The role of the divergent circulation for large-scale eddy momentum transport in the tropics. Part I: observations

This work investigates the role played by the divergent circulation for meridional eddy momentum transport in the tropical atmosphere. It is shown that the eddy momentum flux in the deep tropics arises primarily from correlations between the divergent eddy meridional velocity and the rotational eddy...

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Detalles Bibliográficos
Autor: Zurita Gotor, Pablo
Tipo de recurso: artículo
Fecha de publicación:2019
País:España
Institución:Universidad Complutense de Madrid (UCM)
Repositorio:Docta Complutense
Idioma:inglés
OAI Identifier:oai:docta.ucm.es:20.500.14352/13385
Acceso en línea:https://hdl.handle.net/20.500.14352/13385
Access Level:acceso abierto
Palabra clave:52
Shallow-water model
Rossby-wave propagation
Equatorial superrotation
Planetary-waves
Zonal winds
Hadley
Shear
Instability
Signature
Evolutiion
Física atmosférica
2501 Ciencias de la Atmósfera
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oai_identifier_str oai:docta.ucm.es:20.500.14352/13385
network_acronym_str ES
network_name_str España
repository_id_str
spelling The role of the divergent circulation for large-scale eddy momentum transport in the tropics. Part I: observationsZurita Gotor, Pablo52Shallow-water modelRossby-wave propagationEquatorial superrotationPlanetary-wavesZonal windsHadleyShearInstabilitySignatureEvolutiionFísica atmosférica2501 Ciencias de la AtmósferaThis work investigates the role played by the divergent circulation for meridional eddy momentum transport in the tropical atmosphere. It is shown that the eddy momentum flux in the deep tropics arises primarily from correlations between the divergent eddy meridional velocity and the rotational eddy zonal velocity. Consistent with previous studies, this transport is dominated by the stationary wave component, associated with correlations between the zonal structure of the Hadley cell (zonal anomalies in the meridional overturning) and the climatological-mean Rossby gyres. This eddy momentum flux decomposition implies a different mechanism of eddy momentum convergence from the extratropics, associated with upper-level mass convergence (divergence) over sectors with anomalous westerlies (easterlies). By itself, this meridional transport would only increase (decrease) isentropic thickness over regions with anomalous westerly (easterly) zonal flow. The actual momentum mixing is due to vertical (cross isentropic) advection, pointing to the key role of diabatic processes for eddy–mean flow interaction in the tropics..American Meteorological SocietyUniversidad Complutense de Madrid20192019-04-0120192019-04-01journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/13385reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/133852026-06-02T12:44:21Z
dc.title.none.fl_str_mv The role of the divergent circulation for large-scale eddy momentum transport in the tropics. Part I: observations
title The role of the divergent circulation for large-scale eddy momentum transport in the tropics. Part I: observations
spellingShingle The role of the divergent circulation for large-scale eddy momentum transport in the tropics. Part I: observations
Zurita Gotor, Pablo
52
Shallow-water model
Rossby-wave propagation
Equatorial superrotation
Planetary-waves
Zonal winds
Hadley
Shear
Instability
Signature
Evolutiion
Física atmosférica
2501 Ciencias de la Atmósfera
title_short The role of the divergent circulation for large-scale eddy momentum transport in the tropics. Part I: observations
title_full The role of the divergent circulation for large-scale eddy momentum transport in the tropics. Part I: observations
title_fullStr The role of the divergent circulation for large-scale eddy momentum transport in the tropics. Part I: observations
title_full_unstemmed The role of the divergent circulation for large-scale eddy momentum transport in the tropics. Part I: observations
title_sort The role of the divergent circulation for large-scale eddy momentum transport in the tropics. Part I: observations
dc.creator.none.fl_str_mv Zurita Gotor, Pablo
author Zurita Gotor, Pablo
author_facet Zurita Gotor, Pablo
author_role author
dc.contributor.none.fl_str_mv Universidad Complutense de Madrid
dc.subject.none.fl_str_mv 52
Shallow-water model
Rossby-wave propagation
Equatorial superrotation
Planetary-waves
Zonal winds
Hadley
Shear
Instability
Signature
Evolutiion
Física atmosférica
2501 Ciencias de la Atmósfera
topic 52
Shallow-water model
Rossby-wave propagation
Equatorial superrotation
Planetary-waves
Zonal winds
Hadley
Shear
Instability
Signature
Evolutiion
Física atmosférica
2501 Ciencias de la Atmósfera
description This work investigates the role played by the divergent circulation for meridional eddy momentum transport in the tropical atmosphere. It is shown that the eddy momentum flux in the deep tropics arises primarily from correlations between the divergent eddy meridional velocity and the rotational eddy zonal velocity. Consistent with previous studies, this transport is dominated by the stationary wave component, associated with correlations between the zonal structure of the Hadley cell (zonal anomalies in the meridional overturning) and the climatological-mean Rossby gyres. This eddy momentum flux decomposition implies a different mechanism of eddy momentum convergence from the extratropics, associated with upper-level mass convergence (divergence) over sectors with anomalous westerlies (easterlies). By itself, this meridional transport would only increase (decrease) isentropic thickness over regions with anomalous westerly (easterly) zonal flow. The actual momentum mixing is due to vertical (cross isentropic) advection, pointing to the key role of diabatic processes for eddy–mean flow interaction in the tropics..
publishDate 2019
dc.date.none.fl_str_mv 2019
2019-04-01
2019
2019-04-01
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/20.500.14352/13385
url https://hdl.handle.net/20.500.14352/13385
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv American Meteorological Society
publisher.none.fl_str_mv American Meteorological Society
dc.source.none.fl_str_mv reponame:Docta Complutense
instname:Universidad Complutense de Madrid (UCM)
instname_str Universidad Complutense de Madrid (UCM)
reponame_str Docta Complutense
collection Docta Complutense
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869407851197235200
score 15,300724

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