Linear stability and stable modes of geostrophic fronts
作者:
Nathan Paldor,
期刊:
Geophysical & Astrophysical Fluid Dynamics
(Taylor Available online 1983)
卷期:
Volume 24,
issue 4
页码: 299-326
ISSN:0309-1929
年代: 1983
DOI:10.1080/03091928308209070
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
A Rayleigh integral is used to prove that an unbounded geostrophic front of uniform potential vorticity is stable with respect to small perturbations of arbitrary wavelength. The ageostrophic theory developed in this study yields a stable, near-inertial, long trapped mode. Recent oceanic observations of the increase in the energy of the inertial peak in the vicinity of fronts support the existence of this inertial trapped mode. In addition the theory yields a geostrophic mode which is expected to become unstable when the potential vorticity is not uniform.
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