT;Chou,CCK;Lung,SCC;Liu,TH;Tu,JY;Tsai,FJ
    Contributors: 環境研究中心
    Keywords: LEAD-ISOTOPE RATIOS;TRACE-P EXPERIMENT;CHEMICAL-COMPOSITION;AIR-POLLUTANTS;DUST PARTICLES;CONTINENTAL OUTFLOW;CARBON EMISSIONS;IONIC COMPONENTS;COAL COMBUSTION;PM2.5 AEROSOLS
    Date: 2009
    Issue Date: 2010-06-29 19:14:54 (UTC+8)
    Publisher: 中央大學
    Abstract: 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.
    Relation: JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
    Appears in Collections:[環境研究中心] 期刊論文

    Files in This Item:

    File Description SizeFormat
    index.html0KbHTML1162View/Open


    All items in NCUIR are protected by copyright, with all rights reserved.

    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 ©   - Feedback  - 隱私權政策聲明