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KMID : 1024520120210030327
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Journal of the Environmental Sciences
2012 Volume.21 No. 3 p.327 ~ p.337
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Analysis of Seasonal Air Parcel Movement Pattern in South-Eastern Part of the Korean Peninsula Using WRF/FLEXPART
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Lee Hyeon-Mi
Lee Hwa-Woon
Lee Soon-Hwan
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Abstract
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Air pollution inventories are aggregated around south-eastern part of the Korean Peninsular including Busan, Ulsan, and Changwon cities. Because densely populated cities are concentrated in this region, air pollutants emitted from one of these cities tend to be impacted on the air quality of other cities. In order to clarify the seasonal movement pattern of emitted particles, several numerical simulations using WRF/FLEXPART were carried out. Four cases were selected for each season. The Weather Research and Forecasting model (WRF) reproduced atmospheric flow fields with nested grids. The seasonal pattern of air mass of study area was determined by backward and forward trajectories. As a result, the air parcel moves from northwest to southeast due to northwesterly winds in spring and winter. Also air parcel transports from south to north in summer, and moves from west to east. Because the air mass moves differently in each season, these characteristics should be considered when performing air quality analysis.
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KEYWORD
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WRF, FLEXPART, Trajectory analysis, Particle movement, Seasonal wind
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