A Holocene palaeoenviromental study of a sediment core from Ile de la Possession, Iles Crozet, sub-Antarctica
Abstract Ile de la Possession is one of the few islands in the southern Indian Ocean, making the island a valuable place to reconstruct past environmental and climatic changes. In this study a peat sediment core was analysed to reconstruct the changes that occurred before, during and after the erupt...
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crcambridgeupr:10.1017/s0954102011000277 2024-10-13T14:03:17+00:00 A Holocene palaeoenviromental study of a sediment core from Ile de la Possession, Iles Crozet, sub-Antarctica Ooms, Marijke van de Vijver, Bart Temmerman, Stijn Beyens, Louis 2011 http://dx.doi.org/10.1017/s0954102011000277 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102011000277 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Antarctic Science volume 23, issue 5, page 431-441 ISSN 0954-1020 1365-2079 journal-article 2011 crcambridgeupr https://doi.org/10.1017/s0954102011000277 2024-09-18T04:03:41Z Abstract Ile de la Possession is one of the few islands in the southern Indian Ocean, making the island a valuable place to reconstruct past environmental and climatic changes. In this study a peat sediment core was analysed to reconstruct the changes that occurred before, during and after the eruption of the Morne Rouge (10 000–5500 14 C yr bp ) volcano. In addition to sedimentological analyses, diatom communities were used to reconstruct humidity and altitude, based on existing transfer functions. Radiocarbon dating of a tephra layer showed that the Morne Rouge volcano erupted between 6700–6600 cal. yr bp , giving a much more precise time scale for this event. The eruption was preceded by a tsunami flooding, indicated by the high numbers of marine diatoms found immediately before the tephra layer. After the eruption pioneer diatom species recolonized the coring site. Evidence is presented of the late climatic optimum around 3050 cal. yr bp , preceded by a cooling event until 6600 cal. yr bp . Nutrient input from elephant seals and wandering albatrosses obscured the climate signal for the last 600 cal yr bp . Article in Journal/Newspaper Antarc* Antarctic Science Antarctica Elephant Seals Cambridge University Press Indian Antarctic Science 23 5 431 441 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
description |
Abstract Ile de la Possession is one of the few islands in the southern Indian Ocean, making the island a valuable place to reconstruct past environmental and climatic changes. In this study a peat sediment core was analysed to reconstruct the changes that occurred before, during and after the eruption of the Morne Rouge (10 000–5500 14 C yr bp ) volcano. In addition to sedimentological analyses, diatom communities were used to reconstruct humidity and altitude, based on existing transfer functions. Radiocarbon dating of a tephra layer showed that the Morne Rouge volcano erupted between 6700–6600 cal. yr bp , giving a much more precise time scale for this event. The eruption was preceded by a tsunami flooding, indicated by the high numbers of marine diatoms found immediately before the tephra layer. After the eruption pioneer diatom species recolonized the coring site. Evidence is presented of the late climatic optimum around 3050 cal. yr bp , preceded by a cooling event until 6600 cal. yr bp . Nutrient input from elephant seals and wandering albatrosses obscured the climate signal for the last 600 cal yr bp . |
format |
Article in Journal/Newspaper |
author |
Ooms, Marijke van de Vijver, Bart Temmerman, Stijn Beyens, Louis |
spellingShingle |
Ooms, Marijke van de Vijver, Bart Temmerman, Stijn Beyens, Louis A Holocene palaeoenviromental study of a sediment core from Ile de la Possession, Iles Crozet, sub-Antarctica |
author_facet |
Ooms, Marijke van de Vijver, Bart Temmerman, Stijn Beyens, Louis |
author_sort |
Ooms, Marijke |
title |
A Holocene palaeoenviromental study of a sediment core from Ile de la Possession, Iles Crozet, sub-Antarctica |
title_short |
A Holocene palaeoenviromental study of a sediment core from Ile de la Possession, Iles Crozet, sub-Antarctica |
title_full |
A Holocene palaeoenviromental study of a sediment core from Ile de la Possession, Iles Crozet, sub-Antarctica |
title_fullStr |
A Holocene palaeoenviromental study of a sediment core from Ile de la Possession, Iles Crozet, sub-Antarctica |
title_full_unstemmed |
A Holocene palaeoenviromental study of a sediment core from Ile de la Possession, Iles Crozet, sub-Antarctica |
title_sort |
holocene palaeoenviromental study of a sediment core from ile de la possession, iles crozet, sub-antarctica |
publisher |
Cambridge University Press (CUP) |
publishDate |
2011 |
url |
http://dx.doi.org/10.1017/s0954102011000277 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102011000277 |
geographic |
Indian |
geographic_facet |
Indian |
genre |
Antarc* Antarctic Science Antarctica Elephant Seals |
genre_facet |
Antarc* Antarctic Science Antarctica Elephant Seals |
op_source |
Antarctic Science volume 23, issue 5, page 431-441 ISSN 0954-1020 1365-2079 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0954102011000277 |
container_title |
Antarctic Science |
container_volume |
23 |
container_issue |
5 |
container_start_page |
431 |
op_container_end_page |
441 |
_version_ |
1812819712980025344 |