Not logged in
PANGAEA.
Data Publisher for Earth & Environmental Science

Roth, Sven; Reijmer, John J G (2004): Age determination of sediment core MD99-2201. PANGAEA, https://doi.org/10.1594/PANGAEA.841267, Supplement to: Roth, S; Reijmer, JJG (2004): Holocene Atlantic climate variations deduced from carbonate periplatform sediments (leeward margin, Great Bahama Bank). Paleoceanography, 19(1), PA1003, https://doi.org/10.1029/2003PA000885

Always quote above citation when using data! You can download the citation in several formats below.

RIS CitationBibTeX CitationShow MapGoogle Earth

Abstract:
A marine sediment core from the leeward margin of Great Bahama Bank (GBB) was subjected to a multiproxy study. The aragonite dominated core MD992201 comprises the past 7230 years in a decadal time resolution and shows sedimentation rates of up to 13.8 m/kyr. Aragonite mass accumulation rates, age differences between planktonic foraminifera and aragonite sediments, and temperature distribution are used to deduce changes in aragonite production rates and paleocurrent strengths. Aragonite precipitation rates on GBB are controlled by exchange of carbonate ions and CO2 loss due to temperature-salinity conditions and biological activity, and these are dependent on the current strength. Paleocurrent strengths on GBB show high current velocities during the periods 6000–5100 years BP, 3500–2700 years BP, and 1600–700 years BP; lower current speeds existed during the time intervals 5100–3500 years BP, 2700–1600 years BP, and 700–100 years BP. Bahamian surface currents are directly linked to the North Atlantic atmospheric circulation, and thus periods with high (low) current speeds are proposed to be phases of strong (weak) atmospheric circulation.
Project(s):
International Marine Global Change Study (IMAGES)
Coverage:
Latitude: 25.891500 * Longitude: -79.272333
Date/Time Start: 1999-08-01T00:00:00 * Date/Time End: 1999-08-01T00:00:00
Event(s):
MD99-2201 (95G) * Latitude: 25.891500 * Longitude: -79.272333 * Date/Time: 1999-08-01T00:00:00 * Elevation: -290.0 m * Recovery: 38.05 m * Location: Great Bahama Bank * Campaign: MD114 (IMAGES V) * Basis: Marion Dufresne * Device: Calypso Corer (CALYPSO)
Size:
2 datasets

Download Data

Download ZIP file containing all datasets as tab-delimited text (use the following character encoding: )