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dc.contributor.author
Tripaldi, Alfonsina  
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Zárate, Marcelo Arístides  
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Forman, Steven L.  
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Badger, Timothy  
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Doyle, Moira Evelina  
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Ciccioli, Patricia Lucia  
dc.date.available
2016-03-01T18:48:01Z  
dc.date.issued
2013-12  
dc.identifier.citation
Tripaldi, Alfonsina; Zárate, Marcelo Arístides; Forman, Steven L.; Badger, Timothy; Doyle, Moira Evelina; et al.; Geological evidence for a drought episode in the western Pampas (Argentina, South America) duringthe early–mid 20th century; Sage Publications; Holocene (sevenoaks); 23; 12; 12-2013; 1731-1746  
dc.identifier.issn
0959-6836  
dc.identifier.uri
http://hdl.handle.net/11336/4558  
dc.description.abstract
Drought episodes during the early–mid 20th century were recognized and described in several places around the world, with extreme dry conditions and widespread landscape denudation, like during the famous ‘Dust Bowl’ in North America. However, there is scant documentation of droughts in southern South America, particularly from the Pampas, and none based on the geological record. In this article, we provide clear evidence of aeolian reactivation and sand deposition in some areas of La Pampa and San Luis provinces, western Pampas (Argentina), during early–mid 20th century in response to drier conditions, probably amplified, like historic droughts in North America, by anthropogenic factors (e.g. significant population increase and agriculture expansion into a fragile environment). Evidence includes widespread bare sand blowouts, extensive surfaces with active sand migration, steep dune lee slopes, and sharp crests covered by weak soil development (A/C profile), accompanied by historical documents. Optically stimulated luminescence (OSL) ages on aeolian beds confirm mobilization and sedimentation by wind processes c. 95–60 yr BP. Considering the dominant (over 70%) austral spring–summer precipitation, it is possible the rainfall deficit in western Pampas was linked to positive sea surface temperature (SST) anomalies in the western subtropical South Atlantic Ocean (20–30°S and 30–50° W), according to significant canonical correlation between the precipitation field in subtropical South America and the Atlantic Ocean SST anomalies.  
dc.format
application/pdf  
dc.language.iso
eng  
dc.publisher
Sage Publications  
dc.rights
info:eu-repo/semantics/openAccess  
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/  
dc.subject
20 Th Century  
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Aeolian Record  
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Optically Stimulated Luminescence Dating  
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Pampas Dustbowl  
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South America  
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Western Pampas  
dc.subject.classification
Geología  
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Ciencias de la Tierra y relacionadas con el Medio Ambiente  
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CIENCIAS NATURALES Y EXACTAS  
dc.title
Geological evidence for a drought episode in the western Pampas (Argentina, South America) duringthe early–mid 20th century  
dc.type
info:eu-repo/semantics/article  
dc.type
info:ar-repo/semantics/artículo  
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info:eu-repo/semantics/publishedVersion  
dc.date.updated
2016-03-30 10:35:44.97925-03  
dc.journal.volume
23  
dc.journal.number
12  
dc.journal.pagination
1731-1746  
dc.journal.pais
Estados Unidos  
dc.journal.ciudad
London  
dc.description.fil
Fil: Tripaldi, Alfonsina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires; Argentina  
dc.description.fil
Fil: Zárate, Marcelo Arístides. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Ciencias de la Tierra y Ambientales de La Pampa; Argentina  
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Fil: Forman, Steven L.. University Of Chicago; Estados Unidos  
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Fil: Badger, Timothy. University Of Chicago; Estados Unidos  
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Fil: Doyle, Moira Evelina. 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 Coordinación Administrativa Ciudad Universitaria. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires; Argentina  
dc.description.fil
Fil: Ciccioli, Patricia Lucia. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires; Argentina  
dc.journal.title
Holocene (sevenoaks)  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1177/0959683613505338  
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info:eu-repo/semantics/altIdentifier/url/http://hol.sagepub.com/content/23/12/1731.abstract  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://hol.sagepub.com/content/23/12/1731.abstracthttp://hol.sagepub.com/content/23/12/1731.abstract  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/issn/0959-6836