Palaeolimnological evidence for marked Holocene environmental changes on Signy Island, Antarctica
Lake-sediment cores from Heywood and Sombre Lakes on Signy Island (South Orkney Islands), Antarctica, have yielded a conformable radiocarbon chronology for the Holocene and a high-resolution record of environmental change. The lakes share a common climate and geology but have distinct catchments. Th...
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Online Access: | http://dx.doi.org/10.1191/095968300673046662 https://journals.sagepub.com/doi/pdf/10.1191/095968300673046662 |
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crsagepubl:10.1191/095968300673046662 2024-10-20T14:04:49+00:00 Palaeolimnological evidence for marked Holocene environmental changes on Signy Island, Antarctica Jones, V. J. Hodgson, D. A. Chepstow-Lusty, A. 2000 http://dx.doi.org/10.1191/095968300673046662 https://journals.sagepub.com/doi/pdf/10.1191/095968300673046662 en eng SAGE Publications https://journals.sagepub.com/page/policies/text-and-data-mining-license The Holocene volume 10, issue 1, page 43-60 ISSN 0959-6836 1477-0911 journal-article 2000 crsagepubl https://doi.org/10.1191/095968300673046662 2024-09-24T04:12:59Z Lake-sediment cores from Heywood and Sombre Lakes on Signy Island (South Orkney Islands), Antarctica, have yielded a conformable radiocarbon chronology for the Holocene and a high-resolution record of environmental change. The lakes share a common climate and geology but have distinct catchments. This provides an opportunity for using lake sediments to differentiate between local, within lake/catchment, events and those at a regional scale. Analyses of various biological and physical remains from the lakes suggest that both catchments have undergone considerable changes during the last 5700 years. Macrofossils (moss and crustacean remains) are more abundant in the late Holocene, being associated with a period of high sediment accumulation, which is related to diatom evidence for more nutrient-rich conditions at the sites. This is interpreted as a response to a Holocene‘climate optimum' at c. 3800–1300 14 C yr BP. The record is consistent with other lake, ice and ocean core studies, although the climate optimum appears to have persisted for a longer period at Signy Island. Article in Journal/Newspaper Antarc* Antarctica Signy Island South Orkney Islands SAGE Publications Heywood ENVELOPE(-59.683,-59.683,-62.317,-62.317) Signy Island ENVELOPE(-45.595,-45.595,-60.708,-60.708) South Orkney Islands ENVELOPE(-45.500,-45.500,-60.583,-60.583) The Holocene 10 1 43 60 |
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Open Polar |
collection |
SAGE Publications |
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crsagepubl |
language |
English |
description |
Lake-sediment cores from Heywood and Sombre Lakes on Signy Island (South Orkney Islands), Antarctica, have yielded a conformable radiocarbon chronology for the Holocene and a high-resolution record of environmental change. The lakes share a common climate and geology but have distinct catchments. This provides an opportunity for using lake sediments to differentiate between local, within lake/catchment, events and those at a regional scale. Analyses of various biological and physical remains from the lakes suggest that both catchments have undergone considerable changes during the last 5700 years. Macrofossils (moss and crustacean remains) are more abundant in the late Holocene, being associated with a period of high sediment accumulation, which is related to diatom evidence for more nutrient-rich conditions at the sites. This is interpreted as a response to a Holocene‘climate optimum' at c. 3800–1300 14 C yr BP. The record is consistent with other lake, ice and ocean core studies, although the climate optimum appears to have persisted for a longer period at Signy Island. |
format |
Article in Journal/Newspaper |
author |
Jones, V. J. Hodgson, D. A. Chepstow-Lusty, A. |
spellingShingle |
Jones, V. J. Hodgson, D. A. Chepstow-Lusty, A. Palaeolimnological evidence for marked Holocene environmental changes on Signy Island, Antarctica |
author_facet |
Jones, V. J. Hodgson, D. A. Chepstow-Lusty, A. |
author_sort |
Jones, V. J. |
title |
Palaeolimnological evidence for marked Holocene environmental changes on Signy Island, Antarctica |
title_short |
Palaeolimnological evidence for marked Holocene environmental changes on Signy Island, Antarctica |
title_full |
Palaeolimnological evidence for marked Holocene environmental changes on Signy Island, Antarctica |
title_fullStr |
Palaeolimnological evidence for marked Holocene environmental changes on Signy Island, Antarctica |
title_full_unstemmed |
Palaeolimnological evidence for marked Holocene environmental changes on Signy Island, Antarctica |
title_sort |
palaeolimnological evidence for marked holocene environmental changes on signy island, antarctica |
publisher |
SAGE Publications |
publishDate |
2000 |
url |
http://dx.doi.org/10.1191/095968300673046662 https://journals.sagepub.com/doi/pdf/10.1191/095968300673046662 |
long_lat |
ENVELOPE(-59.683,-59.683,-62.317,-62.317) ENVELOPE(-45.595,-45.595,-60.708,-60.708) ENVELOPE(-45.500,-45.500,-60.583,-60.583) |
geographic |
Heywood Signy Island South Orkney Islands |
geographic_facet |
Heywood Signy Island South Orkney Islands |
genre |
Antarc* Antarctica Signy Island South Orkney Islands |
genre_facet |
Antarc* Antarctica Signy Island South Orkney Islands |
op_source |
The Holocene volume 10, issue 1, page 43-60 ISSN 0959-6836 1477-0911 |
op_rights |
https://journals.sagepub.com/page/policies/text-and-data-mining-license |
op_doi |
https://doi.org/10.1191/095968300673046662 |
container_title |
The Holocene |
container_volume |
10 |
container_issue |
1 |
container_start_page |
43 |
op_container_end_page |
60 |
_version_ |
1813453630567612416 |