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Climatic Features of Extratropical Cyclones During the Spring-time Yellow Dust Events in Korea

한반도 봄철 황사 발생시 동아시아 온대저기압의 기후학적 특징

  • Lee, Jaeyeon (School of Earth and Environmental Sciences, Seoul National University) ;
  • Kim, Junsu (National Institute of Meteorological Sciences) ;
  • Son, Seok-Woo (School of Earth and Environmental Sciences, Seoul National University)
  • 이재연 (서울대학교 지구환경과학부) ;
  • 김준수 (국립기상과학원 수치모델연구부 수치모델개발과) ;
  • 손석우 (서울대학교 지구환경과학부)
  • Received : 2016.06.21
  • Accepted : 2016.09.22
  • Published : 2016.12.31

Abstract

The yellow dust events in Korea are often associated with extratropical cyclones (ETCs) that travel across the source regions of yellow dusts. Although such synoptic patterns are well documented, climatic features of ETCs themselves during the yellow dust events are not well understood. The present study reports climatic features of spring-time ETCs, which accompany the yellow dust events in Korea, by tracking individual ETCs with an automated tracking algorithm. By analyzing Lagrangian tracks of ETCs from 1979 to 2014, it is found that, during yellow dust events, ETCs are located around Vladivostok, Russia. They are typically originated from the leeside of Altai-Sayan mountains about three days before the onset of the yellow dust events, and travel either eastward or southeastward in time. While their tracks are not unusual, they grow faster over the source regions of the yellow dusts, possibly lifting desert dusts above the planetary boundary layer, and further develop slowly as they travel eastward.

Acknowledgement

Grant : 동아시아 이동성 저기압의 종관-기후학적 특성 분석 및 예측성 평가

Supported by : 한국기상산업진흥원

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