Consistently dated Atlantic sediment cores over the last 40 thousand years
|Author(s)||Waelbroeck Claire1, Lougheed Bryan C.1, Vazquez Riveiros Natalia1, 2, Missiaen Lise1, Pedro Joel3, Dokken Trond3, Hajdas Irka4, Wacker Lukas4, Abbott Peter5, Dumoulin Jean-Pascal1, Thil François1, Eynaud Frédérique6, Rossignol Linda6, Fersi Wiem1, Albuquerque Ana Luiza, Arz Helge, Austin William, Came Rosemarie, Carlson Anders, Collins James, Dennielou Bernard2, Desprat Stéphanie6, Dickson Alex, Elliot Mary, Farmer Christa, Giraudeau Jacques, Gottschalk Julia, Henderiks Jorijntje, Hughen Konrad, Jung Simon, Knutz Paul, Lebreiro Susana, Lund David, Lynch-Stieglitz Jean, Malaizé Bruno6, Marchitto Thomas, Martinez Mendez Gema, Mollenhauer Gesine, Naughton Filipa, Nave Silvia, Nünberg Dirk, Oppo Delia, Peck Victoria, Penaud Aurélie, Portilho Ramos Rodrigo, Repschläger Janne, Roberts Jenny, Rühlemann Carsten, Salgueiro Emilia, Sanchez Goni Maria6, Schönfeld Joachim, Scussolini Paolo, Skonieczny Charlotte, Thornalley David, Toucanne Samuel2, Van Rooij David, Vidal Laurence, Voelker Antje, Wary Mélanie, Weldeab Syee, Ziegler Martin|
|Affiliation(s)||1 : CNRS, UMR8212, bât. 714, 91191 Orme des Merisiers, France
2 : Ifremer, Unité de Geosciences Marines, 29280 Plouzané, France
3 : Uni Research, AS Bergen, Norway
4 : ETH Zürich, Laboratory of Ion Beam Physics, 8093 Zürich, Switzerland
5 : Cardiff University, School of Earth and Ocean Sciences, Cardiff, UK
6 : Université Bordeaux, EPOC, Avenue des Facultés, 33405 Talence, France
|Keyword(s)||consistent dating, Atlantic sediment cores, calendar age, last 40 ky, GICC05 age scale|
Rapid changes in ocean circulation and climate have been observed in marine-sediment and ice cores over the last glacial period and deglaciation, highlighting the non-linear character of the climate system and underlining the possibility of rapid climate shifts in response to anthropogenic greenhouse gas forcing. To date, these rapid changes in climate and ocean circulation are still not fully explained. One obstacle hindering progress in our understanding of the interactions between past ocean circulation and climate changes is the difficulty of accurately dating marine cores. Here, we present a set of 92 marine sediment cores from the Atlantic Ocean for which we have established age-depth models that are consistent with the Greenland GICC05 ice core chronology, and computed the associated dating uncertainties, using a new deposition modeling technique. This is the first set of consistently dated marine sediment cores enabling paleoclimate scientists to evaluate leads/lags between circulation and climate changes over vast regions of the Atlantic Ocean. Moreover, this data set is of direct use in paleoclimate modeling studies.
|Acknowledgments||The research leading to these results has received funding from the European Research Council under the European Union’s Seventh Framework Program (FP7/2007-2013 Grant agreement n° 339108). New 14C dates for cores EW9209-1JPC and V29-202 were funded by NSF OCE grants to DWO. FN, ES and AV acknowledge FCT funding support through project UID/Multi/04326/2019. We thank T. Garlan and P. Guyomard for having given us access to cores from the Service Hydrographique et Océanographique de la Marine. We acknowledge N. Smialkowski for help with formatting the data into text files, and L. Mauclair, L. Leroy and G. Isguder for the picking of numerous foraminifer samples for radiocarbon dating. We are grateful to S. Obrochta, E. Cortijo, E. Michel, F. Bassinot, J.C. Duplessy, and L. Labeyrie for advice and fruitful discussions. This paper is LSCE contribution 6572.|
The present set of age-depth models contains 3 text files and one pdf file per marine sediment core. The present set of age-depth models contains 3 text files and one pdf file per marine sediment core see Waelbroeck et al. Scientific Data 6, 165, doi:10.1038/s41597-019-0173-8 (2019) for details.