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On the generation mechanisms of short-scale unbalanced modes in rotating two-layer flows with vertical shear

Abstract:

We report on the results of a laboratory investigation using a rotating two-layer annulus experiment, which exhibits both large-scale vortical modes and short-scale divergent modes. A sophisticated visualization method allows us to observe the flow at very high spatial and temporal resolution. The balanced long-wavelength modes appear only when the Froude number is supercritical (i.e. F > F critical ≡ π²/2), and are therefore consistent with generation by a baroclinic instability. The unba...

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Publication status:
Published
Peer review status:
Peer reviewed
Version:
Publisher's version

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Publisher copy:
10.1017/S0022112004002873

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Institution:
University of Oxford
Department:
Mathematical,Physical & Life Sciences Division - Physics - Atmospheric,Oceanic and Planetary Physics
Role:
Author
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Institution:
John Hopkins University, Baltimore, USA
Department:
Department of Earth and Planetary Sciences
Role:
Author
More by this author
Institution:
University of Oxford
Research group:
Geophysical and planetary fluid dynamics
Oxford college:
Trinity College
Department:
Mathematical,Physical & Life Sciences Division - Physics - Atmospheric,Oceanic and Planetary Physics
Role:
Author
Publisher:
Cambridge University Press Publisher's website
Journal:
Journal of Fluid Mechanics Journal website
Volume:
528
Pages:
1-22
Publication date:
2005-04-03
DOI:
EISSN:
1469-7645
ISSN:
0022-1120
URN:
uuid:889786b9-5457-412d-b1f7-30cd42e5b04a
Local pid:
ora:1642

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