Articles | Volume 11, issue 11
https://doi.org/10.5194/cp-11-1507-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/cp-11-1507-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Research article
| 
12 Nov 2015
Research article |
| 12 Nov 2015
Stratification of surface waters during the last glacial millennial climatic events: a key factor in subsurface and deep-water mass dynamics
UMR 5805, EPOC (Environnements et Paléoenvironnements Océaniques et Continentaux), Université de Bordeaux, 33615 Pessac, France
F. Eynaud
UMR 5805, EPOC (Environnements et Paléoenvironnements Océaniques et Continentaux), Université de Bordeaux, 33615 Pessac, France
M. Sabine
UMR 5805, EPOC (Environnements et Paléoenvironnements Océaniques et Continentaux), Université de Bordeaux, 33615 Pessac, France
S. Zaragosi
UMR 5805, EPOC (Environnements et Paléoenvironnements Océaniques et Continentaux), Université de Bordeaux, 33615 Pessac, France
L. Rossignol
UMR 5805, EPOC (Environnements et Paléoenvironnements Océaniques et Continentaux), Université de Bordeaux, 33615 Pessac, France
B. Malaizé
UMR 5805, EPOC (Environnements et Paléoenvironnements Océaniques et Continentaux), Université de Bordeaux, 33615 Pessac, France
E. Palis
UMR 5805, EPOC (Environnements et Paléoenvironnements Océaniques et Continentaux), Université de Bordeaux, 33615 Pessac, France
now at: UMR 7329, Géoazur, Université de Sophia Antipolis, 06560 Valbonne, France
J. Zumaque
UMR 5805, EPOC (Environnements et Paléoenvironnements Océaniques et Continentaux), Université de Bordeaux, 33615 Pessac, France
now at: UQAM, Université du Québec à Montreal, Montréal, Québec H3C 3P8, Canada
C. Caulle
UMR 5805, EPOC (Environnements et Paléoenvironnements Océaniques et Continentaux), Université de Bordeaux, 33615 Pessac, France
now at: Laboratoire Péagos, Département Dynamiques des écosystèmes côtiers, IFREMER Brest, Technopôle Brest Iroise, 29280 Plouzané, France
A. Penaud
UMR 6538, Domaines Océaniques, IUEM-UBO, 29280 Plouzané, France
E. Michel
UMR 8212, LSCE (Laboratoire des Sciences du Climat et de l'Environnement), CEA/CNRS-INSU/UVSQ, 91198 Gif-sur-Yvette CEDEX, France
K. Charlier
UMR 5805, EPOC (Environnements et Paléoenvironnements Océaniques et Continentaux), Université de Bordeaux, 33615 Pessac, France
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A. Schmittner and D. C. Lund
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Model simulations of carbon isotope changes as a result of a reduction in the Atlantic Meridional Overturning Circulation (AMOC) agree well with sediment data from the early last deglaciation, supporting the idea that the AMOC was substantially reduced during that time period of global warming. We hypothesize, and present supporting evidence, that changes in the AMOC may have caused the coeval rise in atmospheric CO2, owing to a reduction in the efficiency of the ocean's biological pump.
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1. We have reconstructed new meridional thermal and precipitation stacked records in the Indo-Pacific Warm Pool (IPWP) during the last termination.
2. Meridional thermal gradient variations in the IPWP show tight links to the Northern Hemisphere millennial timescales event.
3. Anomalous warming in the south IPWP region could induce the southward shifting of the Intertropical Convergence Zone (ITCZ) in the IPWP during the Heinrich 1 and Younger Dryas events.
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O. Cartapanis, K. Tachikawa, O. E. Romero, and E. Bard
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S. Romahn, A. Mackensen, J. Groeneveld, and J. Pätzold
Clim. Past, 10, 293–303, https://doi.org/10.5194/cp-10-293-2014, https://doi.org/10.5194/cp-10-293-2014, 2014
M. M. Telesiński, R. F. Spielhagen, and H. A. Bauch
Clim. Past, 10, 123–136, https://doi.org/10.5194/cp-10-123-2014, https://doi.org/10.5194/cp-10-123-2014, 2014
J.-R. Riethdorf, D. Nürnberg, L. Max, R. Tiedemann, S. A. Gorbarenko, and M. I. Malakhov
Clim. Past, 9, 1345–1373, https://doi.org/10.5194/cp-9-1345-2013, https://doi.org/10.5194/cp-9-1345-2013, 2013
J. Zumaque, F. Eynaud, S. Zaragosi, F. Marret, K. M. Matsuzaki, C. Kissel, D. M. Roche, B. Malaizé, E. Michel, I. Billy, T. Richter, and E. Palis
Clim. Past, 8, 1997–2017, https://doi.org/10.5194/cp-8-1997-2012, https://doi.org/10.5194/cp-8-1997-2012, 2012
S. Weldeab
Clim. Past, 8, 1705–1716, https://doi.org/10.5194/cp-8-1705-2012, https://doi.org/10.5194/cp-8-1705-2012, 2012
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Short summary
This study reports the hydrological variations recorded at different depths of the water column SW of the Faeroe Is. during the last glacial abrupt climatic events (Heinrich events and Dansgaard-Oeschger cycles). Our combined multiproxy and high-resolution approach allows us to evidence that 1) Greenland and Heinrich stadials were characterized by strong stratification of surface waters, 2) this surface stratification seems to have played a key role in the dynamics of the underlying water masses
This study reports the hydrological variations recorded at different depths of the water column...
