한국지구과학회지 (Journal of the Korean earth science society)

  • 제30권3호
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  • Pages.282-293
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  • 2009
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  • 1225-6692(pISSN)
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  • 2287-4518(eISSN)
한국지구과학회 (The Korean Earth Science Society)
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매든-줄리안 진동의 위상에 따른 동아시아 지역의 강수와 순환의 변동성

East Asian Precipitation and Circulation Response to the Madden-Julian Oscillation

  • 한상대 (부산대학교 지구환경시스템학부) ;
  • 서경환 (부산대학교 지구환경시스템학부)
  • Han, Sang-Dae (Division of Earth Environmental System, Atmospheric Science Major, Pusan National University) ;
  • Seo, Kyong-Hwan (Division of Earth Environmental System, Atmospheric Science Major, Pusan National University)
  • 발행 : 2009.06.30
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초록

본 연구는 겨울철과 여름철에 8개의 다른 MJO 전파 위상에 따라 동아시아 지역에서 강수와 기온, 순환 아노말리에 대하여 매든-줄리안 진동(MJO)/계절내 진동(ISO)의 영향에 대하여 고찰하였다. MJO의 중심이 동인도양에 위치한 3번 위상과 MJO의 중심이 서반구에 위치한 8번 위상에서 한반도의 겨울철 강수 패턴이 비선형적으로 나타난다. 이 두 위상에서 MJO의 강도가 2보다 작은 경우 양의 아노말리가 나타나는 반면에 2보다 큰 경우 음의 강수 아노말리가 나타났다. MJO 강도가 클 때 나타나는 이러한 음의 강수 아노말리는 한반도가 고기압성 아노말리 영역에 놓이고 북풍계열의 바람에 의한 한랭 건조한 바람의 이류에 의해 형성된다. 또한 본 연구에서는 여름철 ISO의 동진 및 북진 전파 위상에 따른 강수와 순환의 반응을 연구하였다.

This study examines the effects of the Madden-Julian oscillation (MJO) or the Intraseasonal Oscillation (ISO) on precipitation, temperature and circulation anomalies over East Asia according to the eight different MJO phases during the winter and summer seasons. A nonlinear response appears the wintertime precipitation pattern during the phase of 3 (where the MJO center is located over the Eastern Indian Ocean) and 8 (where the MJO center is located over the Western Hemisphere) over the Korean Peninsula. That is, for these phases, the positive precipitation anomalies appear for the MJO intensity less than 2 standard deviations while the negative precipitation anomalies appear in the case of the MJO intensity greater than 2 standard deviations. The negative precipitation anomaly in the latter case is duandard d stronger anomalous anticyclone formed over the Korean Peninsula and cold and dry advection by northerly winds. The response of precipitation and circulation to the boreal summer ISO is also investigated.

키워드

참고문헌

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피인용 문헌

  1. Changes in weather and climate extremes over Korea and possible causes: A review vol.51, pp.2, 2015, https://doi.org/10.1007/s13143-015-0066-5