Geochemistry of last glacial sediments of Isla de los Estados, southeastern Tierra del Fuego, supplement to: Unkel, Ingmar; Björck, Svante; Wohlfarth, Barbara (2008): Deglacial environmental changes on Isla de los Estados (54.4°S), southeastern Tierra del Fuego. Quaternary Science Reviews, 27(15-16), 1541-1554
The island of Isla de los Estados is situated at 54.5°S, 64°W, east of Argentinian Tierra del Fuego, and is located in a sensitive geographic position in relation to the zonal circulation between Antarctica and South America. Its terrestrial records of the last deglaciation, recording atmospheric co...
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ftdatacite:10.1594/pangaea.802154 2023-05-15T14:05:24+02:00 Geochemistry of last glacial sediments of Isla de los Estados, southeastern Tierra del Fuego, supplement to: Unkel, Ingmar; Björck, Svante; Wohlfarth, Barbara (2008): Deglacial environmental changes on Isla de los Estados (54.4°S), southeastern Tierra del Fuego. Quaternary Science Reviews, 27(15-16), 1541-1554 Unkel, Ingmar Björck, Svante Wohlfarth, Barbara 2008 application/zip https://dx.doi.org/10.1594/pangaea.802154 https://doi.pangaea.de/10.1594/PANGAEA.802154 en eng PANGAEA - Data Publisher for Earth & Environmental Science https://dx.doi.org/10.1016/j.quascirev.2008.05.004 Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 CC-BY article Supplementary Collection of Datasets Collection 2008 ftdatacite https://doi.org/10.1594/pangaea.802154 https://doi.org/10.1016/j.quascirev.2008.05.004 2022-02-09T13:17:41Z The island of Isla de los Estados is situated at 54.5°S, 64°W, east of Argentinian Tierra del Fuego, and is located in a sensitive geographic position in relation to the zonal circulation between Antarctica and South America. Its terrestrial records of the last deglaciation, recording atmospheric conditions but within an oceanic setting, can help to clarify changes of regional circulation patterns, both atmospheric and marine. Here, we present geochemical analyses from 16-10 ka cal BP of a peat core from Lago Galvarne Bog at the northern coast of the island, and a lake sediment core from Laguna Cascada 3 km further south. The data comprise TC, TN, loss on ignition analyses and continuous XRF scanning on both cores as well as age-depth modeling based on AMS-14C dating. Deglaciation and onset of peat formation in the coastal areas began before 16 ka cal BP followed by a rapid glacial retreat and the start of lacustrine sedimentation further inland. Data suggest initially windy conditions with permafrost succeeded by gradually warmer and wetter conditions until ca 14.5 ka cal BP. The warming trend slows down until ca 13.5 ka cal BP, followed by arid conditions culminating around 12.8 ka cal BP. Our data suggest fairly warm conditions and the establishment of denser peat and forest vegetation ca 10.6 ka cal BP, contemporaneous with the onset of the Antarctic thermal optimum. This indicates large-scale shifts in the placement of zonal flow and the Westerlies at the beginning of the Holocene. Article in Journal/Newspaper Antarc* Antarctic Antarctica permafrost Tierra del Fuego DataCite Metadata Store (German National Library of Science and Technology) Antarctic The Antarctic |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
description |
The island of Isla de los Estados is situated at 54.5°S, 64°W, east of Argentinian Tierra del Fuego, and is located in a sensitive geographic position in relation to the zonal circulation between Antarctica and South America. Its terrestrial records of the last deglaciation, recording atmospheric conditions but within an oceanic setting, can help to clarify changes of regional circulation patterns, both atmospheric and marine. Here, we present geochemical analyses from 16-10 ka cal BP of a peat core from Lago Galvarne Bog at the northern coast of the island, and a lake sediment core from Laguna Cascada 3 km further south. The data comprise TC, TN, loss