季節変化する外力に応答する海洋のダブルジャイヤのカオス的挙動について(大気・海洋・惑星の流れ(1),一般講演)

概要

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We investigated behavior of oceanic double-gyre in response to constant and seasonal changing external forcing by using a 1.5 layer, reduced-gravity, quasi-geostrophic numerical model. Reynolds number and amplitude of external forcing were used as control parameters in the numerical simulations. It is found that chaotic behavior appeared with a non-linear interaction between the internal variability of double-gyre itself and the variability of external forcing by analysis for trajectories of kinetic energy and available potential energy, flow-patterns of double-gyre and time series of total energy. It is considered that periodic phenomena developed into chaotic phenomena with increasing the amplitude of external forcing.
日本流体力学会の論文
2007-08-06