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Content Provider | World Health Organization (WHO)-Global Index Medicus |
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Author | Chan, Chang-Chuan Ni, Pei-Cheng Chuang, Ming-Tung Jang, Carey J. Lee, Chung-Te Fu, Joshua S. |
Spatial Coverage | China Taiwan |
Description | Country affiliation: Taiwan Author Affiliation: Chuang MT ( Graduate Institute of Environmental Engineering, National Central University Jhongli, Taoyuan, Taiwan.) |
Abstract | Aerosol is frequently transported by a southward high-pressure system from the Asian Continent to Taiwan and had been recorded a 100% increase in mass level compared to non-event days from 2002 to 2005. During this time period, PM2.5 sulfate was found to increase as high as 155% on event days as compared to non-event days. In this study, Asian emission estimations, Taiwan Emission Database System (TEDS), and meteorological simulation results from the fifth-generation Mesoscale Model (MM5) were used as inputs for the Community Multiscale Air Quality (CMAQ) model to simulate a long-range transport of PM2.5 event in a southward high-pressure system from the Asian Continent to Taiwan. The simulation on aerosol mass level and the associated aerosol components were found within a reasonable accuracy. During the transport process, the percentage of semi-volatile PM2.5 organic carbon in PM2.5 plume only slightly decreased from 22-24% in Shanghai to 21% near Taiwan. However, the percentage of PM2.5 nitrate in PM2.5 decreased from 16-25% to 1%. In contrast, the percentage of PM2.5 sulfate in PM2.5 increased from 16-19% to 35%. It is interesting to note that the percentage of PM2.5 ammonium and PM2.5 elemental carbon in PM2.5 remained nearly constant. Simulation results revealed that transported pollutants dominate the air quality in Taipei when the southward high-pressure system moved to Taiwan. Such condition demonstrates the dynamic chemical transformation of pollutants during the transport process from continental origin over the sea area and to the downwind land. |
ISSN | 00489697 |
Issue Number | 1-2 |
Volume Number | 406 |
e-ISSN | 18791026 |
Journal | Science of The Total Environment |
Language | English |
Publisher | Elsevier |
Publisher Date | 2008-11-15 |
Publisher Place | Netherlands |
Access Restriction | Subscribed |
Subject Keyword | Aerosols Analysis Air Movements Air Pollutants Atmospheric Pressure Environmental Monitoring Particulate Matter Chemistry Carbon China Computer Simulation Geography Models, Theoretical Particle Size Quaternary Ammonium Compounds Taiwan Time Factors Journal Article Research Support, Non-u.s. Gov't Discipline Environmental Science |
Content Type | Text |
Resource Type | Article |
Subject Domain (in MeSH) | Inorganic Chemicals Complex Mixtures Chemical Actions and Uses Investigative Techniques Physical Phenomena Chemical Phenomena Biological Phenomena Natural Science Disciplines Information Science Environment and Public Health Geographic Locations |
Subject | Environmental Engineering Environmental Chemistry Pollution Waste Management and Disposal |
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