...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Physical Oceanography >Basin-Scale Topographic Waves in the Gulf of Riga
【24h】

Basin-Scale Topographic Waves in the Gulf of Riga

机译：里加湾的盆地规模地形波

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

A two-dimensional circulation model has been used to test the hypothesis of whether the observed low-frequency current variations in the central Gulf of Riga, Baltic Sea, can be explained by basin-scale topographic wave response. A comparison of two-dimensional model results with measurements from a single current meter in the gulf showed good correlation. More sophisticated three-dimensional barotropic and baroclinic models provided only marginal improvement over the two-dimensional model. The model results indicate that wind-driven flow over variable bottom topography is the dominant process during moderate and strong winds. The double-gyre circulation pattern resembles the gravest basin-scale topographic wave. The free topographic wave propagates cyclonically around the basin, but does not complete a full cycle because of the shallowness of the Gulf of Riga. The evolution of the topographic wave under realistic wind conditions is analyzed using vorticity dynamics in a basin-scale sense. The topographic wave is reinforced by cyclonically rotating wind and can be destroyed most effectively by anticyclonically rotating wind. The topographic wave signature is more apparent in deep water and almost absent in shallow areas of the basin. During calm periods or under the influence of weak winds, the double-gyre circulation will evolve into predominantly cyclonic circulation.
机译：二维环流模型已用于检验以下假设的假设：在波罗的海的里加中央海湾观察到的低频电流变化是否可以用盆地尺度的地形波响应来解释。二维模型结果与海湾中单个电流表的测量结果的比较显示出良好的相关性。较复杂的三维正压和斜压模型仅提供了比二维模型小的改进。模型结果表明，在中等和强风期间，可变底部地形上的风驱动流是主要过程。双旋流环流模式类似于最严重的盆地尺度地形波。自由的地形波在盆地周围旋流传播，但由于里加湾的浅浅，并未完成整个周期。使用流域尺度意义上的涡旋动力学分析了现实风条件下地形波的演变。地形波通过旋风旋转增强，并且可以通过旋风旋转最有效地破坏。地形波特征在深水中更为明显，而在盆地浅层区域则几乎不存在。在平静时期或在弱风的影响下，双涡旋环流将演变为旋风环流。

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