(Table 1) Age determination of Chukchi Sea sediments ...

Dinocysts from cores collected in the Chukchi Sea from the shelf edge to the lower slope were used to reconstruct changes in sea surface conditions and sea ice cover using modern analogue techniques. Holocene sequences have been recovered in a down-slope core (B15: 2135 m, 75°44'N, sedimentatio...

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Bibliographic Details
Main Authors: de Vernal, Anne, Hillaire-Marcel, Claude, Darby, Dennis A
Format: Dataset
Language:English
Published: PANGAEA 2005
Subjects:
Event label
DEPTH, sediment/rock
Depth, top/min
Depth, bottom/max
Depth, composite
Age, dated material
Age, dated
Age, dated standard deviation
Box corer
Piston corer
Age, 14C AMS
Age, 14C calibrated
Arctic Ocean
Bering Sea
Chukchi
Chukchi Sea
Sea ice
Online Access:https://dx.doi.org/10.1594/pangaea.835175
https://doi.pangaea.de/10.1594/PANGAEA.835175
Description
Summary:Dinocysts from cores collected in the Chukchi Sea from the shelf edge to the lower slope were used to reconstruct changes in sea surface conditions and sea ice cover using modern analogue techniques. Holocene sequences have been recovered in a down-slope core (B15: 2135 m, 75°44'N, sedimentation rate of ~1 cm/kyr) and in a shelf core (P1: 201 m, 73°41'N, sedimentation rate of ~22 cm/kyr). The shelf record spanning about 8000 years suggests high-frequency centennial oscillations of sea surface conditions and a significant reduction of the sea ice at circa 6000 and 2500 calendar (cal) years B.P. The condensed offshore record (B15) reveals an early postglacial optimum with minimum sea ice cover prior to 12,000 cal years B.P., which corresponds to a terrestrial climate optimum in Bering Sea area. Dinocyst data indicate extensive sea ice cover (>10 months/yr) from 12,000 to 6000 cal years B.P. followed by a general trend of decreasing sea ice and increasing sea surface salinity conditions, superimposed on ... : Supplement to: de Vernal, Anne; Hillaire-Marcel, Claude; Darby, Dennis A (2005): Variability of sea ice cover in the Chukchi Sea (western Arctic Ocean) during the Holocene. Paleoceanography, 20(4), PA4018 ...

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