Direct evidence of aeolian deposition of marine diatoms to an ice sheet
Antarctic snow samples collected from the Wilkins Runway, c. 50 km inland from the Windmill Islands, East Antarctica, contain aeolian-derived diatoms. The diatom assemblage preserved is exclusively of marine origin. As diatoms are excellent indicators of source conditions, we are able to confirm tha...
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Language: | English |
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Cambridge University Press
2012
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Online Access: | https://espace.library.uq.edu.au/view/UQ:285306 |
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ftunivqespace:oai:espace.library.uq.edu.au:UQ:285306 2023-05-15T13:56:02+02:00 Direct evidence of aeolian deposition of marine diatoms to an ice sheet Budgeon, A. L. Roberts, D. Gasparon, M. Adams, N. 2012-10-01 https://espace.library.uq.edu.au/view/UQ:285306 eng eng Cambridge University Press doi:10.1017/S0954102012000235 issn:0954-1020 issn:1365-2079 Aeolian transport Ice core Snow Source 1105 Ecology Evolution Behavior and Systematics 1907 Geology 1910 Oceanography Journal Article 2012 ftunivqespace https://doi.org/10.1017/S0954102012000235 2020-08-05T04:13:42Z Antarctic snow samples collected from the Wilkins Runway, c. 50 km inland from the Windmill Islands, East Antarctica, contain aeolian-derived diatoms. The diatom assemblage preserved is exclusively of marine origin. As diatoms are excellent indicators of source conditions, we are able to confirm that an unusual weather event, with anomalous north-westerly winds blowing at around 10 m s, resulted in the deposition of coastal marine species at the Wilkins Runway. The composition of the floral assemblage collected indicate that the parent water mass was from a coastal marine region undergoing typical Antarctic summer conditions with periods of both consolidated sea ice and open water. On inspection of available satellite imagery, these conditions were found upwind of the deposition site. This study provides a methodology for diatoms found within ice cores to be identified and the source region to be determined. It also provides evidence for a large-scale aeolian deposition of marine diatoms to an ice sheet, which may have implications for the interpretation of controversial marine diatoms found in sediments that have been used as evidence for the retreat of the East Antarctic Ice Sheet. Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica ice core Ice Sheet Sea ice Windmill Islands The University of Queensland: UQ eSpace Antarctic East Antarctic Ice Sheet East Antarctica Wilkins ENVELOPE(59.326,59.326,-67.248,-67.248) Wilkins Runway ENVELOPE(11.529,11.529,-66.691,-66.691) Windmill Islands ENVELOPE(110.417,110.417,-66.350,-66.350) Antarctic Science 24 5 527 535 |
institution |
Open Polar |
collection |
The University of Queensland: UQ eSpace |
op_collection_id |
ftunivqespace |
language |
English |
topic |
Aeolian transport Ice core Snow Source 1105 Ecology Evolution Behavior and Systematics 1907 Geology 1910 Oceanography |
spellingShingle |
Aeolian transport Ice core Snow Source 1105 Ecology Evolution Behavior and Systematics 1907 Geology 1910 Oceanography Budgeon, A. L. Roberts, D. Gasparon, M. Adams, N. Direct evidence of aeolian deposition of marine diatoms to an ice sheet |
topic_facet |
Aeolian transport Ice core Snow Source 1105 Ecology Evolution Behavior and Systematics 1907 Geology 1910 Oceanography |
description |
Antarctic snow samples collected from the Wilkins Runway, c. 50 km inland from the Windmill Islands, East Antarctica, contain aeolian-derived diatoms. The diatom assemblage preserved is exclusively of marine origin. As diatoms are excellent indicators of source conditions, we are able to confirm that an unusual weather event, with anomalous north-westerly winds blowing at around 10 m s, resulted in the deposition of coastal marine species at the Wilkins Runway. The composition of the floral assemblage collected indicate that the parent water mass was from a coastal marine region undergoing typical Antarctic summer conditions with periods of both consolidated sea ice and open water. On inspection of available satellite imagery, these conditions were found upwind of the deposition site. This study provides a methodology for diatoms found within ice cores to be identified and the source region to be determined. It also provides evidence for a large-scale aeolian deposition of marine diatoms to an ice sheet, which may have implications for the interpretation of controversial marine diatoms found in sediments that have been used as evidence for the retreat of the East Antarctic Ice Sheet. |
format |
Article in Journal/Newspaper |
author |
Budgeon, A. L. Roberts, D. Gasparon, M. Adams, N. |
author_facet |
Budgeon, A. L. Roberts, D. Gasparon, M. Adams, N. |
author_sort |
Budgeon, A. L. |
title |
Direct evidence of aeolian deposition of marine diatoms to an ice sheet |
title_short |
Direct evidence of aeolian deposition of marine diatoms to an ice sheet |
title_full |
Direct evidence of aeolian deposition of marine diatoms to an ice sheet |
title_fullStr |
Direct evidence of aeolian deposition of marine diatoms to an ice sheet |
title_full_unstemmed |
Direct evidence of aeolian deposition of marine diatoms to an ice sheet |
title_sort |
direct evidence of aeolian deposition of marine diatoms to an ice sheet |
publisher |
Cambridge University Press |
publishDate |
2012 |
url |
https://espace.library.uq.edu.au/view/UQ:285306 |
long_lat |
ENVELOPE(59.326,59.326,-67.248,-67.248) ENVELOPE(11.529,11.529,-66.691,-66.691) ENVELOPE(110.417,110.417,-66.350,-66.350) |
geographic |
Antarctic East Antarctic Ice Sheet East Antarctica Wilkins Wilkins Runway Windmill Islands |
geographic_facet |
Antarctic East Antarctic Ice Sheet East Antarctica Wilkins Wilkins Runway Windmill Islands |
genre |
Antarc* Antarctic Antarctica East Antarctica ice core Ice Sheet Sea ice Windmill Islands |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica ice core Ice Sheet Sea ice Windmill Islands |
op_relation |
doi:10.1017/S0954102012000235 issn:0954-1020 issn:1365-2079 |
op_doi |
https://doi.org/10.1017/S0954102012000235 |
container_title |
Antarctic Science |
container_volume |
24 |
container_issue |
5 |
container_start_page |
527 |
op_container_end_page |
535 |
_version_ |
1766263245143801856 |