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

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Title
A Numerical Simulation of Blizzard caused by Polar Low at King Sejong Station, Antarctica.
Other Titles
극 저기압 통과에 의해 발생한 남극 세종기지 강풍사례 모의연구
Authors
Kwon, Hataek
Kim, Baek-Min
Kim, Seong-Joong
Lee, Solji
Park, Sangjong
Keywords
King Sejong Station; Polar Low; Polar WRF; West Antarctica
Issue Date
2016
Citation
Kwon, Hataek, et al. 2016. A Numerical Simulation of Blizzard caused by Polar Low at King Sejong Station, Antarctica.. The 11th Antarctic Meteorological Observation, Modeling & Forecasting Workshop. The Ohio State University. 2016.06.04~2016.06.11.
Abstract
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 3km grid resolution simulation against AMOS observation showed that high skill in simulating wind speed and surface pressure with a bias of -1.1 m/s 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
URI
http://repository.kopri.re.kr/handle/201206/8318
Conference Name
The 11th Antarctic Meteorological Observation, Modeling & Forecasting Workshop
Conference Place
The Ohio State University
Conference Date
2016.06.04~2016.06.11
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