A Dynamical Mechanism for Secondary Eyewall Formation in Tropical Cyclones

This study proposes that secondary eyewall formation (SEF) of tropical cyclones (TCs) can be attributed to an instability of flow in the free atmosphere coupled with Ekman pumping. Unstable solutions of a 1.5-layer shallow-water system are obtained under fast–wind speed conditions in the free atmosp...

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Veröffentlicht in:	Journal of the atmospheric sciences 2018-11, Vol.75 (11), p.3965-3986
Hauptverfasser:	Miyamoto, Yoshiaki, Nolan, David S., Sugimoto, Norihiko
Format:	Artikel
Sprache:	eng
Schlagworte:	Angular velocity Atmosphere Atmospheric models Coriolis force Coriolis parameters Cyclones Eigenvalues Ekman pumping Flow stability Free atmosphere Growth rate Hurricanes Mathematical models Numerical models Parameters Physics Rossby number Shallow water Tropical climate Tropical cyclone formation Tropical cyclones Velocity Vertical vorticity Vorticity Wind Wind speed
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