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dc.contributor.author
Guerra, Lucía  
dc.contributor.author
Piovano, Eduardo Luis  
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Cordoba, Francisco Elizalde  
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Tachikawa, Kazuyo  
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Rostek, Frauke  
dc.contributor.author
Garcia, Marta  
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Bard, Edouard  
dc.contributor.author
Sylvestre, Florence  
dc.date.available
2018-05-04T17:24:09Z  
dc.date.issued
2016-06  
dc.identifier.citation
Guerra, Lucía; Piovano, Eduardo Luis; Cordoba, Francisco Elizalde; Tachikawa, Kazuyo; Rostek, Frauke; et al.; Climate change evidences from the end of the Little Ice Age to the Current Warm Period registered by Melincué Lake (Northern Pampas, Argentina); Pergamon-Elsevier Science Ltd; Quaternary International; 6-2016  
dc.identifier.issn
1040-6182  
dc.identifier.uri
http://hdl.handle.net/11336/44151  
dc.description.abstract
Geochemical, sedimentological, historical and instrumental information from Melincué Lake (33° 43?S /61°28? W) was analyzed in order to reconstruct main hydro-climatic changes along the Pampean region, considering the end of theLittle Ice Age (LIA) and the Current Warm Period (CWP) climatic phases. Elemental X-ray fluorescence determinations were performed on a dated short core extracted from the deepest part of the lake. Chemical (Ca, Sr, Al, K, Si, Ti and Fe) variation was analyzed along with physical (magnetic susceptibility, dry bulk density and medium particle size) and mineralogical proxies, as well as carbon and nitrogen contents (organic and inorganic carbon and organic nitrogen). Multicomponent statistical analyses allowed the identification of the main environmental processes ruling sedimentation, which included carbonate precipitation, detrital input and primary productivity. Homogeneous, carbonate-rich, detrital-rich and organic matter-poor deposits reflect very shallow and ephemeral lake conditions during the last years of the LIA period. Very low sedimentation rates and the presence of discontinuities in the sedimentary record pointed to episodes of extensive lake shrinkages and probable lake-floor subaerial exposures. Bedded and laminated organic-rich muds accumulated in perennial lake conditions after ca. AD 1880 reveal an important environmental change concurrent with the onset of the Current Warm Period. The contrast of sediment composition and lithological characteristics with the instrumental record of the CWP allowed us to consider the development of a shallow saline-lake system, enhanced detrital input and carbonate precipitation during dry periods. In turn, higher lake levels, and thus more diluted lake-waters during wetter periods, resulted in enhanced organic lake productivity and lower carbonate precipitation. The comparison of the paleolimnological reconstruction from Melincué Lake to different hydrological and paleoclimatic records (i.e. limnimetric measurements and ocean temperature changes) suggests that the moisture variation registered between the LIA and the CWP was consistent with (and likely forced by) large-scale climatic oscillations. The present study provides new evidences to evaluate the climate and environmental changes in central Argentina related to the dynamics of the South American Monsoon systemduring the last five centuries.  
dc.format
application/pdf  
dc.language.iso
eng  
dc.publisher
Pergamon-Elsevier Science Ltd  
dc.rights
info:eu-repo/semantics/openAccess  
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/  
dc.subject
Argentinean Pampean Lakes  
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Lacustrine Sediments  
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X-Ray Fluorescence  
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South American Monsoon  
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Current Warm Period  
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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
Climate change evidences from the end of the Little Ice Age to the Current Warm Period registered by Melincué Lake (Northern Pampas, Argentina)  
dc.type
info:eu-repo/semantics/article  
dc.type
info:ar-repo/semantics/artículo  
dc.type
info:eu-repo/semantics/publishedVersion  
dc.date.updated
2018-05-02T17:39:26Z  
dc.journal.pais
Estados Unidos  
dc.description.fil
Fil: Guerra, Lucía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones en Ciencias de la Tierra. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones en Ciencias de la Tierra; Argentina  
dc.description.fil
Fil: Piovano, Eduardo Luis. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones en Ciencias de la Tierra. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones en Ciencias de la Tierra; Argentina  
dc.description.fil
Fil: Cordoba, Francisco Elizalde. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro de Investigaciones y Transferencia de Jujuy. Universidad Nacional de Jujuy. Centro de Investigaciones y Transferencia de Jujuy; Argentina  
dc.description.fil
Fil: Tachikawa, Kazuyo. Centre National de la Recherche Scientifique; Francia. Aix-Marseille Université; Francia  
dc.description.fil
Fil: Rostek, Frauke. Aix-Marseille Université; Francia. Centre National de la Recherche Scientifique; Francia  
dc.description.fil
Fil: Garcia, Marta. Aix-Marseille Université; Francia. Centre National de la Recherche Scientifique; Francia  
dc.description.fil
Fil: Bard, Edouard. Aix-Marseille Université; Francia. Centre National de la Recherche Scientifique; Francia  
dc.description.fil
Fil: Sylvestre, Florence. Aix-Marseille Université; Francia. Centre National de la Recherche Scientifique; Francia  
dc.journal.title
Quaternary International  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S1040618215302937  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.quaint.2016.06.033