A simple model for the symmetry properties of nonlinear wind driven ocean circulation
作者:
J.T. F. Zimmerman,
期刊:
Geophysical & Astrophysical Fluid Dynamics
(Taylor Available online 1993)
卷期:
Volume 71,
issue 1-4
页码: 1-15
ISSN:0309-1929
年代: 1993
DOI:10.1080/03091929308203595
出版商: Taylor & Francis Group
关键词: Ocean circulation;winddriven;nonlinear;beta-plane
数据来源: Taylor
摘要:
It is shown that the symmetry properties of barotropic nonlinear wind driven ocean circulation, as presented in the numerical simulations of Veronis (1966a, b), can easily be derived analytically for large Ekman number, the so-called “small beta regime”, and for any strength of the nonlinearity, by a perturbation expansion in the inverse Ekman number. The solution is a superposition of a vorticity monopole, dipole and quadrupole, the symmetry properties of which are qualitatively the same as those of the Veronis' sequence. It is also shown that the Veronis' sequence does not lead to the inertial Fofonoff (1954) mode, but that the latter is the limit of another sequence in the parameter plane spanned by the Rossby and Ekman numbers.
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