nerc.ac.uk

Is the coefficient of eddy potential vorticity diffusion positive? Part1: barotropic zonal channel.

Ivchenko, V.O.; Zalesny, V.B.; Sinha, B.. 2018 Is the coefficient of eddy potential vorticity diffusion positive? Part1: barotropic zonal channel. Journal of Physical Oceanography, 48. 1589-1607. https://doi.org/10.1175/JPO-D-17-0229.1

Before downloading, please read NORA policies.
[img]
Preview
Text
text_ACCEPTED_JPO_8_May_and_change_citation_after_eq_6.pdf

Download (7MB) | Preview
[img]
Preview
Text
jpo-d-17-0229.1.pdf

Download (3MB) | Preview

Abstract/Summary

The question of whether the coefficient of diffusivity of potential vorticity by mesoscale eddies is positive is studied for a zonally reentrant barotropic channel using the quasi-geostrophic approach. The topography is limited to the first mode in the meridional direction but is unlimited in the zonal direction. We derive an analytic solution for the stationary (time-independent) solution. New terms associated with parameterized eddy fluxes of po-tential vorticity appear both in the equations for the mean zonal momentum balance, and the kinetic energy balance. These terms are linked with the topographic form stress exerted by parameterized eddies. It is demonstrated that in regimes with zonal flow (analogous to the Antarctic Circumpolar Current), the coefficient of eddy potential vorticity diffusivity must be positive.

Item Type: Publication - Article
Digital Object Identifier (DOI): https://doi.org/10.1175/JPO-D-17-0229.1
ISSN: 0022-3670
Date made live: 03 Jul 2018 09:43 +0 (UTC)
URI: http://nora.nerc.ac.uk/id/eprint/520435

Actions (login required)

View Item View Item

Document Downloads

Downloads for past 30 days

Downloads per month over past year

More statistics for this item...