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A Characteristic of Wintertime Snowfall and Minimum Temperature with Respect to Arctic Oscillation in South Korea During 1979~2011

1979~2011년, 북극진동지수 측면에서의 겨울철 남한지역 신적설과 최저 온도 특성

  • Roh, Joon-Woo (Forecast Research Laboratory, National Institute of Meteorological Research, Korea Meteorological Administration) ;
  • Lee, Yong Hee (Forecast Research Laboratory, National Institute of Meteorological Research, Korea Meteorological Administration) ;
  • Choi, Reno K.Y. (Forecast Research Laboratory, National Institute of Meteorological Research, Korea Meteorological Administration) ;
  • Lee, Hee Choon (Forecast Research Laboratory, National Institute of Meteorological Research, Korea Meteorological Administration)
  • 노준우 (국립기상연구소 예보연구과) ;
  • 이용희 (국립기상연구소 예보연구과) ;
  • 최규용 (국립기상연구소 예보연구과) ;
  • 이희춘 (국립기상연구소 예보연구과)
  • Received : 2013.11.04
  • Accepted : 2014.01.09
  • Published : 2014.03.31

Abstract

A characteristic of snowfall and minimum temperature variability in South Korea with respect to the variability of Arctic Oscillation (AO) was investigated. The climatic snowfall regions of South Korea based on daily new fresh snowfall data of 59 Korea Meteorological Administration (KMA) stations data corresponding to the sign of AO index during December to February 1979~2011 were classified. Especially, the differences between snowfalls of eastern regions and that of western regions in South Korea were seen by each mean 1000hPa geopotential height fields, which is one of physical structure, for the selected cases over the East Asia including the Korean Peninsula. Daily minimum temperature variability of 59 KMA station data and daily AO index during the same period were investigated using Cyclo-stationary empirical orthogonal function (CSEOF) analysis. The first CSEOF of wintertime daily AO index and that of minimum temperature of 59 KMA stations explain 33% and 66% of total variability, respectively. Correlation between principal component time series corresponding to the first CSEOF of AO index and that of temperature at the period of 1990s is over about -0.7 when that of AO index leads about 40 days.

Keywords

References

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