AM05-13-003 黒潮流量の季節変動のメカニズム(大気・海洋の流れ1,一般講演)

概要

論文の詳細を見る
Observations indicate that the climatological volume transports of the Kuroshio have an annual range of at most 10Sv and a maximum in summer, both of which disagree with the nontopographic Sverdrup relation. We show that these properties may be reproduced using a two-layer planetary geostrophic model with variable bottom topography if we include sea surface heat flux, as well as large interface displacements associated with layer outcropping. From numerical experiments we find that the bottom topography accelerates conversion between available potential energy and barotropic kinetic energy so as to compensate for the change in the energy storage due to the wind stress and the heat transfer. In particular, winter cooling intensifies conversion from barotropic kinetic energy to available potential energy, leading to a further decrease in the winter transport, and the reverse takes place in summer, so that the summer transport may exceeds the winter transport.
日本流体力学会の論文
2005-09-05