대기 (Atmosphere)

  • 제26권4호
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  • Pages.617-633
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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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남극 장보고기지 주변 강풍사례 모의 연구

A Numerical Simulation Study of Strong Wind Events at Jangbogo Station, Antarctica

  • 권하택 (극지연구소 극지기후과학연구부) ;
  • 김신우 (극지연구소 북극해빙예측사업단) ;
  • 이솔지 (극지연구소 북극해빙예측사업단) ;
  • 박상종 (극지연구소 극지기후과학연구부) ;
  • 최태진 (극지연구소 극지기후과학연구부) ;
  • 정지훈 (전남대학교 해양학과) ;
  • 김성중 (극지연구소 극지기후과학연구부) ;
  • 김백민 (극지연구소 북극해빙예측사업단)
  • Kwon, Hataek (Division of Polar Climate Sciences, Korea Polar Research Institute) ;
  • Kim, Shin-Woo (Unit of Arctic Sea-Ice Prediction, Korea Polar Research Institute) ;
  • Lee, Solji (Unit of Arctic Sea-Ice Prediction, Korea Polar Research Institute) ;
  • Park, Sang-Jong (Division of Polar Climate Sciences, Korea Polar Research Institute) ;
  • Choi, Taejin (Division of Polar Climate Sciences, Korea Polar Research Institute) ;
  • Jeong, Jee-Hoon (Department of Oceanography, Chonnam National University) ;
  • Kim, Seong-Joong (Division of Polar Climate Sciences, Korea Polar Research Institute) ;
  • Kim, Baek-Min (Unit of Arctic Sea-Ice Prediction, Korea Polar Research Institute)
  • 투고 : 2016.07.29
  • 심사 : 2016.10.13
  • 발행 : 2016.12.31
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초록

Jangbogo station is located in Terra Nova Bay over the East Antarctica, which is often affected by individual storms moving along nearby storm tracks and a katabatic flow from the continental interior towards the coast. A numerical simulation for two strong wind events of maximum instantaneous wind speed ($41.17m\;s^{-1}$) and daily mean wind speed ($23.92m\;s^{-1}$) at Jangbogo station are conducted using the polar-optimized version of Weather Research and Forecasting model (Polar WRF). Verifying model results from 3 km grid resolution simulation against AWS observation at Jangbogo station, the case of maximum instantaneous wind speed is relatively simulated well with high skill in wind with a bias of $-3.3m\;s^{-1}$ and standard deviation of $5.4m\;s^{-1}$. The case of maximum daily mean wind speed showed comparatively lower accuracy for the simulation of wind speed with a bias of -7.0 m/s and standard deviation of $8.6m\;s^{-1}$. From the analysis, it is revealed that the each case has different origins for strong wind. The highest maximum instantaneous wind case is caused by the approach of the strong synoptic low pressure system moving toward Terra Nova Bay from North and the other daily wind maximum speed case is mainly caused by the katabatic flow from the interiors of Terra Nova Bay towards the coast. Our evaluation suggests that the Polar WRF can be used as a useful dynamic downscaling tool for the simulation and investigation of high wind events at Jangbogo station. However, additional efforts in utilizing the high resolution terrain is required to reduce the simulation error of high wind mainly caused by katabatic flow, which is received a lot of influence of the surrounding terrain.

키워드

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