Patagonian and southern South Atlantic view of Holocene climate
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 cl...
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ftconicet:oai:ri.conicet.gov.ar:11336/44297 2023-10-09T21:55:52+02:00 Patagonian and southern South Atlantic view of Holocene climate Kaplan, Michael Schaefer, Joerg STRELIN, Jorge Adrián Denton, George Anderson, R. F. Vandergoes, M. Finkel, R. Schwartz, Roseanne Travis, S. Garcia, J. L. Martini, Mateo Antonio Nielsen, S. H. H. application/pdf http://hdl.handle.net/11336/44297 eng eng Pergamon-Elsevier Science Ltd info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0277379116300750 info:eu-repo/semantics/altIdentifier/doi/10.1016/j.quascirev.2016.03.014 http://hdl.handle.net/11336/44297 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 0277-3791 CONICET Digital CONICET info:eu-repo/semantics/restrictedAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ COSMOGENIC DATING PATAGONIA SOUTH ATLANTIC OCEAN PALEOCLIMATE 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.quascirev.2016.03.014 2023-09-24T18:58:19Z 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 ... Article in Journal/Newspaper Sea ice South Atlantic Ocean CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) Patagonia Pacific Argentino Quaternary Science Reviews 141 112 125 |
institution |
Open Polar |
collection |
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) |
op_collection_id |
ftconicet |
language |
English |
topic |
COSMOGENIC DATING PATAGONIA SOUTH ATLANTIC OCEAN PALEOCLIMATE https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
spellingShingle |
COSMOGENIC DATING PATAGONIA SOUTH ATLANTIC OCEAN PALEOCLIMATE https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 Kaplan, Michael Schaefer, Joerg STRELIN, Jorge Adrián Denton, George Anderson, R. F. Vandergoes, M. Finkel, R. Schwartz, Roseanne Travis, S. Garcia, J. L. Martini, Mateo Antonio Nielsen, S. H. H. Patagonian and southern South Atlantic view of Holocene climate |
topic_facet |
COSMOGENIC DATING PATAGONIA SOUTH ATLANTIC OCEAN PALEOCLIMATE https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
description |
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 ... |
format |
Article in Journal/Newspaper |
author |
Kaplan, Michael Schaefer, Joerg STRELIN, Jorge Adrián Denton, George Anderson, R. F. Vandergoes, M. Finkel, R. Schwartz, Roseanne Travis, S. Garcia, J. L. Martini, Mateo Antonio Nielsen, S. H. H. |
author_facet |
Kaplan, Michael Schaefer, Joerg STRELIN, Jorge Adrián Denton, George Anderson, R. F. Vandergoes, M. Finkel, R. Schwartz, Roseanne Travis, S. Garcia, J. L. Martini, Mateo Antonio Nielsen, S. H. H. |
author_sort |
Kaplan, Michael |
title |
Patagonian and southern South Atlantic view of Holocene climate |
title_short |
Patagonian and southern South Atlantic view of Holocene climate |
title_full |
Patagonian and southern South Atlantic view of Holocene climate |
title_fullStr |
Patagonian and southern South Atlantic view of Holocene climate |
title_full_unstemmed |
Patagonian and southern South Atlantic view of Holocene climate |
title_sort |
patagonian and southern south atlantic view of holocene climate |
publisher |
Pergamon-Elsevier Science Ltd |
url |
http://hdl.handle.net/11336/44297 |
geographic |
Patagonia Pacific Argentino |
geographic_facet |
Patagonia Pacific Argentino |
genre |
Sea ice South Atlantic Ocean |
genre_facet |
Sea ice South Atlantic Ocean |
op_relation |
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0277379116300750 info:eu-repo/semantics/altIdentifier/doi/10.1016/j.quascirev.2016.03.014 http://hdl.handle.net/11336/44297 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 0277-3791 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.quascirev.2016.03.014 |
container_title |
Quaternary Science Reviews |
container_volume |
141 |
container_start_page |
112 |
op_container_end_page |
125 |
_version_ |
1779320071384989696 |