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Sesonality of foraminiferal flux in sediment traps at Chatham Rise, SW Pacific: implications for paleotemperature estimates
Citation
King, AL and Howard, W, Sesonality of foraminiferal flux in sediment traps at Chatham Rise, SW Pacific: implications for paleotemperature estimates, Deep Sea Research Part I: Oceanographic Research Papers, 48, (7) pp. 1687-1708. ISSN 0967-0637 (2001) [Refereed Article]
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DOI: doi:10.1016/S0967-0637(00)00106-0
Abstract
Analysis of sediment traps located either side of the Subtropical Front east of New Zealand reveals
a strong association between water masses and foraminiferal assemblages. The composition and timing of
foraminiferal productivity is distinct between waters north and south of the front, and these di!erences are
also re#ected in the assemblages of nearby core-tops. The sediment trap data indicate highly seasonal #ux
patterns in this region, so sedimentary records may represent #ux during a particular season, rather than
throughout the annual cycle. This pronounced seasonality has implications for our estimates of the annual
temperature range based on faunal assemblages. This study shows that despite strong #ux seasonality the
annual sea-surface temperature (SST) range is reliably estimated from the sediment trap foraminiferal
assemblages by the modern analog technique. The successful estimation of the annual SST range also
indicates that the annual #ux obtained from these sediment traps is representative of the longer term #ux
preserved in surface sediments. Core-top assemblages from this region can therefore be directly related to
modern sea-surface conditions, providing an analogue for interpreting past environmental change from fossil
assemblages.
Item Details
Item Type: | Refereed Article |
---|---|
Keywords: | Particulate fux; Paleoceanography; Foraminifera; Subtropical convergences; Oceanic fronts; New Zealand |
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: | 56322 |
Year Published: | 2001 |
Web of Science® Times Cited: | 51 |
Deposited By: | IASOS |
Deposited On: | 2009-04-22 |
Last Modified: | 2009-06-01 |
Downloads: | 0 |
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