DataSheet1_Late Glacial and Holocene Palaeolake History of the Última Esperanza Region of Southern Patagonia.pdf
We undertook multi-proxy analyses on two sediment cores from Lago Pato, a small lake basin at 51°S topographically separated from Lago del Toro in Torres del Paine (TdP), to provide insights into glacier dynamics and lake-level change in the TdP and Última Esperanza region over the last ∼30,000 cal...
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ftfrontimediafig:oai:figshare.com:article/19573885 2023-05-15T13:42:18+02:00 DataSheet1_Late Glacial and Holocene Palaeolake History of the Última Esperanza Region of Southern Patagonia.pdf Stephen J. Roberts Robert D. McCulloch Joseph F. Emmings Sarah J. Davies Wim Van Nieuwenhuyze Mieke Sterken Katrien Heirman Jeroen Van Wichelen Carolina Diaz Evelien Van de Vyver Alex Whittle Wim Vyverman Dominic A. Hodgson Elie Verleyen 2022-04-11T09:45:09Z https://doi.org/10.3389/feart.2022.813396.s001 https://figshare.com/articles/dataset/DataSheet1_Late_Glacial_and_Holocene_Palaeolake_History_of_the_ltima_Esperanza_Region_of_Southern_Patagonia_pdf/19573885 unknown doi:10.3389/feart.2022.813396.s001 https://figshare.com/articles/dataset/DataSheet1_Late_Glacial_and_Holocene_Palaeolake_History_of_the_ltima_Esperanza_Region_of_Southern_Patagonia_pdf/19573885 CC BY 4.0 CC-BY Solid Earth Sciences Climate Science Atmospheric Sciences not elsewhere classified Exploration Geochemistry Inorganic Geochemistry Isotope Geochemistry Organic Geochemistry Geochemistry not elsewhere classified Igneous and Metamorphic Petrology Ore Deposit Petrology Palaeontology (incl. Palynology) Structural Geology Tectonics Volcanology Geology not elsewhere classified Seismology and Seismic Exploration Glaciology Hydrogeology Natural Hazards Quaternary Environments Earth Sciences not elsewhere classified Evolutionary Impacts of Climate Change Last Glacial Maximum (LGM) palaeoclimate palaeolimnology glaciation lake-level changes Patagonia Southern Hemisphere westerly winds (SWW) Dataset 2022 ftfrontimediafig https://doi.org/10.3389/feart.2022.813396.s001 2022-04-13T23:06:14Z We undertook multi-proxy analyses on two sediment cores from Lago Pato, a small lake basin at 51°S topographically separated from Lago del Toro in Torres del Paine (TdP), to provide insights into glacier dynamics and lake-level change in the TdP and Última Esperanza region over the last ∼30,000 cal a BP (30 ka). Lago Pato is situated in a region overridden by the Southern Patagonian Ice Field during the Last Glacial and in a transitional climatic zone of Southern Patagonia sensitive to seasonal- to millennial-scale changes in the Southern Hemisphere Westerly Winds (SWW). Results show that a deep ice-dammed and enlarged palaeolake encompassed Lago del Toro and Lago Pato c. 30–20 ka after the ice had retreated from local-Last Glacial Maximum (l-LGM) limits at c. 48–34 ka and during the build-up to the global-Last Glacial Maximum (g-LGM), c. 26–19 ka. Gaps in both sediment records between c. 20–13.4 ka and c. 20–10 ka suggest hiatuses in sediment accumulation during the g-LGM and Antarctic Cold Reversal (ACR) readvances and/or removal by lake lowering or flushing during the Late Glacial–early Holocene. The palaeolake level dropped from >100 m a.s.l. to ∼40–50 m a.s.l. towards the end of the ACR c. 13.4–13.0 ka, creating a shallower glaciolacustrine environment dammed by an ice tongue in the Estancia Puerto Consuelo–Última Esperanza fjord. Further lowering of the enlarged palaeolake level occurred when the ice thinned to <40 m a.s.l., eventually isolating Lago Pato from Lago del Toro and glaciogenic sediment input at c. 11.7 ka. After isolation, the ecology and