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한국환경과학회지 = Journal of the environmental sciences v.11 no.2, 2002년, pp.111 - 120   피인용횟수: 2

Asian Dust Transport during Blocking Episode Days over Korea

Moon, Yun-Seob   (Department of Physics, University of TorontoUU0014405  ); Kim, berly-Strong   (Department of Physics, University of TorontoUU0014405  ); Kim, Yoo-Keun   (Department of Atmospheic Sciences, Pusan National UniversityUU0000613  ); Lim, Yun-Kyu   (Department of Atmospheic Sciences, Pusan National UniversityUU0000613  ); Oh, In-Bo   (Department of Atmospheic Sciences, Pusan National UniversityUU0000613  ); Song, Sang-Keun   (Department of Atmospheic Sciences, Pusan National UniversityUU0000613  ); Bae, Joo-Hyon   (Department of Atmospheic Sciences, Pusan National UniversityUU0000613  );
  • 초록

    Asian dust(or yellow sand) occurs mainly in spring and occasionally in winter in east Asia, when the weather conditions are under an upper trough/cut-off low and surface high/low pressure system during blocking episode days associated with the stationary patterns of the upper level jet stream. The transport mechanism for Asian dust during the blocking episode days in spring 2001 was analyzed using the TOMS aerosol index and meteorological mesoscale model 5(MM5). Based on the E vector, an extension of an Eliassen-Palm flux, the blocking episode days were found to be associated with the development of an upper cut-off low and surface cyclones. Concurrently, the occurrence of dust storms was also determined by strong cold advection at the rear of a jet streak, which exhibited a maximum wind speed within the upper jet stream. As such, the transport mechanism for Asian dust from China was due to advection of the isentropic potential vorticity(IPV) and isentropic surfaces associated with tropopause folding. The transport heights for Asian dust during the blocking episode days were found to be associated with the distribution of the isentropes below the IPV At the same time, lee waves propagated by topography affected the downward motion and blocking of Asian dust in China. The Asian dust transported from the dust source regions was deposited by fallout and rain-out with a reinforcing frontogenesis within a surface cyclone, as determined from satellite images using TOMS and GMS5. Accordingly, these results emphasize the importance of forecasting jet streaks, the IPV, and isentropes with geopotential heights in east Asia.


  • 주제어

    Asian dust .   the upper trough/cut-off low .   blocking episode .   E vector .   isentropic potential vorticity .   surface front .   and cyclone.  

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  • 이 논문을 인용한 문헌 (2)

    1. 2004. "Characteristics of Concentration Variations and Synoptic Conditions by the Lasting Time of Asian Dust" 한국대기환경학회지 = Journal of Korean Society for Atmospheric Environment, 20(4): 465~481     
    2. Moon, Yun-Seob ; Lim, Yun-Kyu ; Lee, Kang-Yeol 2011. "An Estimation of Concentration of Asian Dust (PM10) Using WRF-SMOKE-CMAQ (MADRID) During Springtime in the Korean Peninsula" 한국지구과학회지 = Journal of the Korean Earth Science Society, 32(3): 276~293     

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