Waelbroeck, Claire; Skinner, Luke C; Labeyrie, Laurent D; Duplessy, Jean-Claude; Michel, Elisabeth; Vázquez Riveiros, Natalia; Gherardi, Jeanne-Marie; Dewilde, Fabien (2014): (Table S1) Age determination of Atlantic Ocean sediment cores [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.829755, Supplement to: Waelbroeck, C et al. (2011): The timing of deglacial circulation changes in the Atlantic. Paleoceanography, 26(3), PA3213, https://doi.org/10.1029/2010PA002007
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Abstract:
Well-dated benthic foraminifer oxygen isotopic records (d18O) from different water depths and locations within the Atlantic Ocean exhibit distinct patterns and significant differences in timing over the last deglaciation. This has two implications: on the one hand, it confirms that benthic d18O cannot be used as a global correlation tool with millennial-scale precision, but on the other hand, the combination of benthic isotopic records with independent dating provides a wealth of information on past circulation changes. Comparing new South Atlantic benthic isotopic data with published benthic isotopic records, we show that (1) circulation changes first affected benthic d18O in the 1000-2200 m range, with marked decreases in benthic d18O taking place at ~17.5 cal. kyr B.P. (ka) due to the southward propagation of brine waters generated in the Nordic Seas during Heinrich Stadial 1 (HS1) cold period; (2) the arrival of d18O-depleted deglacial meltwater took place later at deeper North Atlantic sites; (3) hydrographic changes recorded in North Atlantic cores below 3000 m during HS1 do not correspond to simple alternations between northern- and southern-sourced water but likely reflect instead the incursion of brine-generated deep water of northern as well as southern origin; and (4) South Atlantic waters at ~44°S and ~3800 m depth remained isolated from better-ventilated northern-sourced water masses until after the resumption of North Atlantic Deep Water (NADW) formation at the onset of the Bølling-Allerod, which led to the propagation of NADW into the South Atlantic.
Related to:
Gherardi, Jeanne-Marie; Labeyrie, Laurent D; Nave, Silvia Osorio; Francois, Roger; McManus, Jerry F; Cortijo, Elsa (2009): Glacial-interglacial circulation changes inferred from 231Pa/230Th sedimentary record in the North Atlantic region. Paleoceanography, 24(2), PA2204, https://doi.org/10.1029/2008PA001696
Keigwin, Lloyd D; Jones, Glenn A (1994): Western North Atlantic evidence for millennial-scale changes in ocean circulation and climate. Journal of Geophysical Research, 99(C6), 12397-12410, https://doi.org/10.1029/94JC00525
Reimer, Paula J; Baillie, Mike G L; Bard, Edouard; Bayliss, Alex; Beck, J Warren; Blackwell, Paul G; Ramsey, Christopher Bronk; Burr, George S; Edwards, R Lawrence; Friedrich, Michael; Grootes, Pieter Meiert; Guilderson, Thomas P; Hajdas, Irena; Heaton, T J; Hogg, Alan G; Hughen, Konrad A; Kaiser, Klaus-Felix; Kromer, Bernd; McCormac, F Gerry; Manning, Sturt W; Reimer, Ron W; Richards, David A; Southon, John R; Talamo, Sahra; Turney, Chris S M; van der Plicht, Johannes; Weyhenmeyer, Constanze E (2009): IntCal09 and Marine09 Radiocarbon Age Calibration Curves, 0-50,000 Years cal BP. Radiocarbon, 51(4), 1111-1150, https://doi.org/10.1017/S0033822200034202
Rühlemann, Carsten; Mulitza, Stefan; Müller, Peter J; Wefer, Gerold; Zahn, Rainer (1999): Warming of the tropical Atlantic Ocean and slowdown of thermohaline circulation during the last deglaciation. Nature, 402(6761), 511-514, https://doi.org/10.1038/990069
Skinner, Luke C; Fallon, Robert D; Waelbroeck, Claire; Michel, Elisabeth; Barker, S (2010): Ventilation of the Deep Southern Ocean and Deglacial CO2 Rise. Science, 328(5982), 1147-1151, https://doi.org/10.1126/science.1183627
Skinner, Luke C; Shackleton, Nicholas J; Elderfield, Henry (2003): Millennial-scale variability of deep-water temperature and d18Odw indicating deep-water source variations in the Northeast Atlantic, 0-34 cal. ka BP. Geochemistry, Geophysics, Geosystems, 4(12), https://doi.org/10.1029/2003GC000585
Vidal, Laurence; Schneider, Ralph R; Marchal, Olivier; Bickert, Torsten; Stocker, Thomas F; Wefer, Gerold (1999): Link between the North and South Atlantic during the Heinrich events of the last galcial period. Climate Dynamics, 15(12), 909-919, https://doi.org/10.1007/s003820050321
Waelbroeck, Claire; Duplessy, Jean-Claude; Michel, Elisabeth; Labeyrie, Laurent D; Paillard, Didier; Duprat, Josette M (2001): The timing of the last deglaciation in North Atlantic climate records. Nature, 412(6848), 724-727, https://doi.org/10.1038/35089060
