Noise-sustained currents in quasigeostrophic turbulence over topography

15 pages, 4 figures.-- PACS nrs.: 05.40.+j; 92.90.+x; 47.27.Eq.-- ArXiv pre-print available at: http://arxiv.org/abs/chao-dyn/9701009

Detalles Bibliográficos
Autores: Álvarez-Díaz, Alberto, Hernández-García, Emilio, Tintoré, Joaquín
Tipo de recurso: artículo
Fecha de publicación:1997
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/14593
Acceso en línea:http://hdl.handle.net/10261/14593
Access Level:acceso abierto
Palabra clave:Chaotic Dynamics
Statistical mechanics
Atmospheric and oceanic physics
Geophysics
[PACS] Turbulence simulation and modeling
[PACS] Noise
[PACS] Other topics in hydrospheric and atmospheric geophysics
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spelling Noise-sustained currents in quasigeostrophic turbulence over topographyÁlvarez-Díaz, AlbertoHernández-García, EmilioHernández-García, EmilioTintoré, JoaquínChaotic DynamicsStatistical mechanicsAtmospheric and oceanic physicsGeophysics[PACS] Turbulence simulation and modeling[PACS] Noise[PACS] Other topics in hydrospheric and atmospheric geophysics15 pages, 4 figures.-- PACS nrs.: 05.40.+j; 92.90.+x; 47.27.Eq.-- ArXiv pre-print available at: http://arxiv.org/abs/chao-dyn/9701009We study the development of directed mean currents in a nonlinear model of fluid flow appropriate for large-scale ocean dynamics in the presence of bottom topography and dissipation, and forced with a noise term. We show that the presence of noise leads to persistent average currents directed along isobaths. The effect requires the presence of both the nonlinear and the random terms, and can be though of as a rectification of the stochastic energy input by the combined effect of nonlinearity and topography. At variance with previous works we use a scale-unselective dissipation, so that the phenomenon can not be explained in terms of minimum enstrophy states. Despite the fact that the system is out of equilibrium the large-scales are well described by a generalized canonical equilibrium with mean energy and enstrophy determined by a balance between random forcing and dissipation. This result allows predicting the strenght of the noise-sustained currents. Finally we discuss the relevance that these noise-induced currents could have on real ocean circulation.Financial support from CICYT (AMB95-0901-C02-01-CP and MAR95-1861), DGICYT (PB94-1167 and PB94-1172), and from the MAST program MATTER MAS3-CT96 -0051 (EC) is greatly acknowledged.Peer reviewedElsevier200920091997info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501333553 bytesapplication/pdfhttp://hdl.handle.net/10261/14593reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://dx.doi.org/10.1016/S0378-4371(97)00377-4info:eu-repo/semantics/openAccessoai:digital.csic.es:10261/145932026-05-22T06:33:51Z
dc.title.none.fl_str_mv Noise-sustained currents in quasigeostrophic turbulence over topography
title Noise-sustained currents in quasigeostrophic turbulence over topography
spellingShingle Noise-sustained currents in quasigeostrophic turbulence over topography
Álvarez-Díaz, Alberto
Chaotic Dynamics
Statistical mechanics
Atmospheric and oceanic physics
Geophysics
[PACS] Turbulence simulation and modeling
[PACS] Noise
[PACS] Other topics in hydrospheric and atmospheric geophysics
title_short Noise-sustained currents in quasigeostrophic turbulence over topography
title_full Noise-sustained currents in quasigeostrophic turbulence over topography
title_fullStr Noise-sustained currents in quasigeostrophic turbulence over topography
title_full_unstemmed Noise-sustained currents in quasigeostrophic turbulence over topography
title_sort Noise-sustained currents in quasigeostrophic turbulence over topography
dc.creator.none.fl_str_mv Álvarez-Díaz, Alberto
Hernández-García, Emilio
Hernández-García, Emilio
Tintoré, Joaquín
author Álvarez-Díaz, Alberto
author_facet Álvarez-Díaz, Alberto
Hernández-García, Emilio
Tintoré, Joaquín
author_role author
author2 Hernández-García, Emilio
Tintoré, Joaquín
author2_role author
author
dc.subject.none.fl_str_mv Chaotic Dynamics
Statistical mechanics
Atmospheric and oceanic physics
Geophysics
[PACS] Turbulence simulation and modeling
[PACS] Noise
[PACS] Other topics in hydrospheric and atmospheric geophysics
topic Chaotic Dynamics
Statistical mechanics
Atmospheric and oceanic physics
Geophysics
[PACS] Turbulence simulation and modeling
[PACS] Noise
[PACS] Other topics in hydrospheric and atmospheric geophysics
description 15 pages, 4 figures.-- PACS nrs.: 05.40.+j; 92.90.+x; 47.27.Eq.-- ArXiv pre-print available at: http://arxiv.org/abs/chao-dyn/9701009
publishDate 1997
dc.date.none.fl_str_mv 1997
2009
2009
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/14593
url http://hdl.handle.net/10261/14593
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv http://dx.doi.org/10.1016/S0378-4371(97)00377-4
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 333553 bytes
application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,811543

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