대기 (Atmosphere)

  • 제34권3호
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  • Pages.257-271
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  • 2024
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  • 1598-3560(pISSN)
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  • 2288-3266(eISSN)
한국기상학회 (Korean Meteorological Society)
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아시아 여름 몬순에서의 지역별 극한 강수의 역학과 특성

Dynamics and Characteristics of Regional Extreme Precipitation in the Asian Summer Monsoon

  • 전하은 (부산대학교 대기환경과학과) ;
  • 하경자 (부산대학교 대기환경과학과) ;
  • 김혜렴 (부산대학교 대기환경과학과) ;
  • 오효은 (IBS 기후물리연구단)
  • Ha-Eun Jeon (Department of Atmospheric Sciences, Pusan National University) ;
  • Kyung-Ja Ha (Department of Atmospheric Sciences, Pusan National University) ;
  • Hye-Ryeom Kim (Department of Atmospheric Sciences, Pusan National University) ;
  • Hyoeun Oh (Center for Climate Physics, Institute for Basic Science)
  • 투고 : 2024.05.17
  • 심사 : 2024.07.26
  • 발행 : 2024.08.31
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⟨ 이전 논문 다음 논문 ⟩

초록

In 2023, the World Meteorological Organization released a report on climate conditions in Asia, highlighting the region's high vulnerability to floods and the increasing severity and frequency of extreme precipitation events. While previous studies have largely concentrated on broader-scale phenomena such as the Asian monsoon, it is crucial to investigate the substantial characteristics of extreme precipitation for a better understanding. In this study, we analyze the spatiotemporal characteristics of extreme precipitation during summer and their affecting factors by decomposing the moisture budgets within specific Asian regions over 44 years (1979~2022). Our findings indicate that dynamic convergence terms (DY CON), which reflect changes in wind patterns, primarily drive extreme rainfall across much of Asia. In southern Asian sub-regions, particularly coastal areas, extreme precipitation is primarily driven by low-pressure systems, with DY CON accounting for 70% of the variance. However, in eastern Asia, both thermodynamic advection and nonlinear convergence terms significantly contribute to extreme precipitation. Notably, on the Korean Peninsula, thermodynamic advection plays an important role, driven by substantial moisture carried by strong southerly mean flow. Understanding these distinct characteristics of extreme rainfall across sub-regions is expected to enhance both predictability and resilience.

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과제정보

본 논문의 개선을 위해 좋은 의견을 제시해 주신 두 분의 심사위원께 감사의 말씀 드립니다. 본 연구는 부산대학교 기본연구지원사업(2년)에 의하여 연구가 수행되었습니다.

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