globalchange  > 气候变化事实与影响
DOI: 10.1016/j.atmosenv.2014.01.065
Scopus记录号: 2-s2.0-84897624952
论文题名:
Modeling direct and indirect effect of long range transport on atmospheric PM2.5 levels
作者: Chen T; -F; , Chang K; -H; , Tsai C; -Y
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 89
起始页码: 1
结束页码: 9
语种: 英语
英文关键词: CMAQ v4.6 model ; Direct long range transport (LRT) ; East Asia contribution ; Emission control strategy ; Indirect LRT
Scopus关键词: Adverse effect ; Annual average ; East Asia ; Indirect effects ; Indirect LRT ; Long range transport ; Meso-scale modeling ; Zero emission ; Air quality ; Emission control ; Atmospheric movements ; ammonia ; nitric acid ; air quality ; atmospheric pollution ; particulate matter ; pollutant transport ; pollution incidence ; pollution monitoring ; simulation ; transport process ; air particle control ; air pollutant ; air quality ; article ; atmospheric dispersion ; model ; particulate matter ; priority journal ; simulation ; Taiwan ; Far East ; Taiwan
Scopus学科分类: Environmental Science: Water Science and Technology ; Earth and Planetary Sciences: Earth-Surface Processes ; Environmental Science: Environmental Chemistry
英文摘要: The adverse effect of long range transport (LRT) of pollutants on local air quality has been long recognized. Previous studies only cover LRT effect without distinguishing direct and indirect effect, that is LRT of precursors directly forming PM2.5 in local areas (direct effect) and/or transported precursors interacting with local precursors in forming PM2.5 (indirect effect). The present study aims to simulate effects of East Asia emissions in PM2.5 levels in Taiwan by quantifying the direct and indirect effects. The modeling system included simulations of 4 cases: (A) Base: consider emission from both Taiwan and East Asia; (B) Zero Emission from East Asia: consider Taiwan emission only without considering emission from East Asia; (C) Zero Emission from Taiwan: consider East Asia emission only without emission from Taiwan; and (D) Zero Emission (background). The results of the CMAQ v4.6 model (with Mesoscale Model ver. 5) indicate that the contributions to annual PM2.5 average of 30μgm-3 in Taiwan are 60, 27, 9, 3%, respectively, from Taiwan's own contribution, direct LRT, indirect LRT and background. The primary PM2.5 is almost from Taiwan's contribution whereas only 45% secondary PM2.5 (SPM2.5) is from Taiwan and the majority (53%) from LRT contribution (direct LRT 35% with indirect LRT 19%). As for composition in SPM2.5, SO42- accounts for 43% with the major contribution from direct LRT (57%), followed by NH4+ (32%). NO3- is mostly from Taiwan's contribution (57%) with indirect LRT contribution of 36%. Indirect contribution of NH4+ is 24% in the form of NH4NO3. Clearly Taiwan cannot control direct contribution (SO42-), but control of NO3- and NH4+ may reduce PM2.5 levels. To meet the proposed annual average of 15μgm-3, it is certainly a challenging task in that 30% emission should be reduced in Taiwan, preferably the reduction of NOX and primary PM. © 2014 Elsevier Ltd.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/80670
Appears in Collections:气候变化事实与影响

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作者单位: Department of Safety, Health and Environmental Engineering, National Yunlin University of Science and Technology, Touliu, Yunlin, Taiwan

Recommended Citation:
Chen T,-F,, Chang K,et al. Modeling direct and indirect effect of long range transport on atmospheric PM2.5 levels[J]. Atmospheric Environment,2014-01-01,89
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