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dc.contributor.author
Junquas, C.
dc.contributor.author
Vera, Carolina Susana
dc.contributor.author
Li, L.
dc.contributor.author
Le Treut, H.
dc.date.available
2016-02-26T20:44:01Z
dc.date.issued
2013-04
dc.identifier.citation
Junquas, C.; Vera, Carolina Susana; Li, L.; Le Treut, H.; Impact of projected SST changes on summer rainfall in southeastern South America; Springer; Climate Dynamics; 40; 7; 4-2013; 1569-1589
dc.identifier.issn
0930-7575
dc.identifier.uri
http://hdl.handle.net/11336/4487
dc.description.abstract
Recent studies have shown that global warming and associated sea-surface temperature (SST) changes may trigger an important rainfall increase in Southeastern South America (SESA) during the austral summer (December-January-February, DJF). The goal of this paper is to provide some insight into processes which may link global and SESA changes. For this purpose, a “two-way nesting” system coupling interactively the regional and global versions of the LMDZ4 atmospheric model is used to study the response to prescribed SST changes. The regional model is a variable grid version of the global model, with a zoom focused over South America. An ensemble of simulations forced by distinct patterns of DJF SST changes has been carried out using a decomposition of full SST changes into their longitudinal and latitudinal components. The full SST changes are based on projections for the end of the twenty-first century from a multi-model ensemble of WCRP/CMIP3. Results confirm the presence of a major rainfall dipole structure, characterized by an increase in SESA and a decrease in the South Atlantic Convergence Zone region. Rainfall changes found in the WCRP/CMIP3 models are largely explained as a response of this dipole structure to the zonally-asymmetric (or longitudinal) component of SST changes. The rainfall response to the zonal-mean (or latitudinal) SST changes (including the global warming signal itself) shows an opposite contribution. The processes explaining the role of zonally asymmetric SST changes involve remote effects of SST warming over the equatorial Indian and Pacific oceans inducing an atmospheric wave-train extended across the South Pacific into South America.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Springer
dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
South America Climate
dc.subject
Rainfall Changes
dc.subject
Two-Way Nesting System
dc.subject
Sea Surface Temperature Projections
dc.subject.classification
Investigación Climatológica
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Ciencias de la Tierra y relacionadas con el Medio Ambiente
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
Impact of projected SST changes on summer rainfall in southeastern South America
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2016-03-30 10:35:44.97925-03
dc.journal.volume
40
dc.journal.number
7
dc.journal.pagination
1569-1589
dc.journal.pais
Alemania
dc.journal.ciudad
Berlin
dc.description.fil
Fil: Junquas, C.. Laboratoire de Météorologie Dynamique; Francia. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinacion Administrativa Ciudad Universitaria. Centro de Investigaciones del Mar y la Atmósfera; Argentina
dc.description.fil
Fil: Vera, Carolina Susana. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinacion Administrativa Ciudad Universitaria. Centro de Investigaciones del Mar y la Atmósfera; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinacion Administrativa Ciudad Universitaria. Centro de Investigaciones del Mar y la Atmósfera; Argentina
dc.description.fil
Fil: Li, L.. Laboratoire de Météorologie Dynamique; Francia
dc.description.fil
Fil: Le Treut, H.. Laboratoire de Météorologie Dynamique; Francia
dc.journal.title
Climate Dynamics
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://link.springer.com/article/10.1007/s00382-013-1695-y
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1007/s00382-013-1695-y
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/issn/0930-7575


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