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dc.contributor.author Scheffler, Guillermo Federico
dc.contributor.author Pulido, Manuel Arturo
dc.date.available 2018-05-21T19:39:38Z
dc.date.issued 2015-11
dc.identifier.citation Scheffler, Guillermo Federico; Pulido, Manuel Arturo; Compensation between Resolved and Unresolved Wave Drag in the Stratospheric Final Warmings of the Southern Hemisphere; American Meteorological Society; Journal of The Atmospheric Sciences; 72; 11; 11-2015; 4393-4411
dc.identifier.issn 0022-4928
dc.identifier.uri http://hdl.handle.net/11336/45804
dc.description.abstract The role of planetary wave drag and gravity wave drag in the breakdown of the stratospheric polar vortex and its associated final warming in the Southern hemisphere is examined using MERRA reanalyses, and a middle atmosphere dynamical model. The focus of this work is on identifying the causes of the delay in the final breakdown of the stratospheric polar vortex found in current general circulation models. Sensitivity experiments were conducted by changing the launched momentum flux in the gravity wave drag parameterization. Increasing the launched momentum flux  produces a delay of the final warming date with respect to the control integration of more than 2 weeks.  The sensitivity experiments show significant interactions between planetary waves and unresolved gravity waves. The increase of gravity wave drag in the model is compensated by a strong decrease of Eliassen-Palm flux divergence, i.e. planetary wave drag. This concomitant decrease of planetary wave drag is at least partially responsible for the delay of the final warming in the model. Experiments that change the resolved planetary wave activity  entering the stratosphere through artificially changing the bottom boundary flux of the model also show an interaction mechanism. Gravity wave drag  responds via critical level filtering to planetary wave drag perturbations by partially compensating them. Therefore, there is a feedback cycle that leads to a partial compensation between gravity wave and planetary wave drag.
dc.format application/pdf
dc.language.iso eng
dc.publisher American Meteorological Society
dc.rights info:eu-repo/semantics/openAccess
dc.rights.uri https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject gravity wave drag
dc.subject planetary wave drag
dc.subject late warming
dc.subject vortex breakdown
dc.subject.classification Meteorología y Ciencias Atmosféricas
dc.subject.classification Ciencias de la Tierra y relacionadas con el Medio Ambiente
dc.subject.classification CIENCIAS NATURALES Y EXACTAS
dc.title Compensation between Resolved and Unresolved Wave Drag in the Stratospheric Final Warmings of the Southern Hemisphere
dc.type info:eu-repo/semantics/article
dc.type info:ar-repo/semantics/artículo
dc.type info:eu-repo/semantics/publishedVersion
dc.date.updated 2018-05-21T16:58:56Z
dc.journal.volume 72
dc.journal.number 11
dc.journal.pagination 4393-4411
dc.journal.pais Estados Unidos
dc.journal.ciudad Boston
dc.description.fil Fil: Scheffler, Guillermo Federico. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Modelado e Innovación Tecnológica. Universidad Nacional del Nordeste. Facultad de Ciencias Exactas Naturales y Agrimensura. Instituto de Modelado e Innovación Tecnológica; Argentina
dc.description.fil Fil: Pulido, Manuel Arturo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Modelado e Innovación Tecnológica. Universidad Nacional del Nordeste. Facultad de Ciencias Exactas Naturales y Agrimensura. Instituto de Modelado e Innovación Tecnológica; Argentina
dc.journal.title Journal of The Atmospheric Sciences
dc.relation.alternativeid info:eu-repo/semantics/altIdentifier/url/https://journals.ametsoc.org/doi/abs/10.1175/JAS-D-14-0270.1
dc.relation.alternativeid info:eu-repo/semantics/altIdentifier/doi/https://doi.org/10.1175/JAS-D-14-0270.1
dc.conicet.fuente individual


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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)