Absence of a Medieval Climate Anomaly, Little Ice Age and twentieth century warming in Skarvsnes, Lutzow Holm Bay, East Antarctica
Palaeoclimate changes, such as the Medieval Climate Anomaly and the Little Ice Age, are well-defined in the Northern Hemisphere during the past 2000 years. In contrast, these anomalies appear to be either absent, or less well-defined, in high-latitude regions of the Southern Hemisphere. Here, we inf...
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2014
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ftunivgent:oai:archive.ugent.be:5783000 2023-06-11T04:05:24+02:00 Absence of a Medieval Climate Anomaly, Little Ice Age and twentieth century warming in Skarvsnes, Lutzow Holm Bay, East Antarctica Tavernier, Ines Verleyen, Elie Hodgson, Dominic A Heirman, Katrien Roberts, Stephen J Imura, Satoshi Kudoh, Sakae Sabbe, Koen De Batist, Marc Vyverman, Wim 2014 application/pdf https://biblio.ugent.be/publication/5783000 http://hdl.handle.net/1854/LU-5783000 https://doi.org/10.1017/S0954102014000029 https://biblio.ugent.be/publication/5783000/file/5783617 eng eng https://biblio.ugent.be/publication/5783000 http://hdl.handle.net/1854/LU-5783000 http://dx.doi.org/10.1017/S0954102014000029 https://biblio.ugent.be/publication/5783000/file/5783617 No license (in copyright) info:eu-repo/semantics/restrictedAccess ANTARCTIC SCIENCE ISSN: 0954-1020 Earth and Environmental Sciences Holocene climate changes diatom-based transfer function isolation basin palaeoclimatology Syowa Oasis HOLOCENE CLIMATE WINDMILL ISLANDS DIATOM FLORA PENINSULA HISTORY CALIBRATION BASIN LAKES BP PERSPECTIVE journalArticle info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2014 ftunivgent https://doi.org/10.1017/S0954102014000029 2023-05-10T22:24:19Z Palaeoclimate changes, such as the Medieval Climate Anomaly and the Little Ice Age, are well-defined in the Northern Hemisphere during the past 2000 years. In contrast, these anomalies appear to be either absent, or less well-defined, in high-latitude regions of the Southern Hemisphere. Here, we inferred environmental changes during the past two millennia from proxies in a sediment core from Mago Ike, an East Antarctic lake in Skarvsnes (Lutzow Holm Bay). Variations in lake primary production were inferred from fossil pigments, sedimentological and geochemical proxies and combined with absolute diatom counts to infer past diatom productivity and community changes. Three distinct stratigraphic zones were recognized, resulting from a shift from marine to lacustrine conditions with a clear transition zone in between. The presence of open-watermarine diatoms indicates a coastal zone seasonally free of sea ice between c. 2120-1500 cal yr BP. Subsequently, the lake became isolated from the ocean due to isostatic uplift. Freshwater conditions were established from c. 1120 cal yr BP onwards after which the proxies are considered highly sensitive to temperature changes. There is no evidence for a Medieval Climate Anomaly, Little Ice Age or twentieth century warming in our lake sediment record suggesting that studies that have imposed Northern Hemisphere climate anomalies onto Southern Hemisphere palaeoclimate records should be treated with caution. Article in Journal/Newspaper Antarc* Antarctic Antarctic Science Antarctica East Antarctica Sea ice Windmill Islands Ghent University Academic Bibliography Antarctic East Antarctica Windmill Islands ENVELOPE(110.417,110.417,-66.350,-66.350) Skarvsnes ENVELOPE(39.667,39.667,-69.467,-69.467) Mago Ike ENVELOPE(39.633,39.633,-69.473,-69.473) Antarctic Science 26 5 585 598 |
institution |
Open Polar |
collection |
Ghent University Academic Bibliography |
op_collection_id |
ftunivgent |
language |
English |
topic |
Earth and Environmental Sciences Holocene climate changes diatom-based transfer function isolation basin palaeoclimatology Syowa Oasis HOLOCENE CLIMATE WINDMILL ISLANDS DIATOM FLORA PENINSULA HISTORY CALIBRATION BASIN LAKES BP PERSPECTIVE |
spellingShingle |
Earth and Environmental Sciences Holocene climate changes diatom-based transfer function isolation basin palaeoclimatology Syowa Oasis HOLOCENE CLIMATE WINDMILL ISLANDS DIATOM FLORA PENINSULA HISTORY CALIBRATION BASIN LAKES BP PERSPECTIVE Tavernier, Ines Verleyen, Elie Hodgson, Dominic A Heirman, Katrien Roberts, Stephen J Imura, Satoshi Kudoh, Sakae Sabbe, Koen De Batist, Marc Vyverman, Wim Absence of a Medieval Climate Anomaly, Little Ice Age and twentieth century warming in Skarvsnes, Lutzow Holm Bay, East Antarctica |