Waelbroeck, Claire; Levi, Camille; Duplessy, Jean-Claude; Labeyrie, Laurent D; Michel, Elisabeth; Cortijo, Elsa; Bassinot, Franck C; Guichard, Francois (2006): Distant origin of circulation changes in the Indian Ocean during the last deglaciation. Earth and Planetary Science Letters, 243(1-2), 244-251, https://doi.org/10.1016/j.epsl.2005.12.031
Further details:
Meese, D A; Gow, A J; Alley, Richard B; Zielinski, G A; Grootes, Pieter Meiert; Ram, M; Taylor, Kendrick C; Mayewski, Paul Andrew; Bolzan, J F (1997): The Greenland Ice Sheet Project 2 depth-age scale: Methods and results. Journal of Geophysical Research: Oceans, 102(C12), 26411-26424, https://doi.org/10.1029/97JC00269
Rasmussen, Tine Lander; Thomsen, Erik; van Weering, Tjeerd C E (1998): Cyclic sedimentation on the Faeroe Drift 53-10 ka BP related to climatic variations. In: Stoker, MS; Evans, D; Cramp, A (eds), Geological Processes on Continental Margins: Sedimentation, Mass-Wasting and Stability, Geology Society, London, Special Publications, 129, 255-267
Rühlemann, Carsten; Mulitza, Stefan; Müller, Peter J; Wefer, Gerold; Zahn, Rainer (2006): (Table 1) Age determination of sediment core M35003-4 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.438798 (Age model of M35003-4)
Stuiver, Minze; Reimer, Paula J (1993): Extended 14C data base and revised CALIB 3.0 14C age calibration program. Radiocarbon, 35(1), 215-230, https://doi.org/10.1017/S0033822200013904
Coverage:
Median Latitude: 25.100838 * Median Longitude: -20.891442 * South-bound Latitude: -44.153330 * West-bound Longitude: -57.615000 * North-bound Latitude: 62.440000 * East-bound Longitude: 12.376667
Date/Time Start: 1992-01-11T00:00:00 * Date/Time End: 1999-09-14T00:00:00
Minimum DEPTH, sediment/rock: 0.005 m * Maximum DEPTH, sediment/rock: 21.670 m
Event(s):
CH69-K09 * Latitude: 41.760000 * Longitude: -47.350000 * Elevation: -4100.0 m * IGSN: BFBGX-111867 * Location: Newfoundland margin * Method/Device: Gravity corer (GC)
ENAM93-21 (ENAM9321) * Latitude: 62.440000 * Longitude: -3.529200 * Elevation: -1020.0 m * Recovery: 11 m * Location: Faroe Islands margin * Method/Device: Piston corer (PC)
GeoB1711-4 (GeoB1711) * Latitude: -23.315000 * Longitude: 12.376667 * Date/Time: 1992-01-11T00:00:00 * Elevation: -1967.0 m * Recovery: 10.66 m * Location: Namibia continental slope * Campaign: M20/2 * Basis: Meteor (1986) * Method/Device: Gravity corer (Kiel type) (SL) * Comment: CC: Tonschl., olive, H2S, Foram.
Comment:
Core ENAM9321 age model is mainly based on correlation to GRIP ice d18O (Rasmussen et al., 1998). Core NA87-22 age model is fully described by Waelbroeck et al. (2001, 2006). Core MD95-2037 is published in the work by Gherardi et al. (2009). Core M35003-4 is described by Rühlemann et al. (1999). Core GeoB1711 is described by Vidal et al. (1999) and Waelbroeck et al. (2006). Core MD99-2334K is described by Skinner et al. (2003). Resulting errors on the calendar age have been computed in the present study as the maximum between the error on the calibrated age and the offset between the calibrated age and GISP2 age (Meese et al., 1997). Core KNR31 GPC-5 14C dates are from (Keigwin and Jones, 1994). Calendar ages have been computed using the Calib6.0 software (Stuiver and Reimer, 1993) and calibration data set marine09.14C (Reimer et al., 2009), assuming no additional surface reservoir age correction. Core MD07-3076 age model is fully described by Skinner et al. (2010).
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | ||||
| 2 | Latitude of event | Latitude | ||||
| 3 | Longitude of event | Longitude | ||||
| 4 | Elevation of event | Elevation | m | |||
| 5 | Laboratory code/label | Lab label | Waelbroeck, Claire | |||
| 6 | DEPTH, sediment/rock | Depth sed | m | Geocode | ||
| 7 | Depth, top/min | Depth top | m | Waelbroeck, Claire | ||
| 8 | Depth, bottom/max | Depth bot | m | Waelbroeck, Claire | ||
| 9 | Age, dated material | Dated material | Waelbroeck, Claire | |||
| 10 | Age, dated | Age dated | ka | Waelbroeck, Claire | Age, 14C AMS | |
| 11 | Age, dated standard deviation | Age dated std dev | ± | Waelbroeck, Claire | Age, 14C AMS | |
| 12 | Calendar age | Cal age | ka BP | Waelbroeck, Claire | Age, 14C calibrated | |
| 13 | Calendar age, standard error | Cal age std e | ± | Waelbroeck, Claire | Age, 14C calibrated |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
1313 data points