...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Physical Oceanography >Multiple Oscillatory Modes of the Argentine Basin. Part I: Statistical Analysis
【24h】

Multiple Oscillatory Modes of the Argentine Basin. Part I: Statistical Analysis

机译：阿根廷盆地的多种振荡模式。第一部分：统计分析

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

Observations of the sea surface height in the Argentine Basin indicate that strong variability occurs on a time scale of 20-30 days. The aim of this study is to determine the physical processes responsible for this variability. First, results are presented from two statistical techniques applied to a decade of altimetric data. A complex empirical orthogonal function (CEOF) analysis identifies the recently discovered dipole mode as the dominant mode of variability. A principal oscillation pattern (POP) analysis confirms the existence of this mode, which has a period of 25 days. The second CEOF displays a propagating pattern in the northern Argentine Basin, plus a rotating dipole in the southwest corner. The POP analysis identifies both patterns as individual modes, with periods of 30 and 20 days, respectively. Second, the barotropic normal modes of the Argentine Basin are studied, using a shallow-water model capturing the full bathymetry of the basin. Coherences between the spatial patterns of these modes and altimeter data suggest that several of the basin modes are involved in the observed variability. This analysis implies that the 20-day mode detected by recent bottom-pressure measurements is a true barotropic mode. However, the 25-day variability, as found in altimeter data, cannot be directly attributed to the excitation of a free Rossby basin mode. This study indicates that the results of several apparently conflicting observations of the flow variability in the Argentine Basin can be reconciled by assuming that multiple basin modes are involved.
机译：对阿根廷盆地海面高度的观察表明，强烈的变化发生在20-30天的时间范围内。这项研究的目的是确定造成这种变异的物理过程。首先，介绍了应用于十年高度数据的两种统计技术的结果。复杂的经验正交函数（CEOF）分析将最近发现的偶极子模式识别为变异性的主导模式。主振荡模式（POP）分析确认了此模式的存在，该模式的周期为25天。第二个CEOF在阿根廷北部盆地表现出传播模式，在西南角处有一个旋转偶极子。 POP分析将这两种模式识别为单独的模式，分别为30天和20天。其次，使用捕获盆地全部水深的浅水模型研究了阿根廷盆地的正压模式。这些模式的空间模式与高度计数据之间的一致性表明，观测到的变异性涉及几种盆地模式。该分析表明，最近的底部压力测量检测到的20天模式是真正的正压模式。但是，在高度计数据中发现的25天变异性不能直接归因于自由Rossby流域模式的激发。这项研究表明，通过假设涉及多个盆地模式，可以调和阿根廷盆地流量变化的几个明显矛盾的观察结果。

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