Relative paleoenvironmental adjustments following deglaciation of the Byers Peninsula (Livingston Island, Antarctica)
In the present context of fast warming in the Antarctic Peninsula (AP), understanding past and recent environmental dynamics is crucial to better assess future environmental responses in this region. Very detailed geomorphological maps can help to interpret the interaction between glacial, periglaci...
Published in: | Arctic, Antarctic, and Alpine Research |
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Online Access: | http://hdl.handle.net/10451/35986 https://doi.org/10.1657/AAAR0015-014 |
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ftunivlisboa:oai:repositorio.ul.pt:10451/35986 2023-05-15T13:37:33+02:00 Relative paleoenvironmental adjustments following deglaciation of the Byers Peninsula (Livingston Island, Antarctica) Ruiz-Fernández, Jesús Oliva, Marc 2018-12-18T12:25:28Z http://hdl.handle.net/10451/35986 https://doi.org/10.1657/AAAR0015-014 eng eng Taylor & Francis https://www.tandfonline.com/doi/full/10.1657/AAAR0015-014 Ruiz-Fernandez, J., Oliva, M. (2016). Relative paleoenvironmental adjustments following deglaciation of the Byers Peninsula (Livingston Island, Antarctica). Arctic, Antarctic, and Alpine Research, 48(2), 345–359. https://doi.org/10.1657/AAAR0015-014 1523-0430 1938-4246 http://hdl.handle.net/10451/35986 doi:10.1657/AAAR0015-014 openAccess http://creativecommons.org/licenses/by/4.0/ CC-BY Paleoenvironmental adjustments deglaciation Byers Peninsula Livingston Island Antarctica article 2018 ftunivlisboa https://doi.org/10.1657/AAAR0015-014 2022-05-25T18:39:04Z In the present context of fast warming in the Antarctic Peninsula (AP), understanding past and recent environmental dynamics is crucial to better assess future environmental responses in this region. Very detailed geomorphological maps can help to interpret the interaction between glacial, periglacial, and paraglacial systems. The Holocene environmental sequence on Byers Peninsula, an ice-free area in the westernmost part of Livingston Island (Maritime Antarctica), is still poorly understood. This paper focuses on the geomorphology of the Cerro Negro, a volcanic plug located on the southeast fringe of this peninsula. The distribution of landforms and deposits generated by different geomorphological processes provides insights into the Holocene environmental dynamics on Byers Peninsula. During the fieldwork campaign in January 2014, an accurate geomorphological map of Cerro Negro and its surroundings was generated. Four geomorphological environments were identified: hill, north slope, southern escarpment, and marine terraces and present-day beach. Periglacial landforms are abundant, especially patterned ground features (blockstreams, sorted stone circles, stone stripes). All these cryoturbation landforms, except blockstreams, are active under present-day climate conditions. In addition to a sequence of Holocene marine terraces and slope deposits, such as talus cones and rockfalls, there is a glacial moraine adjoining the northern slope of the hill. From the morphostratigraphic correlation between the active and inactive landforms, we infer three main phases describing the paleoenvironmental evolution in this area: (1) maximum glacial expansion; (2) Holocene glacial retreat, lake formation, and intense periglacial dynamics; and (3) deglaciation of the Byers Peninsula and widespread periglacial processes. The Cerro Negro has been a nunatak for most of the Holocene; the lake located near the summit of this hill appeared when most of the Byers Peninsula was still covered by glacial ice. This study constitutes an ... Article in Journal/Newspaper Antarc* Antarctic Antarctic and Alpine Research Antarctic Peninsula Antarctica Arctic Livingston Island Universidade de Lisboa: repositório.UL 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) Livingston Island ENVELOPE(-60.500,-60.500,-62.600,-62.600) The Antarctic Arctic, Antarctic, and Alpine Research 48 2 345 359 |
institution |
Open Polar |
collection |
Universidade de Lisboa: repositório.UL |
op_collection_id |
ftunivlisboa |
language |
English |
topic |
Paleoenvironmental adjustments deglaciation Byers Peninsula Livingston Island Antarctica |
spellingShingle |
Paleoenvironmental adjustments deglaciation Byers Peninsula Livingston Island Antarctica Ruiz-Fernández, Jesús Oliva, Marc Relative paleoenvironmental adjustments following deglaciation of the Byers Peninsula (Livingston Island, Antarctica) |
topic_facet |
