A341 赤道β平面浅水系の線形シアー流中で発生する不安定モードの物理的解釈(A-34 大気の流れ(4),一般講演)

概要

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Unstable modes of a linear shear flow in shallow water on an equatorial β-plane are obtained over a wide range of a non-dimensional parameter corresponding to Lamb parameter, and are interpreted physically by the use of the concept of resonance between neutral waves. The results indicate that there exist two resonating types for most unstable modes: (i) the resonance of equatorial Kelvin modes and continuous modes, (ii) the resonance of equatorial Kelvin modes and westward mixed Rossby-gravity modes. Examinations of dispersion curves suggests that unstable modes of type (ii) mode with zonally asymmetric structure is the same kind of instability as so-called zonally symmetric inertial unstable modes.
日本流体力学会の論文
2004-08-09