topic_facet |
Earth and Environmental Sciences Holocene climate changes diatom-based transfer function isolation basin palaeoclimatology Syowa Oasis HOLOCENE CLIMATE WINDMILL ISLANDS DIATOM FLORA PENINSULA HISTORY CALIBRATION BASIN LAKES BP PERSPECTIVE |
description |
Palaeoclimate changes, such as the Medieval Climate Anomaly and the Little Ice Age, are well-defined in the Northern Hemisphere during the past 2000 years. In contrast, these anomalies appear to be either absent, or less well-defined, in high-latitude regions of the Southern Hemisphere. Here, we inferred environmental changes during the past two millennia from proxies in a sediment core from Mago Ike, an East Antarctic lake in Skarvsnes (Lutzow Holm Bay). Variations in lake primary production were inferred from fossil pigments, sedimentological and geochemical proxies and combined with absolute diatom counts to infer past diatom productivity and community changes. Three distinct stratigraphic zones were recognized, resulting from a shift from marine to lacustrine conditions with a clear transition zone in between. The presence of open-watermarine diatoms indicates a coastal zone seasonally free of sea ice between c. 2120-1500 cal yr BP. Subsequently, the lake became isolated from the ocean due to isostatic uplift. Freshwater conditions were established from c. 1120 cal yr BP onwards after which the proxies are considered highly sensitive to temperature changes. There is no evidence for a Medieval Climate Anomaly, Little Ice Age or twentieth century warming in our lake sediment record suggesting that studies that have imposed Northern Hemisphere climate anomalies onto Southern Hemisphere palaeoclimate records should be treated with caution. |
format |
Article in Journal/Newspaper |
author |
Tavernier, Ines Verleyen, Elie Hodgson, Dominic A Heirman, Katrien Roberts, Stephen J Imura, Satoshi Kudoh, Sakae Sabbe, Koen De Batist, Marc Vyverman, Wim |
author_facet |
Tavernier, Ines Verleyen, Elie Hodgson, Dominic A Heirman, Katrien Roberts, Stephen J Imura, Satoshi Kudoh, Sakae Sabbe, Koen De Batist, Marc Vyverman, Wim |
author_sort |
Tavernier, Ines |
title |
Absence of a Medieval Climate Anomaly, Little Ice Age and twentieth century warming in Skarvsnes, Lutzow Holm Bay, East Antarctica |
title_short |
Absence of a Medieval Climate Anomaly, Little Ice Age and twentieth century warming in Skarvsnes, Lutzow Holm Bay, East Antarctica |
title_full |
Absence of a Medieval Climate Anomaly, Little Ice Age and twentieth century warming in Skarvsnes, Lutzow Holm Bay, East Antarctica |
title_fullStr |
Absence of a Medieval Climate Anomaly, Little Ice Age and twentieth century warming in Skarvsnes, Lutzow Holm Bay, East Antarctica |
title_full_unstemmed |
Absence of a Medieval Climate Anomaly, Little Ice Age and twentieth century warming in Skarvsnes, Lutzow Holm Bay, East Antarctica |
title_sort |
absence of a medieval climate anomaly, little ice age and twentieth century warming in skarvsnes, lutzow holm bay, east antarctica |
publishDate |
2014 |
url |
https://biblio.ugent.be/publication/5783000 http://hdl.handle.net/1854/LU-5783000 https://doi.org/10.1017/S0954102014000029 https://biblio.ugent.be/publication/5783000/file/5783617 |
long_lat |
ENVELOPE(110.417,110.417,-66.350,-66.350) ENVELOPE(39.667,39.667,-69.467,-69.467) ENVELOPE(39.633,39.633,-69.473,-69.473) |
geographic |
Antarctic East Antarctica Windmill Islands Skarvsnes Mago Ike |
geographic_facet |
Antarctic East Antarctica Windmill Islands Skarvsnes Mago Ike |
genre |
Antarc* Antarctic Antarctic Science Antarctica East Antarctica Sea ice Windmill Islands |
genre_facet |
Antarc* Antarctic Antarctic Science Antarctica East Antarctica Sea ice Windmill Islands |
op_source |
ANTARCTIC SCIENCE ISSN: 0954-1020 |
op_relation |
https://biblio.ugent.be/publication/5783000 http://hdl.handle.net/1854/LU-5783000 http://dx.doi.org/10.1017/S0954102014000029 https://biblio.ugent.be/publication/5783000/file/5783617 |
op_rights |
No license (in copyright) info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1017/S0954102014000029 |
container_title |
Antarctic Science |
container_volume |
26 |
container_issue |
5 |
container_start_page |
585 |
op_container_end_page |
598 |
_version_ |
1768375169093468160 |