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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
2016-09-06T20:20:40Z
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) during the early-mid 20th century; Sage Publications Ltd; Holocene (sevenoaks); 23; 12; 12-2013; 1729-1744
dc.identifier.issn
0959-6836
dc.identifier.uri
http://hdl.handle.net/11336/7497
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 0deposition 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sand migration, steep dune lee slopes and sharp crests covered by weak soil development (A/C profile), accompanied by historical documents. OSL ages on aeolian beds confirm mobilization and sedimentation by wind processes ca. 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 SST anomalies in the western subtropical South Atlantic Ocean (20º-30º S and 30º-50º 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 Ltd
dc.rights
info:eu-repo/semantics/restrictedAccess
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
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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) during the early-mid 20th century
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2016-02-25T18:16:05Z
dc.journal.volume
23
dc.journal.number
12
dc.journal.pagination
1729-1744
dc.journal.pais
Reino Unido
dc.journal.ciudad
Londres
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
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Fil: Zárate, Marcelo Arístides. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Instituto de Ciencias de la Tierra y Ambientales de la Pampa; Argentina
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Fil: Forman, Steven L.. University Of Illinois; Estados Unidos
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Fil: Badger, Timothy. University Of Illinois; Estados Unidos
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Fil: Doyle, Moira Evelina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires; 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: 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/url/http://hol.sagepub.com/content/23/12/1731.abstract
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info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1177/0959683613505338