대기 (Atmosphere)

  • 제26권2호
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  • Pages.277-288
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  • 2016
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  • 1598-3560(pISSN)
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  • 2288-3266(eISSN)
한국기상학회 (Korean Meteorological Society)
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극 저기압(Polar Low) 통과에 의해 발생한 남극 세종기지 강풍 사례 모의 연구

A Numerical Simulation of Blizzard Caused by Polar Low at King Sejong Station, Antarctica

  • 권하택 (극지연구소 극지기후변화연구부) ;
  • 박상종 (극지연구소 극지기후변화연구부) ;
  • 이솔지 (극지연구소 극지기후변화연구부) ;
  • 김성중 (극지연구소 극지기후변화연구부) ;
  • 김백민 (극지연구소 극지기후변화연구부)
  • Kwon, Hataek (Division of Polar Climate Change, Korea Polar Research Institute) ;
  • Park, Sang-Jong (Division of Polar Climate Change, Korea Polar Research Institute) ;
  • Lee, Solji (Division of Polar Climate Change, Korea Polar Research Institute) ;
  • Kim, Seong-Joong (Division of Polar Climate Change, Korea Polar Research Institute) ;
  • Kim, Baek-Min (Division of Polar Climate Change, Korea Polar Research Institute)
  • 투고 : 2016.02.17
  • 심사 : 2016.03.28
  • 발행 : 2016.06.30
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초록

Polar lows are intense mesoscale cyclones that mainly occur over the sea in polar regions. Owing to their small spatial scale of a diameter less than 1000 km, simulating polar lows is a challenging task. At King Sejong station in West Antartica, polar lows are often observed. Despite the recent significant climatic changes observed over West Antarctica, adequate validation of regional simulations of extreme weather events such as polar lows are rare for this region. To address this gap, simulation results from a recent version of the Polar Weather Research and Forecasting model (Polar WRF) covering Antartic Peninsula at a high horizontal resolution of 3 km are validated against near-surface meteorological observations. We selected a case of high wind speed event on 7 January 2013 recorded at Automatic Meteorological Observation Station (AMOS) in King Sejong station, Antarctica. It is revealed by in situ observations, numerical weather prediction, and reanalysis fields that the synoptic and mesoscale environment of the strong wind event was due to the passage of a strong mesoscale polar low of center pressure 950 hPa. Verifying model results from 3 km grid resolution simulation against AMOS observation showed that high skill in simulating wind speed and surface pressure with a bias of $-1.1m\;s^{-1}$ and -1.2 hPa, respectively. Our evaluation suggests that the Polar WRF can be used as a useful dynamic downscaling tool for the simulation of Antartic weather systems and the near-surface meteorological instruments installed in King Sejong station can provide invaluable data for polar low studies over West Antartica.

키워드

참고문헌

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피인용 문헌

  1. A Numerical Simulation Study of Strong Wind Events at Jangbogo Station, Antarctica vol.26, pp.4, 2016, https://doi.org/10.14191/Atmos.2016.26.4.617