每年專案
摘要
Tropical cyclones (TCs) are complex sources of atmospheric gravity waves (GWs). In this study, theWeather Research and Forecasting Model was used to model TC Soudelor (2015) and the induced elliptical structures of GWs in the upper troposphere (UT) and lower stratosphere (LS) prior to its landfall over Taiwan. Conventional, spectral and wavelet analyses exhibit dominant GWs with horizontal and vertical wavelengths, and periods of 16-700 km, 1.5-5 km, and 1-20 h, respectively. The wave number one (WN1) wind asymmetry generated mesoscale inertia GWs with dominant horizontal wavelengths of 100-300 km, vertical wavelengths of 1.5-2.5 km (3.5 km) and westward (eastward) propagation at the rear of the TC in the UT (LS). It was also revealed to be an active source of GWs. The two warm anomalies of the TC core induced two quasi-diurnal GWs and an intermediate GW mode with a 10-h period. The time evolution of dominant periods could be indicative of changes in TC dynamics. The FormoSat-3/COSMIC (Formosa Satellite Mission-3/Constellation Observing System for Meteorology, Ionosphere, and Climate) dataset confirmed the presence of GWs with dominant vertical wavelengths of about 3.5 km in the UT and LS.
原文 | ???core.languages.en_GB??? |
---|---|
文章編號 | 260 |
期刊 | Atmosphere |
卷 | 10 |
發行號 | 5 |
DOIs | |
出版狀態 | 已出版 - 1 5月 2019 |
指紋
深入研究「Elliptical structures of gravity waves produced by typhoon soudelor in 2015 near Taiwan」主題。共同形成了獨特的指紋。專案
- 2 已完成