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Planktonic foraminiferal flux seasonality in Subantarctic sediment traps: A test for paleoclimate reconstructions


King, AL and Howard, W, Planktonic foraminiferal flux seasonality in Subantarctic sediment traps: A test for paleoclimate reconstructions, Paleoceanography, 18, (1) pp. 1019. ISSN 0883-8305 (2003) [Refereed Article]

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Copyright © 2003 American Geophysical Union

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DOI: doi:10.1029/2002PA000839


Sediment trap moorings deployed during 1997 and 1998 in the Subantarctic to Polar Frontal regions of the Southern Ocean reveal distinct seasonality in foraminiferal flux. Foraminiferal assemblages vary between each site, yet major species exhibit very similar patterns of seasonal succession which can be associated with changes in mixed layer depth. Enhanced foraminiferal productivity is also associated with periods of high biogenic silica and particulate organic carbon flux. On a broader scale, foraminiferal assemblages are strongly delineated by temperature. Temperature estimates derived from the assemblages using the modern analog technique (MAT) are mostly within 2.5 C of the satellite advanced very high resolution radiometer temperatures observed during the deployment period. This indicates that core top sediments included in the MAT database do reflect modern observed conditions at the sea surface, providing a robust technique for estimating past temperature change from foraminiferal assemblages in Southern Ocean environments.

Item Details

Item Type:Refereed Article
Keywords:sediment traps, Southern Ocean, planktonic foraminifera, paleoclimate, modern analog technique, MAT
Research Division:Earth Sciences
Research Group:Climate change science
Research Field:Climate change processes
Objective Division:Environmental Policy, Climate Change and Natural Hazards
Objective Group:Understanding climate change
Objective Field:Understanding climate change not elsewhere classified
UTAS Author:King, AL (Miss Anna King)
UTAS Author:Howard, W (Associate Professor William Howard)
ID Code:56323
Year Published:2003
Web of Science® Times Cited:66
Deposited By:IASOS
Deposited On:2009-04-22
Last Modified:2012-11-20

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