Journal of the Korean earth science society (한국지구과학회지)

The Korean Earth Science Society (한국지구과학회)
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A Simple Introduction of Extratropical Transition of Tropical Cyclone (TC) and a Case Study on the Latest Three TCs: Shanshan (0613), Yaki (0614), and Soulik (0618)

태풍의 온대성 저기압화에 대한 간단한 소개 및 최근 세 태풍의 사례분석: 산산(0613), 야기(0614), 솔릭(0618)을 중심으로

  • Choi, Ki-Seon (Policy Research Lab., National Institute of Meteorological Research) ;
  • Kim, Baek-Jo (Policy Research Lab., National Institute of Meteorological Research)
  • 최기선 (국립기상연구소 정책연구팀) ;
  • 김백조 (국립기상연구소 정책연구팀)
  • Published : 2007.12.31
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Abstract

In this article, the extratropical transition (ET) of tropical cyclone (TC) was investigated based on the case study covering the latest three TCs (Shanshaa Yaki, and Soulik) associated with ET evolution (onset and completion) using the objective 37 diagnostics of Evans and Hart (2003) and Hart (2003). At 500-hPa level, on an onset of ET, all three TCs entered the baroclinic zone. In a vertical cross-section analysis, three TCs before and at an onset of ET kept warm and humid throughout all levels around the TC center. However, these TCs after ET onset became relatively cold and dry over the western part of TC as the typical characteristics of ET concept model. Although our case study was not sufficient, it is concluded that the diagnostics of the ET onset and atmospheric structure change associated with Evans and Hart (2003) and Hart (2003) will be useful in ET operational forecast.

이 연구는 태풍의 온대성 저기압화에 대해 간단히 소개하고 Evans and Hart(2003)와 Hart(2003_의 객관적 온대성 저기압화 판별식을 이용하여 최근 온대성 저기압화를 거친 세 태풍(Shanshan, Yaki, Soulik)에 대한 사례분석이 이루어졌다. 500-hPa 고도장분석에서 온대성 저기압화 시작시 세 태풍 모두 중위도 경압지역으로 북상하는 공통된 특성을 보였다. 그러나 연직단면 분석에서는 온대성 저기압화의 시작전 시 태풍 중심부근의 모든 층에서 온난 다습한 특성을 보였다. 온대성 저기압화 이후에는 이 개념모델의 전형적 특성인 태풍의 서쪽영역에 한랭 건조한 특성을 나타내었다. 따라서 Evans and Hart(2003)와 Hart(2003)의 객관적 온대성저기압화의 판별식은 태풍의 온대성저기압화 시작 및 구조변화를 잘 반영하므로 기상청 예보현업에서도 유용하게 사용될 수 있을 것으로 판단된다.

Keywords

References

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