How topography brakes the Antarctic Circumpolar Current

地形如何抑制南极绕极流

• 批准号: DP170102162
• 负责人: Prof Nathaniel Bindoff
• 金额: $ 54.8万
• 依托单位: University of Tasmania
• 依托单位国家: 澳大利亚
• 项目类别: Discovery Projects
• 财政年份: 2017
• 资助国家: 澳大利亚
• 起止时间: 2017-07-01 至 2022-12-31
• 项目状态: 已结题
• 来源: https://dataportal.arc.gov.au/RGS/Web/Grants/DP170102162
• 关键词: How; topography; brakes; Antarctic; Circumpolar

This project aims to observe and simulate the mechanisms that slow the Antarctic Circumpolar Current. The Southern Ocean winds have increased over the last two decades while the transport of the world’s largest current remains steady or slightly decreasing. A possible explanation is negative feedback mechanisms between the winds and transport of the Antarctic Circumpolar Current. This project will observe how eddies carry momentum from the wind down to the sea floor and accelerate the deep currents that drag against the rough bottom to put the brakes on this current. Since this current affects Australian rainfall patterns and agricultural output, findings could inform public policy.

该项目旨在观察和模拟减缓南极绕极流的机制。过去二十年来，南大洋的风力有所增强，而世界上最大洋流的输送量却保持稳定或略有减少。一种可能的解释是风和南极绕极流输送之间的负反馈机制。该项目将观察涡流如何将风中的动量带到海底，并加速拖曳粗糙底部的深水流，从而对该水流施加制动。由于该洋流影响澳大利亚的降雨模式和农业产量，因此研究结果可以为公共政策提供信息。