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Korean Meteorological Society (한국기상학회)
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Revisit the Cause of the Cold Surge in Jeju Island Accompanied by Heavy Snow in January 2016

2016년 1월 폭설을 동반한 제주도 한파의 원인 재고찰

  • Han, Kwang-Hee (Division of Earth Environmental System Science Major of Environmental Atmospheric Sciences, Pukyong National University) ;
  • Ku, Ho-Young (Division of Earth Environmental System Science Major of Environmental Atmospheric Sciences, Pukyong National University) ;
  • Bae, Hyo-Jun (Division of Earth Environmental System Science Major of Environmental Atmospheric Sciences, Pukyong National University) ;
  • Kim, Baek-Min (Division of Earth Environmental System Science Major of Environmental Atmospheric Sciences, Pukyong National University)
  • 한광희 (부경대학교 지구환경시스템과학부 환경대기과학 전공) ;
  • 구호영 (부경대학교 지구환경시스템과학부 환경대기과학 전공) ;
  • 배효준 (부경대학교 지구환경시스템과학부 환경대기과학 전공) ;
  • 김백민 (부경대학교 지구환경시스템과학부 환경대기과학 전공)
  • Received : 2022.06.07
  • Accepted : 2022.08.27
  • Published : 2022.09.30
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Abstract

In Jeju, on January 23, 2016, a cold surge accompanied by heavy snowfall with the most significant amount of 12 cm was the highest record in 32 years. During this period, the temperature of 850 hPa in January was the lowest in 2016. Notably, in 2016, the average surface temperature of January on the Polar cap was the highest since 1991, and 500 hPa geopotential height also showed the highest value. With this condition, the polar vortex in the northern hemisphere meandered and expanded into the subtropics regionally, covering the Korean Peninsula with very high potential vorticity up to 7 Potential Vorticity Unit. As a result, the strong cold advection, mostly driven by a northerly wind, around the Korean Peninsula occurred at over 2𝜎. Previous studies have not addressed this extreme synoptic condition linked to polar vortex expansion due to the unprecedented Arctic warming. We suggest that the occurrence of a strong Ural blocking event after the abrupt warming of the Barents/Karas seas is a major cause of unusually strong cold advection. With a specified mesoscale model simulation with SST (Sea Surface Temperature), we also show that the warmer SST condition near the Korean Peninsula contributed to the heavy snowfall event on Jeju Island.

Keywords

Acknowledgement

본 논문의 개선을 위해 좋은 의견을 제시해 주신 두 분의 심사위원께 감사를 드립니다. 이 논문은 부경대학교 자율창의학술연구비(2020년)에 의하여 연구되었습니다.

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