Paleoenvironmental adjustments deglaciation Byers Peninsula Livingston Island Antarctica |
description |
In the present context of fast warming in the Antarctic Peninsula (AP), understanding past and recent environmental dynamics is crucial to better assess future environmental responses in this region. Very detailed geomorphological maps can help to interpret the interaction between glacial, periglacial, and paraglacial systems. The Holocene environmental sequence on Byers Peninsula, an ice-free area in the westernmost part of Livingston Island (Maritime Antarctica), is still poorly understood. This paper focuses on the geomorphology of the Cerro Negro, a volcanic plug located on the southeast fringe of this peninsula. The distribution of landforms and deposits generated by different geomorphological processes provides insights into the Holocene environmental dynamics on Byers Peninsula. During the fieldwork campaign in January 2014, an accurate geomorphological map of Cerro Negro and its surroundings was generated. Four geomorphological environments were identified: hill, north slope, southern escarpment, and marine terraces and present-day beach. Periglacial landforms are abundant, especially patterned ground features (blockstreams, sorted stone circles, stone stripes). All these cryoturbation landforms, except blockstreams, are active under present-day climate conditions. In addition to a sequence of Holocene marine terraces and slope deposits, such as talus cones and rockfalls, there is a glacial moraine adjoining the northern slope of the hill. From the morphostratigraphic correlation between the active and inactive landforms, we infer three main phases describing the paleoenvironmental evolution in this area: (1) maximum glacial expansion; (2) Holocene glacial retreat, lake formation, and intense periglacial dynamics; and (3) deglaciation of the Byers Peninsula and widespread periglacial processes. The Cerro Negro has been a nunatak for most of the Holocene; the lake located near the summit of this hill appeared when most of the Byers Peninsula was still covered by glacial ice. This study constitutes an ... |
format |
Article in Journal/Newspaper |
author |
Ruiz-Fernández, Jesús Oliva, Marc |
author_facet |
Ruiz-Fernández, Jesús Oliva, Marc |
author_sort |
Ruiz-Fernández, Jesús |
title |
Relative paleoenvironmental adjustments following deglaciation of the Byers Peninsula (Livingston Island, Antarctica) |
title_short |
Relative paleoenvironmental adjustments following deglaciation of the Byers Peninsula (Livingston Island, Antarctica) |
title_full |
Relative paleoenvironmental adjustments following deglaciation of the Byers Peninsula (Livingston Island, Antarctica) |
title_fullStr |
Relative paleoenvironmental adjustments following deglaciation of the Byers Peninsula (Livingston Island, Antarctica) |
title_full_unstemmed |
Relative paleoenvironmental adjustments following deglaciation of the Byers Peninsula (Livingston Island, Antarctica) |
title_sort |
relative paleoenvironmental adjustments following deglaciation of the byers peninsula (livingston island, antarctica) |
publisher |
Taylor & Francis |
publishDate |
2018 |
url |
http://hdl.handle.net/10451/35986 https://doi.org/10.1657/AAAR0015-014 |
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(-60.500,-60.500,-62.600,-62.600) |
geographic |
Antarctic Antarctic Peninsula Byers Byers peninsula Cerro Negro Livingston Island The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula Byers Byers peninsula Cerro Negro Livingston Island The Antarctic |
genre |
Antarc* Antarctic Antarctic and Alpine Research Antarctic Peninsula Antarctica Arctic Livingston Island |
genre_facet |
Antarc* Antarctic Antarctic and Alpine Research Antarctic Peninsula Antarctica Arctic Livingston Island |
op_relation |
https://www.tandfonline.com/doi/full/10.1657/AAAR0015-014 Ruiz-Fernandez, J., Oliva, M. (2016). Relative paleoenvironmental adjustments following deglaciation of the Byers Peninsula (Livingston Island, Antarctica). Arctic, Antarctic, and Alpine Research, 48(2), 345–359. https://doi.org/10.1657/AAAR0015-014 1523-0430 1938-4246 http://hdl.handle.net/10451/35986 doi:10.1657/AAAR0015-014 |
op_rights |
openAccess http://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1657/AAAR0015-014 |
container_title |
Arctic, Antarctic, and Alpine Research |
container_volume |
48 |
container_issue |
2 |
container_start_page |
345 |
op_container_end_page |
359 |
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1766093830771179520 |