The impact of the Neoglacial and other environmental changes on the raised beaches of Joinville Island, Antarctica
Abstract In order to reconstruct past environmental conditions along the north-eastern Antarctic Peninsula, we documented changes in grain size, grain roundness, onlap as seen in ground-penetrating radar reflection profiles and ice-rafted debris on a set of 36 raised beaches developed over the last...
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Cambridge University Press (CUP)
2023
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Online Access: | http://dx.doi.org/10.1017/s0954102023000275 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102023000275 |
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crcambridgeupr:10.1017/s0954102023000275 2024-10-06T13:42:16+00:00 The impact of the Neoglacial and other environmental changes on the raised beaches of Joinville Island, Antarctica Theilen, Brittany M. Simms, Alexander R. DeWitt, Regina Zurbuchen, Julie Garcia, Christopher Gernant, Cameron National Science Foundation 2023 http://dx.doi.org/10.1017/s0954102023000275 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102023000275 en eng Cambridge University Press (CUP) http://creativecommons.org/licenses/by/4.0/ Antarctic Science volume 35, issue 6, page 418-437 ISSN 0954-1020 1365-2079 journal-article 2023 crcambridgeupr https://doi.org/10.1017/s0954102023000275 2024-09-11T04:05:15Z Abstract In order to reconstruct past environmental conditions along the north-eastern Antarctic Peninsula, we documented changes in grain size, grain roundness, onlap as seen in ground-penetrating radar reflection profiles and ice-rafted debris on a set of 36 raised beaches developed over the last ~7.7 ± 0.9 ka on Joinville Island. The most pronounced changes in beach character occur at ~2.7–3.0 ka. At this time, there appears to have been a reintroduction of less rounded material, the development of stratification within individual beach ridges, an introduction of seaweed and limpets to the beach deposits, a change in clast provenance (although slightly earlier than the change in cobble roundness) and a shallowing of the overall beach plain slope. Prolonged cooling associated with the Neoglacial period may have contributed to these changes, as the readvance of glaciers could have changed the provenance of the beach deposits and introduced more material, leading to the change in roundness of the beach cobbles and the overall slope of the beach plain. This study suggests that late Holocene environmental change left a measurable impact on the coastal zone of Antarctica. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctic Science Antarctica Joinville Island Cambridge University Press Antarctic Antarctic Peninsula Joinville ENVELOPE(-55.867,-55.867,-63.250,-63.250) Joinville Island ENVELOPE(-55.667,-55.667,-63.350,-63.350) Antarctic Science 35 6 418 437 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
description |
Abstract In order to reconstruct past environmental conditions along the north-eastern Antarctic Peninsula, we documented changes in grain size, grain roundness, onlap as seen in ground-penetrating radar reflection profiles and ice-rafted debris on a set of 36 raised beaches developed over the last ~7.7 ± 0.9 ka on Joinville Island. The most pronounced changes in beach character occur at ~2.7–3.0 ka. At this time, there appears to have been a reintroduction of less rounded material, the development of stratification within individual beach ridges, an introduction of seaweed and limpets to the beach deposits, a change in clast provenance (although slightly earlier than the change in cobble roundness) and a shallowing of the overall beach plain slope. Prolonged cooling associated with the Neoglacial period may have contributed to these changes, as the readvance of glaciers could have changed the provenance of the beach deposits and introduced more material, leading to the change in roundness of the beach cobbles and the overall slope of the beach plain. This study suggests that late Holocene environmental change left a measurable impact on the coastal zone of Antarctica. |
author2 |
National Science Foundation |
format |
Article in Journal/Newspaper |
author |
Theilen, Brittany M. Simms, Alexander R. DeWitt, Regina Zurbuchen, Julie Garcia, Christopher Gernant, Cameron |
spellingShingle |
Theilen, Brittany M. Simms, Alexander R. DeWitt, Regina Zurbuchen, Julie Garcia, Christopher Gernant, Cameron The impact of the Neoglacial and other environmental changes on the raised beaches of Joinville Island, Antarctica |
author_facet |
Theilen, Brittany M. Simms, Alexander R. DeWitt, Regina Zurbuchen, Julie Garcia, Christopher Gernant, Cameron |
author_sort |
Theilen, Brittany M. |
title |
The impact of the Neoglacial and other environmental changes on the raised beaches of Joinville Island, Antarctica |
title_short |
The impact of the Neoglacial and other environmental changes on the raised beaches of Joinville Island, Antarctica |
title_full |
The impact of the Neoglacial and other environmental changes on the raised beaches of Joinville Island, Antarctica |
title_fullStr |
The impact of the Neoglacial and other environmental changes on the raised beaches of Joinville Island, Antarctica |
title_full_unstemmed |
The impact of the Neoglacial and other environmental changes on the raised beaches of Joinville Island, Antarctica |
title_sort |
impact of the neoglacial and other environmental changes on the raised beaches of joinville island, antarctica |
publisher |
Cambridge University Press (CUP) |
publishDate |
2023 |
url |
http://dx.doi.org/10.1017/s0954102023000275 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102023000275 |
long_lat |
ENVELOPE(-55.867,-55.867,-63.250,-63.250) ENVELOPE(-55.667,-55.667,-63.350,-63.350) |
geographic |
Antarctic Antarctic Peninsula Joinville Joinville Island |
geographic_facet |
Antarctic Antarctic Peninsula Joinville Joinville Island |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctic Science Antarctica Joinville Island |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctic Science Antarctica Joinville Island |
op_source |
Antarctic Science volume 35, issue 6, page 418-437 ISSN 0954-1020 1365-2079 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1017/s0954102023000275 |
container_title |
Antarctic Science |
container_volume |
35 |
container_issue |
6 |
container_start_page |
418 |
op_container_end_page |
437 |
_version_ |
1812174704391225344 |