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dc.contributor.author
Alvarez, Mariano Sebastián  
dc.contributor.author
Vera, Carolina Susana  
dc.contributor.author
Kiladis, G. N.  
dc.contributor.author
Liebmann, Brant  
dc.date.available
2018-01-03T18:49:11Z  
dc.date.issued
2014-06  
dc.identifier.citation
Liebmann, Brant; Kiladis, G. N.; Vera, Carolina Susana; Alvarez, Mariano Sebastián; Intraseasonal Variability In South America during the Cold Season; Springer; Climate Dynamics; 42; 11-12; 6-2014; 3253-3269  
dc.identifier.issn
0930-7575  
dc.identifier.uri
http://hdl.handle.net/11336/32171  
dc.description.abstract
Intraseasonal (IS) variability in South America is analyzed during the cold season using 10-90 day bandpass filtered OLR anomalies (FOLR). IS variability explains a large percentage of variance with maximum values over Paraguay, northeastern Argentina, and southern Brazil. The leading pattern of FOLR, as isolated from an EOF analysis, (Cold Season IS pattern, CSIS), is characterized by a monopole centered over southeastern South America (SESA) with a northwest-southeast orientation. CSIS induces a large modulation on daily precipitation anomalies, especially on both wet spells and daily precipitation extremes, which are favored during positive (wet) CSIS phases. Large-Scale OLR anomalies over the tropical Indian and west Pacific Oceans associated with CSIS exhibit eastward propagation along tropical latitudes. In addition, circulation anomalies in the Southern Hemisphere reveal the presence of an anticyclonic anomaly over Antarctica with opposite-sign anomalies in middle latitudes 10 days before CSIS is maximum as well as evidence of Rossby wave-like patterns. Positive precipitation anomalies in SESA are favored during wet CSIS phases by the intensification of a cyclonic anomaly located further south, which is discernible over the southeastern Pacific for at least 14 days before CSIS peaks. The cyclonic anomaly evolution is accompanied by the intensification of an upstream anticyclonic anomaly, which remains quasi-stationary near the Antarctica Peninsula before the CSIS peak. We speculate that the stationary behavior of the anticyclonic center is favored by a hemispheric circulation anomaly pattern resembling that associated with a negative Southern Annular Mode (SAM) phase and a wavenumber 3-4 pattern at middle latitudes.  
dc.format
application/pdf  
dc.language.iso
eng  
dc.publisher
Springer  
dc.rights
info:eu-repo/semantics/openAccess  
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/  
dc.subject
Intraseasonal Variability  
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Winter  
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Outgoing Longwave Radiation  
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South America  
dc.subject.classification
Meteorología y Ciencias Atmosféricas  
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Ciencias de la Tierra y relacionadas con el Medio Ambiente  
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CIENCIAS NATURALES Y EXACTAS  
dc.title
Intraseasonal Variability In South America during the Cold Season  
dc.type
info:eu-repo/semantics/article  
dc.type
info:ar-repo/semantics/artículo  
dc.type
info:eu-repo/semantics/publishedVersion  
dc.date.updated
2017-12-29T14:22:41Z  
dc.journal.volume
42  
dc.journal.number
11-12  
dc.journal.pagination
3253-3269  
dc.journal.pais
Alemania  
dc.journal.ciudad
Berlin  
dc.description.fil
Fil: Alvarez, Mariano Sebastián. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Centro de Investigaciones del Mar y la Atmosfera. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Centro de Investigaciones del Mar y la Atmosfera; Argentina  
dc.description.fil
Fil: Vera, Carolina Susana. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Centro de Investigaciones del Mar y la Atmosfera. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Centro de Investigaciones del Mar y la Atmosfera; Argentina  
dc.description.fil
Fil: Kiladis, G. N.. Earth System Research Laboratory, ; Estados Unidos  
dc.description.fil
Fil: Liebmann, Brant. State University of Colorado Boulder; Estados Unidos  
dc.journal.title
Climate Dynamics  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://link.springer.com/article/10.1007%2Fs00382-013-1872-z  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/https://doi.org/10.1007/s00382-013-1872-z