인문학
사회과학
자연과학
공학
의약학
농수해양학
예술체육학
복합학
지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록· 키워드
This study examines a stationary frontal heavy rainfall event that occurred over the Yeongdong region of eastern Korea on 20 September 2024, where complex terrain strongly influenced rainfall distribution. Hourly intensive upper-air observations using a Multi-Sonde system were conducted from 1400 to 2100 LST at the Gungchon AWS site and compared with high-resolution Weather Research and Forecasting (WRF v4.6.1) model simulations. Time-height analyses of wind and thermodynamic-moisture structures were performed, and environmental conditions for rear-inflow jet (RIJ) development were diagnosed using Convective Available Potential Energy (CAPE), Precipitable Water (PW), and 0~2.5 km bulk wind shear. Observations showed a strong low-level jet (LLJ; up to 24.6 m s<sup>-1</sup>) at 1~3 km altitude prior to rainfall and a low-wind-speed layer below 0.5 km due to orographic blocking. After 1900 LST, a pronounced upward shift of the LLJ was followed by the penetration of a strong RIJ into the lower troposphere, reaching a maximum wind speed of 29.4 m s<sup>-1</sup>. In contrast, the WRF simulation underestimated RIJ intensity and lower-level moisture. Prior to RIJ onset, observed CAPE remained very large (2,500~4,000 J kg<sup>-1</sup>) with high lower-level PW (29.8~31.0 mm), whereas the model underestimated PW by approximately 8~10 mm, resulting in substantially weaker CAPE. These results highlight the importance of accurately representing lower- level moisture and demonstrate the value of hourly Multi-Sonde observations for diagnosing heavy rainfall over complex terrain and improving short-term forecasting guidance
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목차
- Abstract
- 1. 서론
- 2. 자료 및 분석방법
- 3. 강수 특성 및 종관·중규모 환경 분석
- 4. 멀티존데 관측과 WRF 수치모의를 이용한 강수 시스템 분석
- 5. 요약 및 결론
- REFERENCES