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Korean Meteorological Society (한국기상학회)
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The Effects of Atmospheric River Landfalls on Precipitation and Temperature in Korea

Atmospheric River 상륙이 한반도 강수와 기온에 미치는 영향 연구

  • Moon, Hyejin (Climate Research Division, National Institute of Meteorological Sciences) ;
  • Kim, Jinwon (Climate Research Division, National Institute of Meteorological Sciences) ;
  • Guan, Bin (Jet Propulsion Laboratory, California Institute of Technology) ;
  • Waliser, Duane E. (Joint Institute for Regional Earth System Science and Engineering, University of California) ;
  • Choi, Juntae (Climate Research Division, National Institute of Meteorological Sciences) ;
  • Goo, Tae-Young (Climate Research Division, National Institute of Meteorological Sciences) ;
  • Kim, Youngmi (Climate Research Division, National Institute of Meteorological Sciences) ;
  • Byun, Young-Hwa (Climate Research Division, National Institute of Meteorological Sciences)
  • 문혜진 (국립기상과학원 기후연구과) ;
  • 김진원 (국립기상과학원 기후연구과) ;
  • ;
  • ;
  • 최준태 (국립기상과학원 기후연구과) ;
  • 구태영 (국립기상과학원 기후연구과) ;
  • 김영미 (국립기상과학원 기후연구과) ;
  • 변영화 (국립기상과학원 기후연구과)
  • Received : 2019.06.04
  • Accepted : 2019.09.25
  • Published : 2019.11.30
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Abstract

The seasonal climatology of atmospheric rivers (ARs) and their effects on the seasonal precipitation and temperature in Korea are examined using the AR chronology obtained by a methodology based on the vertically integrated water vapor transport (IVT) in conjunction with a fine-scale gridded analysis of station precipitation and temperature. ARs are found to affect Korea most heavily in the warm season with minimal impacts in winter. This contrasts the AR effects in the western North America and the Western Europe that are affected most in winters. Significant portions of precipitation in Korea are associated with AR landfalls for all seasons; over 35% (25%) of the summer (winter) rainfall in the southern part of the Korean peninsula. The percentage of AR precipitation over Korea decreases rapidly towards the north. AR landfalls are also associated with heavier-than-normal precipitation events for all seasons. AR landfalls are associated with above-normal temperatures in Korea; the warm anomalies increase towards the north. The warm anomalies during AR landfalls are primarily related to the reduction in cold episodes as the AR landfalls in Korea are accompanied by anomalous southerlies/southwesterlies.

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References

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