An equilibrium statistical theory for large-scale features of open-ocean convection

M. T. DiBattista, A. J. Majda

Research output: Contribution to journalArticle

Abstract

A 'most probable state' equilibrium statistical theory for random distributions of hetons in a closed basin is developed here in the context of two-layer quasigeostrophic models for the spreading phase of open-ocean convection. The theory depends only on bulk conserved quantities such as energy, circulation, and the range of values of potential vorticity in each layer. For a small Rossby deformation radius typical for open-ocean convection sites, the most probable states that arise from this theory strongly resemble the saturated baroclinic states of the spreading phase of convection, with a rim current and localized temperature anomaly. Furthermore, rigorous explicit nonlinear stability analysis guarantees the stability of these steady states for a suitable range of parameters. Both random heton distributions in a basin with quiescent flow as well as heton addition to an ambient barotropic flow in the basin are studied here. Also, systematic results are presented on the influence of the Rossby deformation radius compared to the basin scale on the structure of the predictions of the statistical theory.

Original languageEnglish (US)
Pages (from-to)1325-1353
Number of pages29
JournalJournal of Physical Oceanography
Volume30
Issue number6
StatePublished - 2000

Fingerprint

open ocean
convection
basin
barotropic motion
potential vorticity
stability analysis
temperature anomaly
prediction
energy
distribution

ASJC Scopus subject areas

  • Oceanography

Cite this

An equilibrium statistical theory for large-scale features of open-ocean convection. / DiBattista, M. T.; Majda, A. J.

In: Journal of Physical Oceanography, Vol. 30, No. 6, 2000, p. 1325-1353.

Research output: Contribution to journalArticle

DiBattista, M. T. ; Majda, A. J. / An equilibrium statistical theory for large-scale features of open-ocean convection. In: Journal of Physical Oceanography. 2000 ; Vol. 30, No. 6. pp. 1325-1353.
@article{0c658ee6b0fe4032b3d74a575f882dc7,
title = "An equilibrium statistical theory for large-scale features of open-ocean convection",
abstract = "A 'most probable state' equilibrium statistical theory for random distributions of hetons in a closed basin is developed here in the context of two-layer quasigeostrophic models for the spreading phase of open-ocean convection. The theory depends only on bulk conserved quantities such as energy, circulation, and the range of values of potential vorticity in each layer. For a small Rossby deformation radius typical for open-ocean convection sites, the most probable states that arise from this theory strongly resemble the saturated baroclinic states of the spreading phase of convection, with a rim current and localized temperature anomaly. Furthermore, rigorous explicit nonlinear stability analysis guarantees the stability of these steady states for a suitable range of parameters. Both random heton distributions in a basin with quiescent flow as well as heton addition to an ambient barotropic flow in the basin are studied here. Also, systematic results are presented on the influence of the Rossby deformation radius compared to the basin scale on the structure of the predictions of the statistical theory.",
author = "DiBattista, {M. T.} and Majda, {A. J.}",
year = "2000",
language = "English (US)",
volume = "30",
pages = "1325--1353",
journal = "Journal of Physical Oceanography",
issn = "0022-3670",
publisher = "American Meteorological Society",
number = "6",

}

TY - JOUR

T1 - An equilibrium statistical theory for large-scale features of open-ocean convection

AU - DiBattista, M. T.

AU - Majda, A. J.

PY - 2000

Y1 - 2000

N2 - A 'most probable state' equilibrium statistical theory for random distributions of hetons in a closed basin is developed here in the context of two-layer quasigeostrophic models for the spreading phase of open-ocean convection. The theory depends only on bulk conserved quantities such as energy, circulation, and the range of values of potential vorticity in each layer. For a small Rossby deformation radius typical for open-ocean convection sites, the most probable states that arise from this theory strongly resemble the saturated baroclinic states of the spreading phase of convection, with a rim current and localized temperature anomaly. Furthermore, rigorous explicit nonlinear stability analysis guarantees the stability of these steady states for a suitable range of parameters. Both random heton distributions in a basin with quiescent flow as well as heton addition to an ambient barotropic flow in the basin are studied here. Also, systematic results are presented on the influence of the Rossby deformation radius compared to the basin scale on the structure of the predictions of the statistical theory.

AB - A 'most probable state' equilibrium statistical theory for random distributions of hetons in a closed basin is developed here in the context of two-layer quasigeostrophic models for the spreading phase of open-ocean convection. The theory depends only on bulk conserved quantities such as energy, circulation, and the range of values of potential vorticity in each layer. For a small Rossby deformation radius typical for open-ocean convection sites, the most probable states that arise from this theory strongly resemble the saturated baroclinic states of the spreading phase of convection, with a rim current and localized temperature anomaly. Furthermore, rigorous explicit nonlinear stability analysis guarantees the stability of these steady states for a suitable range of parameters. Both random heton distributions in a basin with quiescent flow as well as heton addition to an ambient barotropic flow in the basin are studied here. Also, systematic results are presented on the influence of the Rossby deformation radius compared to the basin scale on the structure of the predictions of the statistical theory.

UR - http://www.scopus.com/inward/record.url?scp=0033862477&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0033862477&partnerID=8YFLogxK

M3 - Article

VL - 30

SP - 1325

EP - 1353

JO - Journal of Physical Oceanography

JF - Journal of Physical Oceanography

SN - 0022-3670

IS - 6

ER -