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A Numerical Simulation of Blizzard Caused by Polar Low at King Sejong Station, Antarctica
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  • Journal title : Atmosphere
  • Volume 26, Issue 2,  2016, pp.277-288
  • Publisher : Korean Meteorological Society
  • DOI : 10.14191/Atmos.2016.26.2.277
 Title & Authors
A Numerical Simulation of Blizzard Caused by Polar Low at King Sejong Station, Antarctica
Kwon, Hataek; Park, Sang-Jong; Lee, Solji; Kim, Seong-Joong; Kim, Baek-Min;
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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 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.
Polar WRF;West Antartica;King Sejong station;polar low;
 Cited by
남극 장보고기지 주변 강풍사례 모의 연구,권하택;김신우;이솔지;박상종;최태진;정지훈;김성중;김백민;

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