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://nora.nerc.ac.uk/id/eprint/20609/ https://doi.org/10.1191/095968300673046662 |
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ftnerc:oai:nora.nerc.ac.uk:20609 2023-05-15T13:45:12+02:00 Palaeolimnological evidence for marked Holocene environmental changes on Signy Island, Antarctica Jones, V.J. Hodgson, D.A. Chepstow-Lusty, A. 2000 http://nora.nerc.ac.uk/id/eprint/20609/ https://doi.org/10.1191/095968300673046662 unknown Arnold Jones, V.J.; Hodgson, D.A. orcid:0000-0002-3841-3746 Chepstow-Lusty, A. 2000 Palaeolimnological evidence for marked Holocene environmental changes on Signy Island, Antarctica. The Holocene, 10 (1). 43-60. https://doi.org/10.1191/095968300673046662 <https://doi.org/10.1191/095968300673046662> Publication - Article PeerReviewed 2000 ftnerc https://doi.org/10.1191/095968300673046662 2023-02-04T19:33:00Z 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 14C 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 Natural Environment Research Council: NERC Open Research Archive South Orkney Islands ENVELOPE(-45.500,-45.500,-60.583,-60.583) Signy Island ENVELOPE(-45.595,-45.595,-60.708,-60.708) Heywood ENVELOPE(-59.683,-59.683,-62.317,-62.317) The Holocene 10 1 43 60 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
unknown |
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 14C 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 |
Arnold |
publishDate |
2000 |
url |
http://nora.nerc.ac.uk/id/eprint/20609/ https://doi.org/10.1191/095968300673046662 |
long_lat |
ENVELOPE(-45.500,-45.500,-60.583,-60.583) ENVELOPE(-45.595,-45.595,-60.708,-60.708) ENVELOPE(-59.683,-59.683,-62.317,-62.317) |
geographic |
South Orkney Islands Signy Island Heywood |
geographic_facet |
South Orkney Islands Signy Island Heywood |
genre |
Antarc* Antarctica Signy Island South Orkney Islands |
genre_facet |
Antarc* Antarctica Signy Island South Orkney Islands |
op_relation |
Jones, V.J.; Hodgson, D.A. orcid:0000-0002-3841-3746 Chepstow-Lusty, A. 2000 Palaeolimnological evidence for marked Holocene environmental changes on Signy Island, Antarctica. The Holocene, 10 (1). 43-60. https://doi.org/10.1191/095968300673046662 <https://doi.org/10.1191/095968300673046662> |
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_ |
1766217189329731584 |