Late Quaternary environmental history of Taylor Valley, southern Victoria Land, Antarctica, reconstructed by a multidisciplinary study of lake sediments
In the unglaciated areas of Antarctica, lake sediments act as archives of the regional environmental and climatic history. In most cases, the records are restricted to the Holocene. Amongst the few exceptions are lakes in the McMurdo Dry Valleys, southern Victoria Land, which are known to have remai...
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ftdatacite:10.23689/fidgeo-239 2023-05-15T13:30:25+02:00 Late Quaternary environmental history of Taylor Valley, southern Victoria Land, Antarctica, reconstructed by a multidisciplinary study of lake sediments Ortlepp, Sabrina 2009 https://dx.doi.org/10.23689/fidgeo-239 https://e-docs.geo-leo.de/handle/11858/00-1735-0000-0001-3177-3 en eng Univ. Köln Text book Book 2009 ftdatacite https://doi.org/10.23689/fidgeo-239 2021-11-05T12:55:41Z In the unglaciated areas of Antarctica, lake sediments act as archives of the regional environmental and climatic history. In most cases, the records are restricted to the Holocene. Amongst the few exceptions are lakes in the McMurdo Dry Valleys, southern Victoria Land, which are known to have remained mostly ice-free during the Last Glacial Maximum. Within the scope of an U.S.-American-German expedition in austral summer 2002/2003, several sediment cores were recovered from the three major lakes in the Taylor Valley: lakes Fryxell, Hoare, and Bonney. In order to reconstruct the late Quaternary regional environmental and climate history, sedimentological, biogeochemical, mineralogical, and chronological investigations were conducted on the sediment sequences recovered from Lake Hoare (core Lz1020) and East Lake Bonney (core Lz1023) within the scope of this thesis. Sediment cores from Lake Hoare with a maximum length of 2.3 m mainly consist of coarse-grained material and penetrate back into the late Weichselian, when Taylor Valley was occupied by the large proglacial Lake Washburn. This lake was dammed by the advanced Ross Sea ice sheet at the valley outlet and was mainly fed by meltwater of the ice sheet. During the Pleistocene-Holocene transition, enhanced evaporation led to a significant lake level drop of Lake Washburn ... : thesis Text Antarc* Antarctica Ice Sheet McMurdo Dry Valleys Ross Sea Sea ice Victoria Land DataCite Metadata Store (German National Library of Science and Technology) Austral Bonney ENVELOPE(162.417,162.417,-77.717,-77.717) East Lake ENVELOPE(142.682,142.682,-66.995,-66.995) Fryxell ENVELOPE(163.183,163.183,-77.617,-77.617) Hoare ENVELOPE(162.850,162.850,-77.633,-77.633) Lake Bonney ENVELOPE(-25.588,-25.588,-80.361,-80.361) Lake Hoare ENVELOPE(162.850,162.850,-77.633,-77.633) McMurdo Dry Valleys Ross Sea Taylor Valley ENVELOPE(163.000,163.000,-77.617,-77.617) Victoria Land Washburn ENVELOPE(-86.133,-86.133,-77.617,-77.617) |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
description |
In the unglaciated areas of Antarctica, lake sediments act as archives of the regional environmental and climatic history. In most cases, the records are restricted to the Holocene. Amongst the few exceptions are lakes in the McMurdo Dry Valleys, southern Victoria Land, which are known to have remained mostly ice-free during the Last Glacial Maximum. Within the scope of an U.S.-American-German expedition in austral summer 2002/2003, several sediment cores were recovered from the three major lakes in the Taylor Valley: lakes Fryxell, Hoare, and Bonney. In order to reconstruct the late Quaternary regional environmental and climate history, sedimentological, biogeochemical, mineralogical, and chronological investigations were conducted on the sediment sequences recovered from Lake Hoare (core Lz1020) and East Lake Bonney (core Lz1023) within the scope of this thesis. Sediment cores from Lake Hoare with a maximum length of 2.3 m mainly consist of coarse-grained material and penetrate back into the late Weichselian, when Taylor Valley was occupied by the large proglacial Lake Washburn. This lake was dammed by the advanced Ross Sea ice sheet at the valley outlet and was mainly fed by meltwater of the ice sheet. During the Pleistocene-Holocene transition, enhanced evaporation led to a significant lake level drop of Lake Washburn ... : thesis |
format |
Text |
author |
Ortlepp, Sabrina |
spellingShingle |
Ortlepp, Sabrina Late Quaternary environmental history of Taylor Valley, southern Victoria Land, Antarctica, reconstructed by a multidisciplinary study of lake sediments |
author_facet |
Ortlepp, Sabrina |
author_sort |
Ortlepp, Sabrina |
title |
Late Quaternary environmental history of Taylor Valley, southern Victoria Land, Antarctica, reconstructed by a multidisciplinary study of lake sediments |
title_short |
Late Quaternary environmental history of Taylor Valley, southern Victoria Land, Antarctica, reconstructed by a multidisciplinary study of lake sediments |
title_full |
Late Quaternary environmental history of Taylor Valley, southern Victoria Land, Antarctica, reconstructed by a multidisciplinary study of lake sediments |
title_fullStr |
Late Quaternary environmental history of Taylor Valley, southern Victoria Land, Antarctica, reconstructed by a multidisciplinary study of lake sediments |
title_full_unstemmed |
Late Quaternary environmental history of Taylor Valley, southern Victoria Land, Antarctica, reconstructed by a multidisciplinary study of lake sediments |
title_sort |
late quaternary environmental history of taylor valley, southern victoria land, antarctica, reconstructed by a multidisciplinary study of lake sediments |
publisher |
Univ. Köln |
publishDate |
2009 |
url |
https://dx.doi.org/10.23689/fidgeo-239 https://e-docs.geo-leo.de/handle/11858/00-1735-0000-0001-3177-3 |
long_lat |
ENVELOPE(162.417,162.417,-77.717,-77.717) ENVELOPE(142.682,142.682,-66.995,-66.995) ENVELOPE(163.183,163.183,-77.617,-77.617) ENVELOPE(162.850,162.850,-77.633,-77.633) ENVELOPE(-25.588,-25.588,-80.361,-80.361) ENVELOPE(162.850,162.850,-77.633,-77.633) ENVELOPE(163.000,163.000,-77.617,-77.617) ENVELOPE(-86.133,-86.133,-77.617,-77.617) |
geographic |
Austral Bonney East Lake Fryxell Hoare Lake Bonney Lake Hoare McMurdo Dry Valleys Ross Sea Taylor Valley Victoria Land Washburn |
geographic_facet |
Austral Bonney East Lake Fryxell Hoare Lake Bonney Lake Hoare McMurdo Dry Valleys Ross Sea Taylor Valley Victoria Land Washburn |
genre |
Antarc* Antarctica Ice Sheet McMurdo Dry Valleys Ross Sea Sea ice Victoria Land |
genre_facet |
Antarc* Antarctica Ice Sheet McMurdo Dry Valleys Ross Sea Sea ice Victoria Land |
op_doi |
https://doi.org/10.23689/fidgeo-239 |
_version_ |
1766007968645513216 |