The paleoclimatic message from the polymodal grain-size distribution of late Pleistocene-early Holocene Pampean loess (Argentina)
Wind-blown dust deposits are considered one of the most important terrestrial archives for past climate change studies. In the Southern Hemisphere, the Pampean loess is the most extensive paleo-dust record, whose origin is still a matter of debate. In this paper, grain-size was carried out at three...
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ftconicet:oai:ri.conicet.gov.ar:11336/146617 2023-10-09T21:47:07+02:00 The paleoclimatic message from the polymodal grain-size distribution of late Pleistocene-early Holocene Pampean loess (Argentina) Torre, Gabriela Gaiero, Diego Marcelo Cosentino, Nicolas Juan Coppo, Renata application/pdf http://hdl.handle.net/11336/146617 eng eng Elsevier B.V. info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S1875963719301429 info:eu-repo/semantics/altIdentifier/doi/10.1016/j.aeolia.2019.100563 http://hdl.handle.net/11336/146617 Torre, Gabriela; Gaiero, Diego Marcelo; Cosentino, Nicolas Juan; Coppo, Renata; The paleoclimatic message from the polymodal grain-size distribution of late Pleistocene-early Holocene Pampean loess (Argentina); Elsevier B.V.; Aeolian Research; 42; 1-2020; 1-12 1875-9637 CONICET Digital CONICET info:eu-repo/semantics/restrictedAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ LOESS PAMPAS GRAIN-SIZE SOUTH AMERICA https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion ftconicet https://doi.org/10.1016/j.aeolia.2019.100563 2023-09-24T18:21:07Z Wind-blown dust deposits are considered one of the most important terrestrial archives for past climate change studies. In the Southern Hemisphere, the Pampean loess is the most extensive paleo-dust record, whose origin is still a matter of debate. In this paper, grain-size was carried out at three high-resolution loess profiles deposited during the late Pleistocene-early Holocene and for present-day dust collected on the Pampean plain. Based on comparing loess records with in situ present-day dust, this work aims to provide constraints on the climatic conditions that allowed deposition of the Argentinean loess mantle. Unmixing methods allow differentiating three grain-size subpopulations/end members in the Pampean loess which are comparable to end members found in present-day dust. The provenance and transport conditions observed for present-day dust were used to infer that the fine silt components of Pampean loess were transported by high-level air stream associated with the deflation of the Puna-Altiplano Plateau. On the other side, the coarse-silt sediments were carried by dust storms associated with high transport energy events taking place in proximal dust sources. In the central Pampas, the increased abundance of coarse-silt sediments during the Antarctic Cold Reversal (ACR) may indicate the existence of an increased frequency of dust storm episodes. During the beginning of the Holocene, the rise in fine-silt loess could be linked to the activation of distant sources associated with lake desiccation in the Puna-Altiplano Plateau. Fil: Torre, Gabriela. 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 Fil: Gaiero, Diego Marcelo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de ... Article in Journal/Newspaper Antarc* Antarctic CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) Antarctic The Antarctic Argentina Torre ENVELOPE(-59.729,-59.729,-62.413,-62.413) Aeolian Research 42 100563 |
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Open Polar |
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CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) |
op_collection_id |
ftconicet |
language |
English |
topic |
LOESS PAMPAS GRAIN-SIZE SOUTH AMERICA https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
spellingShingle |
LOESS PAMPAS GRAIN-SIZE SOUTH AMERICA https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 Torre, Gabriela Gaiero, Diego Marcelo Cosentino, Nicolas Juan Coppo, Renata The paleoclimatic message from the polymodal grain-size distribution of late Pleistocene-early Holocene Pampean loess (Argentina) |
topic_facet |
LOESS PAMPAS GRAIN-SIZE SOUTH AMERICA https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
description |
Wind-blown dust deposits are considered one of the most important terrestrial archives for past climate change studies. In the Southern Hemisphere, the Pampean loess is the most extensive paleo-dust record, whose origin is still a matter of debate. In this paper, grain-size was carried out at three high-resolution loess profiles deposited during the late Pleistocene-early Holocene and for present-day dust collected on the Pampean plain. Based on comparing loess records with in situ present-day dust, this work aims to provide constraints on the climatic conditions that allowed deposition of the Argentinean loess mantle. Unmixing methods allow differentiating three grain-size subpopulations/end members in the Pampean loess which are comparable to end members found in present-day dust. The provenance and transport conditions observed for present-day dust were used to infer that the fine silt components of Pampean loess were transported by high-level air stream associated with the deflation of the Puna-Altiplano Plateau. On the other side, the coarse-silt sediments were carried by dust storms associated with high transport energy events taking place in proximal dust sources. In the central Pampas, the increased abundance of coarse-silt sediments during the Antarctic Cold Reversal (ACR) may indicate the existence of an increased frequency of dust storm episodes. During the beginning of the Holocene, the rise in fine-silt loess could be linked to the activation of distant sources associated with lake desiccation in the Puna-Altiplano Plateau. Fil: Torre, Gabriela. 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 Fil: Gaiero, Diego Marcelo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de ... |
format |
Article in Journal/Newspaper |
author |
Torre, Gabriela Gaiero, Diego Marcelo Cosentino, Nicolas Juan Coppo, Renata |
author_facet |
Torre, Gabriela Gaiero, Diego Marcelo Cosentino, Nicolas Juan Coppo, Renata |
author_sort |
Torre, Gabriela |
title |
The paleoclimatic message from the polymodal grain-size distribution of late Pleistocene-early Holocene Pampean loess (Argentina) |
title_short |
The paleoclimatic message from the polymodal grain-size distribution of late Pleistocene-early Holocene Pampean loess (Argentina) |
title_full |
The paleoclimatic message from the polymodal grain-size distribution of late Pleistocene-early Holocene Pampean loess (Argentina) |
title_fullStr |
The paleoclimatic message from the polymodal grain-size distribution of late Pleistocene-early Holocene Pampean loess (Argentina) |
title_full_unstemmed |
The paleoclimatic message from the polymodal grain-size distribution of late Pleistocene-early Holocene Pampean loess (Argentina) |
title_sort |
paleoclimatic message from the polymodal grain-size distribution of late pleistocene-early holocene pampean loess (argentina) |
publisher |
Elsevier B.V. |
url |
http://hdl.handle.net/11336/146617 |
long_lat |
ENVELOPE(-59.729,-59.729,-62.413,-62.413) |
geographic |
Antarctic The Antarctic Argentina Torre |
geographic_facet |
Antarctic The Antarctic Argentina Torre |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S1875963719301429 info:eu-repo/semantics/altIdentifier/doi/10.1016/j.aeolia.2019.100563 http://hdl.handle.net/11336/146617 Torre, Gabriela; Gaiero, Diego Marcelo; Cosentino, Nicolas Juan; Coppo, Renata; The paleoclimatic message from the polymodal grain-size distribution of late Pleistocene-early Holocene Pampean loess (Argentina); Elsevier B.V.; Aeolian Research; 42; 1-2020; 1-12 1875-9637 CONICET Digital CONICET |
op_rights |
info:eu-repo/semantics/restrictedAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
op_doi |
https://doi.org/10.1016/j.aeolia.2019.100563 |
container_title |
Aeolian Research |
container_volume |
42 |
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100563 |
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1779309878347563008 |