Limited Pliocene/Pleistocene glaciation in Deep Freeze Range, northern Victoria Land, Antarctica, derived from in situ cosmogenic nuclides
The question of how stable the climate in Antarctica has been during the last few million years compared to the rest of the planet is still controversial. This study attempts to add new information to the discussion by reconstructing the timing and spatial extent of glacial advances in northern Vict...
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ftopenaccessrep:oai:zenodo.org:165914 2024-05-12T07:53:55+00:00 Limited Pliocene/Pleistocene glaciation in Deep Freeze Range, northern Victoria Land, Antarctica, derived from in situ cosmogenic nuclides OBERHOLZER, PETER BARONI, CARLO SCHAEFER, JOERG M. OROMBELLI, GIUSEPPE OCHS, SUSAN IVY KUBIK, PETER W. BAUR, HEINRICH WIELER, RAINER 2003-12-02 https://www.openaccessrepository.it/record/165914 https://doi.org/10.1017/s0954102003001603 eng eng url:https://www.openaccessrepository.it/communities/itmirror https://www.openaccessrepository.it/record/165914 doi:10.1017/s0954102003001603 info:eu-repo/semantics/openAccess Geology Ecology Evolution Behavior and Systematics Oceanography info:eu-repo/semantics/article publication-article 2003 ftopenaccessrep https://doi.org/10.1017/s0954102003001603 2024-04-17T15:06:16Z The question of how stable the climate in Antarctica has been during the last few million years compared to the rest of the planet is still controversial. This study attempts to add new information to the discussion by reconstructing the timing and spatial extent of glacial advances in northern Victoria Land over tens of thousands to millions of years. In Terra Nova Bay region, surface exposure ages and erosion rates of glacially rounded bedrock and glacial erratics have been determined using the cosmogenic nuclides 3He, 10Be and 21Ne. Three morphological units have been analysed. They yield minimum ages of 11 to 34 ka, 309 ka, and 2.6 Ma, respectively. Erosion rates were as low as 20 cm Ma−1 since middle Pliocene time. Taking erosion into account, the oldest surface is 5.3 Ma old. Pleistocene glacier advances had considerable extent, reaching up to 780 m above modern ice levels, but have been restricted to the valleys since at least mid-Pliocene. The existence of landscapes of mid-Pliocene age in northern Victoria Land implies that the climatic stability of the McMurdo Dry Valleys is not unique within the Transantarctic Mountains, but rather the expression of a constantly cold and hyperarid climate regime in entire Victoria Land. Article in Journal/Newspaper Antarc* Antarctica McMurdo Dry Valleys Victoria Land Istituto Nazionale di Fisica Nucleare (INFN): Open Access Repository Deep Freeze Range ENVELOPE(163.750,163.750,-74.250,-74.250) McMurdo Dry Valleys Terra Nova Bay Transantarctic Mountains Victoria Land Antarctic Science 15 4 493 502 |
institution |
Open Polar |
collection |
Istituto Nazionale di Fisica Nucleare (INFN): Open Access Repository |
op_collection_id |
ftopenaccessrep |
language |
English |
topic |
Geology Ecology Evolution Behavior and Systematics Oceanography |
spellingShingle |
Geology Ecology Evolution Behavior and Systematics Oceanography OBERHOLZER, PETER BARONI, CARLO SCHAEFER, JOERG M. OROMBELLI, GIUSEPPE OCHS, SUSAN IVY KUBIK, PETER W. BAUR, HEINRICH WIELER, RAINER Limited Pliocene/Pleistocene glaciation in Deep Freeze Range, northern Victoria Land, Antarctica, derived from in situ cosmogenic nuclides |
topic_facet |
Geology Ecology Evolution Behavior and Systematics Oceanography |
description |
The question of how stable the climate in Antarctica has been during the last few million years compared to the rest of the planet is still controversial. This study attempts to add new information to the discussion by reconstructing the timing and spatial extent of glacial advances in northern Victoria Land over tens of thousands to millions of years. In Terra Nova Bay region, surface exposure ages and erosion rates of glacially rounded bedrock and glacial erratics have been determined using the cosmogenic nuclides 3He, 10Be and 21Ne. Three morphological units have been analysed. They yield minimum ages of 11 to 34 ka, 309 ka, and 2.6 Ma, respectively. Erosion rates were as low as 20 cm Ma−1 since middle Pliocene time. Taking erosion into account, the oldest surface is 5.3 Ma old. Pleistocene glacier advances had considerable extent, reaching up to 780 m above modern ice levels, but have been restricted to the valleys since at least mid-Pliocene. The existence of landscapes of mid-Pliocene age in northern Victoria Land implies that the climatic stability of the McMurdo Dry Valleys is not unique within the Transantarctic Mountains, but rather the expression of a constantly cold and hyperarid climate regime in entire Victoria Land. |
format |
Article in Journal/Newspaper |
author |
OBERHOLZER, PETER BARONI, CARLO SCHAEFER, JOERG M. OROMBELLI, GIUSEPPE OCHS, SUSAN IVY KUBIK, PETER W. BAUR, HEINRICH WIELER, RAINER |
author_facet |
OBERHOLZER, PETER BARONI, CARLO SCHAEFER, JOERG M. OROMBELLI, GIUSEPPE OCHS, SUSAN IVY KUBIK, PETER W. BAUR, HEINRICH WIELER, RAINER |
author_sort |
OBERHOLZER, PETER |
title |
Limited Pliocene/Pleistocene glaciation in Deep Freeze Range, northern Victoria Land, Antarctica, derived from in situ cosmogenic nuclides |
title_short |
Limited Pliocene/Pleistocene glaciation in Deep Freeze Range, northern Victoria Land, Antarctica, derived from in situ cosmogenic nuclides |
title_full |
Limited Pliocene/Pleistocene glaciation in Deep Freeze Range, northern Victoria Land, Antarctica, derived from in situ cosmogenic nuclides |
title_fullStr |
Limited Pliocene/Pleistocene glaciation in Deep Freeze Range, northern Victoria Land, Antarctica, derived from in situ cosmogenic nuclides |
title_full_unstemmed |
Limited Pliocene/Pleistocene glaciation in Deep Freeze Range, northern Victoria Land, Antarctica, derived from in situ cosmogenic nuclides |
title_sort |
limited pliocene/pleistocene glaciation in deep freeze range, northern victoria land, antarctica, derived from in situ cosmogenic nuclides |
publishDate |
2003 |
url |
https://www.openaccessrepository.it/record/165914 https://doi.org/10.1017/s0954102003001603 |
long_lat |
ENVELOPE(163.750,163.750,-74.250,-74.250) |
geographic |
Deep Freeze Range McMurdo Dry Valleys Terra Nova Bay Transantarctic Mountains Victoria Land |
geographic_facet |
Deep Freeze Range McMurdo Dry Valleys Terra Nova Bay Transantarctic Mountains Victoria Land |
genre |
Antarc* Antarctica McMurdo Dry Valleys Victoria Land |
genre_facet |
Antarc* Antarctica McMurdo Dry Valleys Victoria Land |
op_relation |
url:https://www.openaccessrepository.it/communities/itmirror https://www.openaccessrepository.it/record/165914 doi:10.1017/s0954102003001603 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1017/s0954102003001603 |
container_title |
Antarctic Science |
container_volume |
15 |
container_issue |
4 |
container_start_page |
493 |
op_container_end_page |
502 |
_version_ |
1798845571352494080 |