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Late Holocene increase in sea ice extent in fjords of the Vestfold Hills, eastern Antarctica


McMinn, A, Late Holocene increase in sea ice extent in fjords of the Vestfold Hills, eastern Antarctica, Antarctic Science, 12, (1) pp. 80-88. ISSN 0954-1020 (2000) [Refereed Article]

DOI: doi:10.1017/S0954102000000110


Sediment cores from Abel and Platcha Bays, in the Vestfold Hills, east Antarctica, contain evidence for a local late Holocene increase in fast ice extent and a possible ice cap retreat at approximately 1750 yr BP, a similar time to the Chelnock Glaciation. Prior to this time both bays experienced periods of isolation that lead to changes in their diatom flora, C:N ratio, percentage of biogenic silica and total organic carbon. Three new diatom indices are proposed; the fast ice index, based on the proportion of fast ice taxa present, the benthic index, based on the proportion of benthic taxa and the snow index, based on the proportion Berkelaya adeliense and Thalassiosira australis. These indices show strong relationships with the percentage of biogenic silica, total organic carbon and percentage sand. A weak relationship exists between the fast ice index and δ13C and no relationship with the C:N ratio.

Item Details

Item Type:Refereed Article
Research Division:Earth Sciences
Research Group:Geology
Research Field:Palaeontology (incl. palynology)
Objective Division:Environmental Policy, Climate Change and Natural Hazards
Objective Group:Adaptation to climate change
Objective Field:Social impacts of climate change and variability
UTAS Author:McMinn, A (Professor Andrew McMinn)
ID Code:19271
Year Published:2000
Web of Science® Times Cited:23
Deposited By:IASOS
Deposited On:2000-08-01
Last Modified:2001-04-26

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