인문학
사회과학
자연과학
공학
의약학
농수해양학
예술체육학
복합학
개인구독
소속 기관이 없으신 경우, 개인 정기구독을 하시면 저렴하게
논문을 무제한 열람 이용할 수 있어요.
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
The generation mechanisms of two turbulence events that occurred near the Korean Peninsula and led to aircraft accidents were investigated using high-resolution numerical simulations with the Weather Research and Forecasting (WRF) model. The first case occurred on 12 January 2020 at 0417 UTC: an aircraft that departed from Kitakyushu Airport, Japan, en-route to Incheon Airport, encountered moderate intensity turbulence in clear sky at an altitude of 25,000 ft (approximately 375 hPa) over Fukuoka. Turbulence was observed beneath the core of a jet stream, where wind speeds exceeded 90 m s<sup>-1</sup> over South Korea and strong horizontal wind shear and deformation appeared at the location of turbulence encounter. A developed upper-level frontal system induced strong vertical wind shear and tropopause folding down to approximately 480 hPa. Despite the relatively stable stratification, the strong vertical wind shear caused the Richardson number to decrease, leading to the generation of turbulence through the Kelvin-Helmholtz instability. The second case was 27 May 2021 at 2253 UTC: an aircraft that departed from Gimpo Airport en-route to Jeju Airport encountered severe intensity turbulence at an altitude of 17,000 ft (approximately 515 hPa) over Yesan, South Korea. A localized front developed north of the turbulence encountered location and propagated southeastward, during which it generated gravity waves with a horizontal wavelength of about 10 km. The localized front induced strong vertical wind shear by the thermal wind relationship, and the propagation of the gravity waves enhanced the Kelvin-Helmholtz instability, resulting in turbulence.
#Aviation turbulence
#Numerical simulation
#Upper-level frontal system
#Frontogenesis
#Kelvin-Helmholtz instability
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목차
- Abstract
- 1. 서론
- 2. 자료 및 연구 방법
- 3. 난류 조우 사례 및 사용한 자료
- 4. 연구 결과
- 5. 요약 및 결론
- REFERENCES