The Holocene deglaciation of the Byers Peninsula (Livingston Island, Antarctica) based on the dating of lake sedimentary records
The process of deglaciation in the Antarctic Peninsula region has large implications for the geomorphological and ecological dynamics of the ice-free environments. However, uncertainties still remain regarding the age of deglaciation in many coastal environments, as is the case in the South Shetland...
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Language: | English |
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Online Access: | http://hdl.handle.net/10261/130417 https://doi.org/10.1016/j.geomorph.2016.02.029 |
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ftcsic:oai:digital.csic.es:10261/130417 2024-02-11T09:57:35+01:00 The Holocene deglaciation of the Byers Peninsula (Livingston Island, Antarctica) based on the dating of lake sedimentary records Oliva, M. Antoniades, D. Giralt, Santiago Granados, I. Pla-Rabes, S. Toro, M. Liu, E. J. Sanjurjo Sánchez, Jorge Vieira, Gonçalo 2016-03 http://hdl.handle.net/10261/130417 https://doi.org/10.1016/j.geomorph.2016.02.029 en eng http://dx.doi.org/10.1016/j.geomorph.2016.02.029 Sí 0169-555X http://hdl.handle.net/10261/130417 doi:10.1016/j.geomorph.2016.02.029 1872-695X none Antarctica Byers Peninsula Deglaciation Lake sediments artículo http://purl.org/coar/resource_type/c_6501 2016 ftcsic https://doi.org/10.1016/j.geomorph.2016.02.029 2024-01-16T10:14:28Z The process of deglaciation in the Antarctic Peninsula region has large implications for the geomorphological and ecological dynamics of the ice-free environments. However, uncertainties still remain regarding the age of deglaciation in many coastal environments, as is the case in the South Shetland Islands. This study focuses on the Byers Peninsula, the largest ice-free area in this archipelago and the one with greatest biodiversity in Antarctica. A complete lacustrine sedimentary sequence was collected from five lakes distributed along a transect from the western coast to the Rotch Dome glacier front: Limnopolar, Chester, Escondido, Cerro Negro and Domo lakes. A multiple dating approach based on 14C, thermoluminescence and tephrochronology was applied to the cores in order to infer the Holocene environmental history and identify the deglaciation chronology in the Byers Peninsula. The onset of the deglaciation started during the Early Holocene in the western fringe of the Byers Peninsula according to the basal dating of Limnopolar Lake (ca. 8.3 cal. ky BP). Glacial retreat gradually exposed the highest parts of the Cerro Negro nunatak in the SE corner of Byers, where Cerro Negro Lake is located; this lake was glacier-free since at least 7.5 ky. During the Mid-Holocene the retreat of the Rotch Dome glacier cleared the central part of the Byers plateau of ice, and Escondido and Chester lakes formed at 6 cal. ky BP and 5.9 ky, respectively. The dating of the basal sediments of Domo Lake suggests that the deglaciation of the current ice-free easternmost part of the Byers Peninsula occurred before 1.8 cal. ky BP. The present research has been funded by the Portuguese Science Foundation through the research project HOLOANTAR (Holocene environmental change in the Maritime Antarctic. Interactions Between permafrost and the lacustrine environment) and the Portuguese Polar Program (PROPOLAR). We acknowledge the logistic support of the Brazilian Antarctic Program during field work. The first author is grateful to the ... Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Brazilian Antarctic Program Ice Livingston Island permafrost South Shetland Islands Digital.CSIC (Spanish National Research Council) Antarctic Antarctic Peninsula Byers ENVELOPE(-60.283,-60.283,-63.900,-63.900) Byers peninsula ENVELOPE(-61.066,-61.066,-62.633,-62.633) Cerro Negro ENVELOPE(-61.002,-61.002,-62.655,-62.655) Dome Glacier ENVELOPE(-94.068,-94.068,79.452,79.452) Limnopolar Lake ENVELOPE(-61.098,-61.098,-62.633,-62.633) Livingston Island ENVELOPE(-60.500,-60.500,-62.600,-62.600) Negro nunatak ENVELOPE(-62.556,-62.556,-64.635,-64.635) Rotch ENVELOPE(-60.883,-60.883,-62.633,-62.633) Rotch Dome ENVELOPE(-60.883,-60.883,-62.633,-62.633) South Shetland Islands The Antarctic Geomorphology 261 89 102 |
institution |
Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
English |
topic |
Antarctica Byers Peninsula Deglaciation Lake sediments |
spellingShingle |
Antarctica Byers Peninsula Deglaciation Lake sediments Oliva, M. Antoniades, D. Giralt, Santiago Granados, I. Pla-Rabes, S. Toro, M. Liu, E. J. Sanjurjo Sánchez, Jorge Vieira, Gonçalo The Holocene deglaciation of the Byers Peninsula (Livingston Island, Antarctica) based on the dating of lake sedimentary records |
topic_facet |
Antarctica Byers Peninsula Deglaciation Lake sediments |
description |
