Detecting barriers to transport: a review of different techniques

被引：150

作者：

Boffetta, G

Lacorata, G

Radaelli, G

Vulpiani, A

机构：

[1] Univ Turin, Dipartimento Fis Gen, I-10125 Turin, Italy

[2] Univ Turin, INFM, I-10125 Turin, Italy

[3] CNR, Ist Cosmogeofis, I-10133 Turin, Italy

[4] Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy

[5] Univ Aquila, Dipartimento Fis, I-67010 Coppito, Laquila, Italy

[6] INFM, Unita Roma 1, I-00185 Rome, Italy

来源：

PHYSICA D-NONLINEAR PHENOMENA | 2001年 / 159卷 / 1-2期

关键词：

Lagrangian transport; FTLE and FSLE;

D O I：

10.1016/S0167-2789(01)00330-X

中图分类号：

O29 [应用数学];

学科分类号：

070104 ;

摘要：

We review and discuss some different techniques for describing local dispersion properties in fluids. A recent Lagrangian diagnostics based on the finite scale Lyapunov exponent (FSLE), is presented and compared to the finite time Lyapunov exponent (FTLE), to the Okubo-Weiss (OW) and Hua-Klein (HK) criteria. We show that the OW and HK are the limiting case of the FTLE, and that the FSLE is the most efficient method for detecting the presence of cross-stream barriers. We illustrate our findings by considering two examples of geophysical interest: a kinematic model of a meandering jet, and Lagrangian tracers advected by stratospheric circulation. (C) 2001 Elsevier Science B.V All rights reserved.

引用

页码：58 / 70

页数：13

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