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dc.contributor.author
Kaplan, Michael
dc.contributor.author
Schaefer, Joerg
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STRELIN, Jorge Adrián
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dc.contributor.author
Denton, George
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Anderson, R. F.
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Vandergoes, M.
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Finkel, R.
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Schwartz, Roseanne
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Travis, S.
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Garcia, J. L.
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Martini, Mateo Antonio
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dc.contributor.author
Nielsen, S. H. H.
dc.date.available
2018-05-07T16:40:56Z
dc.date.issued
2016-04
dc.identifier.citation
Kaplan, Michael; Schaefer, Joerg; STRELIN, Jorge Adrián; Denton, George; Anderson, R. F. ; et al.; Patagonian and southern South Atlantic view of Holocene climate; Pergamon-Elsevier Science Ltd; Quaternary Science Reviews; 141; 4-2016; 112-125
dc.identifier.issn
0277-3791
dc.identifier.uri
http://hdl.handle.net/11336/44297
dc.description.abstract
We present a comprehensive 10Be chronology for Holocene moraines in the Lago Argentino basin, on the east side of the South Patagonian Icefield. We focus on three different areas, where prior studies show ample glacier moraine records exist because they were formed by outlet glaciers sensitive to climate change. The 10Be dated records are from the Lago Pearson, Herminita Península-Brazo Upsala, and Lago Frías areas, which span a distance of almost 100 km adjacent to the modern Icefield. New 10Be ages show that expanded glaciers and moraine building events occurred at least at 6120 ± 390 (n = 13), 4450 ± 220 (n = 7), 1450 or 1410 ± 110 (n = 18), 360 ± 30 (n = 5), and 240 ± 20 (n = 8) years ago. Furthermore, other less well-dated glacier expansions of the Upsala Glacier occurred between ~1400 and ∼1000 and ∼2300 and ∼2000 years ago. The most extensive glaciers occurred over the interval from ∼6100 to ∼4500 years ago, and their margins over the last ∼600 years were well within and lower than those in the middle Holocene. The 10Be ages agree with 14C-limiting data for the glacier histories in this area. We then link southern South American, adjacent South Atlantic, and other Southern Hemisphere records to elucidate broader regional patterns of climate and their possible causes. In the early Holocene, a far southward position of the westerly winds fostered warmth, small Patagonian glaciers, and reduced sea ice coverage over the South Atlantic. Although we infer a pronounced southward displacement of the westerlies during the early Holocene, these conditions did not occur throughout the southern mid-high latitudes, an important exception being over the southwest Pacific sector. Subsequently, a northward locus and/or expansion of the winds over the Patagonia-South Atlantic sector promoted the largest glaciers between ∼6100 and ∼4500 years ago and greatest sea ice coverage. Over the last few millennia, the South Patagonian Icefield has experienced successive century-scale advances superimposed on a long-term net decrease in size. Our findings indicate that glaciers and sea ice in the Patagonian-South Atlantic sector of the Southern Hemisphere did not achieve their largest Holocene extents over the last millennium. We conclude that a pattern of more extensive Holocene ice prior to the last millennium is characteristic of the Southern Hemisphere middle latitudes, which differs from the glacier history traditionally thought for the Northern Hemisphere.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Pergamon-Elsevier Science Ltd
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Cosmogenic Dating
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Patagonia
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South Atlantic Ocean
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Paleoclimate
dc.subject.classification
Meteorología y Ciencias Atmosféricas
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dc.subject.classification
Ciencias de la Tierra y relacionadas con el Medio Ambiente
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
Patagonian and southern South Atlantic view of Holocene climate
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-05-02T17:40:07Z
dc.journal.volume
141
dc.journal.pagination
112-125
dc.journal.pais
Estados Unidos
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dc.description.fil
Fil: Kaplan, Michael. Lamont Doherty Earth Observatory; Estados Unidos
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Fil: Schaefer, Joerg. Lamont Doherty Earth Observatory; Estados Unidos
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Fil: STRELIN, Jorge Adrián. 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: Denton, George. Lamont Doherty Earth Observatory; Estados Unidos. University Of Maine; Estados Unidos
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Fil: Anderson, R. F.. University Of Maine; Estados Unidos. Lamont Doherty Earth Observatory; Estados Unidos
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Fil: Vandergoes, M.. GNS Science; Estados Unidos
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Fil: Finkel, R.. California State University; Estados Unidos
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Fil: Schwartz, Roseanne. Lamont Doherty Earth Observatory; Estados Unidos
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Fil: Travis, S.. General Communication Inc.; Estados Unidos
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Fil: Garcia, J. L.. University Of Maine; Estados Unidos. Pontificia Universidad Católica de Chile; Chile
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Fil: Martini, Mateo Antonio. 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: Nielsen, S. H. H.. Kenex Ltd.; Nueva Zelanda
dc.journal.title
Quaternary Science Reviews
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0277379116300750
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.quascirev.2016.03.014
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