Intergyre transport in a wind-driven, quasigeostrophic double gyre: An application of lobe dynamics
Intergyre transport in a wind-driven, quasigeostrophic double gyre: An application of lobe dynamics
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DOI：
10.5194/npg-8-69-2001
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发表时间：
2000-06
影响因子：
2.2
通讯作者：
Chad Coulliette;Stephen Wiggins
中科院分区：
文献类型：
--
作者：
Chad Coulliette;Stephen Wiggins
抽象的。我们研究了从三层涡旋解析准地转海洋环流模型获得的流动，该模型受到施加的风应力旋度的影响。对于此模型，我们将考虑由向东的喷气机分隔的北部和南部环流之间的运输。我们将重点关注动力系统理论技术的使用，特别是波瓣动力学，以形成控制运输的几何结构。通过“管理”，我们的意思是它们可以用于计算拉格朗日传输量，例如穿过射流的通量。我们将考虑周期性、准周期性和混沌速度场，从而评估动力系统技术在时空复杂性逐渐增加的流动中的有效性。还讨论了实现动力系统技术所需的数值方法以及波瓣动力学作为特定“事件”特征的重要性，例如从蜿蜒射流中夹断的环。
Abstract. We study the flow obtained from a three-layer, eddy-resolving quasigeostrophic ocean circulation model subject to an applied wind stress curl. For this model we will consider transport between the northern and southern gyres separated by an eastward jet. We will focus on the use of techniques from dynamical systems theory, particularly lobe dynamics, in the forming of geometric structures that govern transport. By "govern", we mean they can be used to compute Lagrangian transport quantities, such as the flux across the jet. We will consider periodic, quasiperiodic, and chaotic velocity fields, and thus assess the effectiveness of dynamical systems techniques in flows with progressively more spatio-temporal complexity. The numerical methods necessary to implement the dynamical systems techniques and the significance of lobe dynamics as a signature of specific "events", such as rings pinching off from a meandering jet, are also discussed.