Late Quaternary environment of southern Windmill Islands, East Antarctica
Analyses on a sediment core collected from the Windmill Islands, East Antarctica are used to demonstrate that climatic conditions in this region prior to the Last Glacial Maximum were similar to those during the Holocene and that the area was overrun by ice at some stage between 26 kyr BP and the on...
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Online Access: | https://researchers.mq.edu.au/en/publications/d54ede0c-4071-48ff-ab56-39a9034553c5 https://doi.org/10.1017/S0954102002000202 https://research-management.mq.edu.au/ws/files/62457917/Publisher%20version%20(open%20access).pdf http://www.scopus.com/inward/record.url?scp=0036919471&partnerID=8YFLogxK |
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ftmacquarieunicr:oai:https://researchers.mq.edu.au:publications/d54ede0c-4071-48ff-ab56-39a9034553c5 2024-10-13T14:02:20+00:00 Late Quaternary environment of southern Windmill Islands, East Antarctica Kirkup, Helen Melles, Martin Gore, Damian B. 2002-12 application/pdf https://researchers.mq.edu.au/en/publications/d54ede0c-4071-48ff-ab56-39a9034553c5 https://doi.org/10.1017/S0954102002000202 https://research-management.mq.edu.au/ws/files/62457917/Publisher%20version%20(open%20access).pdf http://www.scopus.com/inward/record.url?scp=0036919471&partnerID=8YFLogxK eng eng info:eu-repo/semantics/openAccess Kirkup , H , Melles , M & Gore , D B 2002 , ' Late Quaternary environment of southern Windmill Islands, East Antarctica ' , Antarctic Science , vol. 14 , no. 4 , pp. 385-394 . https://doi.org/10.1017/S0954102002000202 article 2002 ftmacquarieunicr https://doi.org/10.1017/S0954102002000202 2024-09-26T15:15:55Z Analyses on a sediment core collected from the Windmill Islands, East Antarctica are used to demonstrate that climatic conditions in this region prior to the Last Glacial Maximum were similar to those during the Holocene and that the area was overrun by ice at some stage between 26 kyr BP and the onset of biogenic sedimentation 11 kyr BP. The 10.9 m long core was taken from a marine inlet (epishelf lake) on Peterson Island and is predominantly a sapropel of Holocene age. Material in the lower part of the core includes a till layer lain down during the last glacial in the region and below this till is material which has been dated to 26 kyr BP. Geochemical analyses conducted on the core demonstrate similarities between the Holocene sequence and the preglacial material. The Holocene sequence shows enhanced biogenic production and periods of open water around 4 kyr BP, suggesting a climatic optimum around that time. A subsequent decline in conditions, probably a colder climate with greater extent of sea ice, is evident from 1 kyr BP to the present. The data support results from ice core studies on nearby Law Dome, which suggest there was a period of warming around 11.5 to 9 kyr BP, that recent summer temperatures are low relative to a few centuries ago, and that increasing winter temperatures are the main contributing factor to a recent overall warming in the region. Article in Journal/Newspaper Antarc* Antarctic Science Antarctica East Antarctica ice core Peterson Island Sea ice Windmill Islands Macquarie University Research Portal East Antarctica Law Dome ENVELOPE(112.833,112.833,-66.733,-66.733) Peterson Island ENVELOPE(-99.096,-99.096,56.896,56.896) Windmill Islands ENVELOPE(110.417,110.417,-66.350,-66.350) Antarctic Science 14 4 385 394 |
institution |
Open Polar |
collection |
Macquarie University Research Portal |
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ftmacquarieunicr |
language |
English |
description |
Analyses on a sediment core collected from the Windmill Islands, East Antarctica are used to demonstrate that climatic conditions in this region prior to the Last Glacial Maximum were similar to those during the Holocene and that the area was overrun by ice at some stage between 26 kyr BP and the onset of biogenic sedimentation 11 kyr BP. The 10.9 m long core was taken from a marine inlet (epishelf lake) on Peterson Island and is predominantly a sapropel of Holocene age. Material in the lower part of the core includes a till layer lain down during the last glacial in the region and below this till is material which has been dated to 26 kyr BP. Geochemical analyses conducted on the core demonstrate similarities between the Holocene sequence and the preglacial material. The Holocene sequence shows enhanced biogenic production and periods of open water around 4 kyr BP, suggesting a climatic optimum around that time. A subsequent decline in conditions, probably a colder climate with greater extent of sea ice, is evident from 1 kyr BP to the present. The data support results from ice core studies on nearby Law Dome, which suggest there was a period of warming around 11.5 to 9 kyr BP, that recent summer temperatures are low relative to a few centuries ago, and that increasing winter temperatures are the main contributing factor to a recent overall warming in the region. |
format |
Article in Journal/Newspaper |
author |
Kirkup, Helen Melles, Martin Gore, Damian B. |
spellingShingle |
Kirkup, Helen Melles, Martin Gore, Damian B. Late Quaternary environment of southern Windmill Islands, East Antarctica |
author_facet |
Kirkup, Helen Melles, Martin Gore, Damian B. |
author_sort |
Kirkup, Helen |
title |
Late Quaternary environment of southern Windmill Islands, East Antarctica |
title_short |
Late Quaternary environment of southern Windmill Islands, East Antarctica |
title_full |
Late Quaternary environment of southern Windmill Islands, East Antarctica |
title_fullStr |
Late Quaternary environment of southern Windmill Islands, East Antarctica |
title_full_unstemmed |
Late Quaternary environment of southern Windmill Islands, East Antarctica |
title_sort |
late quaternary environment of southern windmill islands, east antarctica |
publishDate |
2002 |
url |
https://researchers.mq.edu.au/en/publications/d54ede0c-4071-48ff-ab56-39a9034553c5 https://doi.org/10.1017/S0954102002000202 https://research-management.mq.edu.au/ws/files/62457917/Publisher%20version%20(open%20access).pdf http://www.scopus.com/inward/record.url?scp=0036919471&partnerID=8YFLogxK |
long_lat |
ENVELOPE(112.833,112.833,-66.733,-66.733) ENVELOPE(-99.096,-99.096,56.896,56.896) ENVELOPE(110.417,110.417,-66.350,-66.350) |
geographic |
East Antarctica Law Dome Peterson Island Windmill Islands |
geographic_facet |
East Antarctica Law Dome Peterson Island Windmill Islands |
genre |
Antarc* Antarctic Science Antarctica East Antarctica ice core Peterson Island Sea ice Windmill Islands |
genre_facet |
Antarc* Antarctic Science Antarctica East Antarctica ice core Peterson Island Sea ice Windmill Islands |
op_source |
Kirkup , H , Melles , M & Gore , D B 2002 , ' Late Quaternary environment of southern Windmill Islands, East Antarctica ' , Antarctic Science , vol. 14 , no. 4 , pp. 385-394 . https://doi.org/10.1017/S0954102002000202 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1017/S0954102002000202 |
container_title |
Antarctic Science |
container_volume |
14 |
container_issue |
4 |
container_start_page |
385 |
op_container_end_page |
394 |
_version_ |
1812816476636184576 |