water levels in Lago Pato became sensitive to regional climate shifts. The shallow, stable, and highly anoxic environment that developed after c. 11.7 ka is associated with weaker (or poleward shifted) SWW at 51°S and was replaced at c. 10 ka by an increasingly productive shallow-littoral lake with a variable lake-level and periodic shifts in anoxic-oxic bottom water conditions and ratios of benthic-planktonic diatoms. A more open Nothofagus forest, ... Dataset Antarc* Antarctic Frontiers: Figshare Antarctic Patagonia Esperanza ENVELOPE(-56.983,-56.983,-63.400,-63.400) Paine ENVELOPE(-147.533,-147.533,-86.767,-86.767) |
institution |
Open Polar |
collection |
Frontiers: Figshare |
op_collection_id |
ftfrontimediafig |
language |
unknown |
topic |
Solid Earth Sciences Climate Science Atmospheric Sciences not elsewhere classified Exploration Geochemistry Inorganic Geochemistry Isotope Geochemistry Organic Geochemistry Geochemistry not elsewhere classified Igneous and Metamorphic Petrology Ore Deposit Petrology Palaeontology (incl. Palynology) Structural Geology Tectonics Volcanology Geology not elsewhere classified Seismology and Seismic Exploration Glaciology Hydrogeology Natural Hazards Quaternary Environments Earth Sciences not elsewhere classified Evolutionary Impacts of Climate Change Last Glacial Maximum (LGM) palaeoclimate palaeolimnology glaciation lake-level changes Patagonia Southern Hemisphere westerly winds (SWW) |
spellingShingle |
Solid Earth Sciences Climate Science Atmospheric Sciences not elsewhere classified Exploration Geochemistry Inorganic Geochemistry Isotope Geochemistry Organic Geochemistry Geochemistry not elsewhere classified Igneous and Metamorphic Petrology Ore Deposit Petrology Palaeontology (incl. Palynology) Structural Geology Tectonics Volcanology Geology not elsewhere classified Seismology and Seismic Exploration Glaciology Hydrogeology Natural Hazards Quaternary Environments Earth Sciences not elsewhere classified Evolutionary Impacts of Climate Change Last Glacial Maximum (LGM) palaeoclimate palaeolimnology glaciation lake-level changes Patagonia Southern Hemisphere westerly winds (SWW) Stephen J. Roberts Robert D. McCulloch Joseph F. Emmings Sarah J. Davies Wim Van Nieuwenhuyze Mieke Sterken Katrien Heirman Jeroen Van Wichelen Carolina Diaz Evelien Van de Vyver Alex Whittle Wim Vyverman Dominic A. Hodgson Elie Verleyen DataSheet1_Late Glacial and Holocene Palaeolake History of the Última Esperanza Region of Southern Patagonia.pdf |
topic_facet |
Solid Earth Sciences Climate Science Atmospheric Sciences not elsewhere classified Exploration Geochemistry Inorganic Geochemistry Isotope Geochemistry Organic Geochemistry Geochemistry not elsewhere classified Igneous and Metamorphic Petrology Ore Deposit Petrology Palaeontology (incl. Palynology) Structural Geology Tectonics Volcanology Geology not elsewhere classified Seismology and Seismic Exploration Glaciology Hydrogeology Natural Hazards Quaternary Environments Earth Sciences not elsewhere classified Evolutionary Impacts of Climate Change Last Glacial Maximum (LGM) palaeoclimate palaeolimnology glaciation lake-level changes Patagonia Southern Hemisphere westerly winds (SWW) |
description |
