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Surface and Upper-Level Features Associated with Wintertime Cold Surge Outbreaks in South Korea


doi: 10.1007/BF02918484

  • The surface and upper-level features associated with a sharp drop of wintertime daily temperature over South Korea is investigated in this study. This sharp drop in daily temperature is called a cold surge and is one of the most hazardous weather phenomena in East Asian winters. An upper-level baroclinic wave of 60° wavelength propagating eastward at a phase speed of 12° longitude per day across the continent of northern China from the west of Lake Baikal toward the eastern coast of China causes the outbreak of cold air over South Korea. The cooling associated with the upper-level baroclinic wave is found at all altitudes under the geopotential height-fall center near the tropopause. The development in the ridge seems to derive the early evolution of the eastward-propagating sinusoidal wave, whereas the trough is connected directly with the tropospheric temperature-drop. An enhancement of the wintertime East Asian jet stream after the outbreak of a cold surge is a response to the steep temperature gradient associated with the developing baroclinic wave.
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    [2] LI Qiaoping, DING Yihui, DONG Wenjie, YAN Guanhua, 2007: A Numerical Study on the Winter Monsoon and Cold Surge over East Asia, ADVANCES IN ATMOSPHERIC SCIENCES, 24, 664-678.  doi: 10.1007/s00376-007-0664-y
    [3] CHENG Xue-Ling, HUANG Jian, WU Lin, ZENG Qing-Cun, 2015: Structures and Characteristics of the Windy Atmospheric Boundary Layer in the South China Sea Region during Cold Surges, ADVANCES IN ATMOSPHERIC SCIENCES, 32, 772-782.  doi: 10.1007/s00376-014-4228-7
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Manuscript History

Manuscript received: 10 July 2005
Manuscript revised: 10 July 2005
通讯作者: 陈斌, bchen63@163.com
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Surface and Upper-Level Features Associated with Wintertime Cold Surge Outbreaks in South Korea

  • 1. Meteorological Research Institute, Korea Meteorological Administration, Seoul 156-720,Meteorological Research Institute, Korea Meteorological Administration, Seoul 156-720,School of Earth and Environment Sciences, Seoul National University, Seoul 156-720

Abstract: The surface and upper-level features associated with a sharp drop of wintertime daily temperature over South Korea is investigated in this study. This sharp drop in daily temperature is called a cold surge and is one of the most hazardous weather phenomena in East Asian winters. An upper-level baroclinic wave of 60° wavelength propagating eastward at a phase speed of 12° longitude per day across the continent of northern China from the west of Lake Baikal toward the eastern coast of China causes the outbreak of cold air over South Korea. The cooling associated with the upper-level baroclinic wave is found at all altitudes under the geopotential height-fall center near the tropopause. The development in the ridge seems to derive the early evolution of the eastward-propagating sinusoidal wave, whereas the trough is connected directly with the tropospheric temperature-drop. An enhancement of the wintertime East Asian jet stream after the outbreak of a cold surge is a response to the steep temperature gradient associated with the developing baroclinic wave.

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