on ignition analyses and continuous XRF scanning on both cores as well as age-depth modeling based on AMS-14C dating. Deglaciation and onset of peat formation in the coastal areas began before 16 ka cal BP followed by a rapid glacial retreat and the start of lacustrine sedimentation further inland. Data suggest initially windy conditions with permafrost succeeded by gradually warmer and wetter conditions until ca 14.5 ka cal BP. The warming trend slows down until ca 13.5 ka cal BP, followed by arid conditions culminating around 12.8 ka cal BP. Our data suggest fairly warm conditions and the establishment of denser peat and forest vegetation ca 10.6 ka cal BP, contemporaneous with the onset of the Antarctic thermal optimum. This indicates large-scale shifts in the placement of zonal flow and the Westerlies at the beginning of the Holocene. |
format |
Article in Journal/Newspaper |
author |
Unkel, Ingmar Björck, Svante Wohlfarth, Barbara |
spellingShingle |
Unkel, Ingmar Björck, Svante Wohlfarth, Barbara Geochemistry of last glacial sediments of Isla de los Estados, southeastern Tierra del Fuego, supplement to: Unkel, Ingmar; Björck, Svante; Wohlfarth, Barbara (2008): Deglacial environmental changes on Isla de los Estados (54.4°S), southeastern Tierra del Fuego. Quaternary Science Reviews, 27(15-16), 1541-1554 |
author_facet |
Unkel, Ingmar Björck, Svante Wohlfarth, Barbara |
author_sort |
Unkel, Ingmar |
title |
Geochemistry of last glacial sediments of Isla de los Estados, southeastern Tierra del Fuego, supplement to: Unkel, Ingmar; Björck, Svante; Wohlfarth, Barbara (2008): Deglacial environmental changes on Isla de los Estados (54.4°S), southeastern Tierra del Fuego. Quaternary Science Reviews, 27(15-16), 1541-1554 |
title_short |
Geochemistry of last glacial sediments of Isla de los Estados, southeastern Tierra del Fuego, supplement to: Unkel, Ingmar; Björck, Svante; Wohlfarth, Barbara (2008): Deglacial environmental changes on Isla de los Estados (54.4°S), southeastern Tierra del Fuego. Quaternary Science Reviews, 27(15-16), 1541-1554 |
title_full |
Geochemistry of last glacial sediments of Isla de los Estados, southeastern Tierra del Fuego, supplement to: Unkel, Ingmar; Björck, Svante; Wohlfarth, Barbara (2008): Deglacial environmental changes on Isla de los Estados (54.4°S), southeastern Tierra del Fuego. Quaternary Science Reviews, 27(15-16), 1541-1554 |
title_fullStr |
Geochemistry of last glacial sediments of Isla de los Estados, southeastern Tierra del Fuego, supplement to: Unkel, Ingmar; Björck, Svante; Wohlfarth, Barbara (2008): Deglacial environmental changes on Isla de los Estados (54.4°S), southeastern Tierra del Fuego. Quaternary Science Reviews, 27(15-16), 1541-1554 |
title_full_unstemmed |
Geochemistry of last glacial sediments of Isla de los Estados, southeastern Tierra del Fuego, supplement to: Unkel, Ingmar; Björck, Svante; Wohlfarth, Barbara (2008): Deglacial environmental changes on Isla de los Estados (54.4°S), southeastern Tierra del Fuego. Quaternary Science Reviews, 27(15-16), 1541-1554 |
title_sort |
geochemistry of last glacial sediments of isla de los estados, southeastern tierra del fuego, supplement to: unkel, ingmar; björck, svante; wohlfarth, barbara (2008): deglacial environmental changes on isla de los estados (54.4°s), southeastern tierra del fuego. quaternary science reviews, 27(15-16), 1541-1554 |
publisher |
PANGAEA - Data Publisher for Earth & Environmental Science |
publishDate |
2008 |
url |
https://dx.doi.org/10.1594/pangaea.802154 https://doi.pangaea.de/10.1594/PANGAEA.802154 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Antarctica permafrost Tierra del Fuego |
genre_facet |
Antarc* Antarctic Antarctica permafrost Tierra del Fuego |
op_relation |
https://dx.doi.org/10.1016/j.quascirev.2008.05.004 |
op_rights |
Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/pangaea.802154 https://doi.org/10.1016/j.quascirev.2008.05.004 |
_version_ |
1766277284989239296 |