The process of deglaciation in the Antarctic Peninsula region has large implications for the geomorphological and ecological dynamics of the ice-free environments. However, uncertainties still remain regarding the age of deglaciation in many coastal environments, as is the case in the South Shetland Islands. This study focuses on the Byers Peninsula, the largest ice-free area in this archipelago and the one with greatest biodiversity in Antarctica. A complete lacustrine sedimentary sequence was collected from five lakes distributed along a transect from the western coast to the Rotch Dome glacier front: Limnopolar, Chester, Escondido, Cerro Negro and Domo lakes. A multiple dating approach based on 14C, thermoluminescence and tephrochronology was applied to the cores in order to infer the Holocene environmental history and identify the deglaciation chronology in the Byers Peninsula. The onset of the deglaciation started during the Early Holocene in the western fringe of the Byers Peninsula according to the basal dating of Limnopolar Lake (ca. 8.3 cal. ky BP). Glacial retreat gradually exposed the highest parts of the Cerro Negro nunatak in the SE corner of Byers, where Cerro Negro Lake is located; this lake was glacier-free since at least 7.5 ky. During the Mid-Holocene the retreat of the Rotch Dome glacier cleared the central part of the Byers plateau of ice, and Escondido and Chester lakes formed at 6 cal. ky BP and 5.9 ky, respectively. The dating of the basal sediments of Domo Lake suggests that the deglaciation of the current ice-free easternmost part of the Byers Peninsula occurred before 1.8 cal. ky BP. The present research has been funded by the Portuguese Science Foundation through the research project HOLOANTAR (Holocene environmental change in the Maritime Antarctic. Interactions Between permafrost and the lacustrine environment) and the Portuguese Polar Program (PROPOLAR). We acknowledge the logistic support of the Brazilian Antarctic Program during field work. The first author is grateful to the ... |
format |
Article in Journal/Newspaper |
author |
Oliva, M. Antoniades, D. Giralt, Santiago Granados, I. Pla-Rabes, S. Toro, M. Liu, E. J. Sanjurjo Sánchez, Jorge Vieira, Gonçalo |
author_facet |
Oliva, M. Antoniades, D. Giralt, Santiago Granados, I. Pla-Rabes, S. Toro, M. Liu, E. J. Sanjurjo Sánchez, Jorge Vieira, Gonçalo |
author_sort |
Oliva, M. |
title |
The Holocene deglaciation of the Byers Peninsula (Livingston Island, Antarctica) based on the dating of lake sedimentary records |
title_short |
The Holocene deglaciation of the Byers Peninsula (Livingston Island, Antarctica) based on the dating of lake sedimentary records |
title_full |
The Holocene deglaciation of the Byers Peninsula (Livingston Island, Antarctica) based on the dating of lake sedimentary records |
title_fullStr |
The Holocene deglaciation of the Byers Peninsula (Livingston Island, Antarctica) based on the dating of lake sedimentary records |
title_full_unstemmed |
The Holocene deglaciation of the Byers Peninsula (Livingston Island, Antarctica) based on the dating of lake sedimentary records |
title_sort |
holocene deglaciation of the byers peninsula (livingston island, antarctica) based on the dating of lake sedimentary records |
publishDate |
2016 |
url |
http://hdl.handle.net/10261/130417 https://doi.org/10.1016/j.geomorph.2016.02.029 |
long_lat |
ENVELOPE(-60.283,-60.283,-63.900,-63.900) ENVELOPE(-61.066,-61.066,-62.633,-62.633) ENVELOPE(-61.002,-61.002,-62.655,-62.655) ENVELOPE(-94.068,-94.068,79.452,79.452) ENVELOPE(-61.098,-61.098,-62.633,-62.633) ENVELOPE(-60.500,-60.500,-62.600,-62.600) ENVELOPE(-62.556,-62.556,-64.635,-64.635) ENVELOPE(-60.883,-60.883,-62.633,-62.633) ENVELOPE(-60.883,-60.883,-62.633,-62.633) |
geographic |
Antarctic Antarctic Peninsula Byers Byers peninsula Cerro Negro Dome Glacier Limnopolar Lake Livingston Island Negro nunatak Rotch Rotch Dome South Shetland Islands The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula Byers Byers peninsula Cerro Negro Dome Glacier Limnopolar Lake Livingston Island Negro nunatak Rotch Rotch Dome South Shetland Islands The Antarctic |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Brazilian Antarctic Program Ice Livingston Island permafrost South Shetland Islands |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Brazilian Antarctic Program Ice Livingston Island permafrost South Shetland Islands |
op_relation |
http://dx.doi.org/10.1016/j.geomorph.2016.02.029 Sí 0169-555X http://hdl.handle.net/10261/130417 doi:10.1016/j.geomorph.2016.02.029 1872-695X |
op_rights |
none |
op_doi |
https://doi.org/10.1016/j.geomorph.2016.02.029 |
container_title |
Geomorphology |
container_volume |
261 |
container_start_page |
89 |
op_container_end_page |
102 |
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1790593130560487424 |