...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Physical Oceanography >Topographic Control of Basin and Channel Flows: The Role of Bottom Pressure Torques and Friction
【24h】

Topographic Control of Basin and Channel Flows: The Role of Bottom Pressure Torques and Friction

机译：盆地和河道水流的地形控制：底部压力转矩和摩擦的作用

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The topographical control of western boundary currents within a basin and zonal jets in a channel is investigated in terms of the potential vorticity (PV) and barotropic vorticity (BV: the curl of the depth-integrated velocity) budgets using isopycnic, adiabatic wind-driven experiments. Along the western boundary, the wind-driven transport is returned across latitude lines by the bottom pressure torque, while friction is only important in altering the PV within an isopycnic layer and in allowing a closed circulation. These contrasting balances constrain the geometry of the flow through integral relationships for the BV and PV. For both homogenous and stratified basins with sloping sidewalls, the northward subtropical jet separates from the western wall and has opposing frictional torques on either side of the jet, which cancel in a zonal integral for BV but alter the PV within a layer streamline. In a channel with partial topographic barriers, the bottom pressure torque is again important in returning wind-driven flows along western boundaries and in transferring BV from neighboring wind-driven gyres into a zonal jet. The depth-integrated flow steered by topography controls where the bottom friction alters the PV, which can lead to different PV states being attained for separate subbasins along a channel.
机译：使用等温，绝热风驱动，根据潜在涡度（PV）和正压涡度（BV：深度积分速度的曲率）预算研究了盆地内西部边界流和通道中纬向射流的地形控制。实验。沿西部边界，风动力传输通过底部压力扭矩返回纬线，而摩擦仅在改变等渗层内的PV并允许封闭循环中很重要。这些相反的平衡通过BV和PV的积分关系来约束流的几何形状。对于具有倾斜侧壁的均质盆地和分层盆地而言，北亚热带喷流都与西壁分开，并且在喷流的任一侧都具有相反的摩擦转矩，这抵消了BV的区域积分，但改变了层流线内的PV。在具有局部地形屏障的通道中，底部压力转矩对于沿西部边界返回风流以及将BV从相邻的风回旋管转移到纬向射流中也很重要。地形控制的深度积分流控制底部摩擦力改变PV，这会导致沿通道的各个子盆地获得不同的PV状态。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号