The mechanism of the radiation of the planetary waves by western boundary currents and the driving of the mean flow over a bottom slope.

西边界流的行星波辐射机制和底部斜坡上平均流的驱动。

• 批准号: 21540445
• 负责人: MIZUTA Genta
• 金额: $ 2.66万
• 依托单位: Hokkaido University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2009
• 资助国家: 日本
• 起止时间: 2009 至 2012
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-21540445/
• 关键词: 地球流体力学; ジェット; ロスビー波; 海底地形; 波による平均流形成; 海洋物理・陸水学

The dynamics of the interaction between the planetary waves, which are radiated from an ocean jet such as the Kuroshio Extension, the large-scale mean flow, and bottom topography is examined. It is shown that the planetary waves broadens the jet and matches it with weak flows in the ocean interior. The planetary waves also induce the equatorward potential-vorticity flux in the abyss, driving deep recirculations. After impinging over a bottom slope of seamounts, trenches, etc, the planetary waves induce the mean flow that is trapped near both the bottom and surface.

研究了黑潮伸展等海洋喷流辐射的行星波、大尺度平均流和海底地形之间相互作用的动力学。结果表明，行星波扩大了喷流，并使其与海洋内部的弱流相匹配。行星波也在深海中诱发赤道方向的位涡通量，推动深海再循环。在撞击海底山、海沟等的底部斜坡后，行星波诱发了被困在底部和表面附近的平均流。