We undertook multi-proxy analyses on two sediment cores from Lago Pato, a small lake basin at 51°S topographically separated from Lago del Toro in Torres del Paine (TdP), to provide insights into glacier dynamics and lake-level change in the TdP and Última Esperanza region over the last ∼30,000 cal a BP (30 ka). Lago Pato is situated in a region overridden by the Southern Patagonian Ice Field during the Last Glacial and in a transitional climatic zone of Southern Patagonia sensitive to seasonal- to millennial-scale changes in the Southern Hemisphere Westerly Winds (SWW). Results show that a deep ice-dammed and enlarged palaeolake encompassed Lago del Toro and Lago Pato c. 30–20 ka after the ice had retreated from local-Last Glacial Maximum (l-LGM) limits at c. 48–34 ka and during the build-up to the global-Last Glacial Maximum (g-LGM), c. 26–19 ka. Gaps in both sediment records between c. 20–13.4 ka and c. 20–10 ka suggest hiatuses in sediment accumulation during the g-LGM and Antarctic Cold Reversal (ACR) readvances and/or removal by lake lowering or flushing during the Late Glacial–early Holocene. The palaeolake level dropped from >100 m a.s.l. to ∼40–50 m a.s.l. towards the end of the ACR c. 13.4–13.0 ka, creating a shallower glaciolacustrine environment dammed by an ice tongue in the Estancia Puerto Consuelo–Última Esperanza fjord. Further lowering of the enlarged palaeolake level occurred when the ice thinned to <40 m a.s.l., eventually isolating Lago Pato from Lago del Toro and glaciogenic sediment input at c. 11.7 ka. After isolation, the ecology and water levels in Lago Pato became sensitive to regional climate shifts. The shallow, stable, and highly anoxic environment that developed after c. 11.7 ka is associated with weaker (or poleward shifted) SWW at 51°S and was replaced at c. 10 ka by an increasingly productive shallow-littoral lake with a variable lake-level and periodic shifts in anoxic-oxic bottom water conditions and ratios of benthic-planktonic diatoms. A more open Nothofagus forest, ... |
format |
Dataset |
author |
Stephen J. Roberts Robert D. McCulloch Joseph F. Emmings Sarah J. Davies Wim Van Nieuwenhuyze Mieke Sterken Katrien Heirman Jeroen Van Wichelen Carolina Diaz Evelien Van de Vyver Alex Whittle Wim Vyverman Dominic A. Hodgson Elie Verleyen |
author_facet |
Stephen J. Roberts Robert D. McCulloch Joseph F. Emmings Sarah J. Davies Wim Van Nieuwenhuyze Mieke Sterken Katrien Heirman Jeroen Van Wichelen Carolina Diaz Evelien Van de Vyver Alex Whittle Wim Vyverman Dominic A. Hodgson Elie Verleyen |
author_sort |
Stephen J. Roberts |
title |
DataSheet1_Late Glacial and Holocene Palaeolake History of the Última Esperanza Region of Southern Patagonia.pdf |
title_short |
DataSheet1_Late Glacial and Holocene Palaeolake History of the Última Esperanza Region of Southern Patagonia.pdf |
title_full |
DataSheet1_Late Glacial and Holocene Palaeolake History of the Última Esperanza Region of Southern Patagonia.pdf |
title_fullStr |
DataSheet1_Late Glacial and Holocene Palaeolake History of the Última Esperanza Region of Southern Patagonia.pdf |
title_full_unstemmed |
DataSheet1_Late Glacial and Holocene Palaeolake History of the Última Esperanza Region of Southern Patagonia.pdf |
title_sort |
datasheet1_late glacial and holocene palaeolake history of the última esperanza region of southern patagonia.pdf |
publishDate |
2022 |
url |
https://doi.org/10.3389/feart.2022.813396.s001 https://figshare.com/articles/dataset/DataSheet1_Late_Glacial_and_Holocene_Palaeolake_History_of_the_ltima_Esperanza_Region_of_Southern_Patagonia_pdf/19573885 |
long_lat |
ENVELOPE(-56.983,-56.983,-63.400,-63.400) ENVELOPE(-147.533,-147.533,-86.767,-86.767) |
geographic |
Antarctic Patagonia Esperanza Paine |
geographic_facet |
Antarctic Patagonia Esperanza Paine |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
doi:10.3389/feart.2022.813396.s001 https://figshare.com/articles/dataset/DataSheet1_Late_Glacial_and_Holocene_Palaeolake_History_of_the_ltima_Esperanza_Region_of_Southern_Patagonia_pdf/19573885 |
op_rights |
CC BY 4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.3389/feart.2022.813396.s001 |
_version_ |
1766166252514967552 |