Consistently dated Atlantic sediment cores over the last 40 thousand years
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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.
Waelbroeck , C , Lougheed , B C , Vazquez Riveiros , N , Missiaen , L , Pedro , J , Dokken , T , Hajdas , I , Wacker , L , Abbott , P , Dumoulin , J-P , Thil , F , Eynaud , F , Rossignol , L , Fersi , W , Albuquerque , A L , Arz , H , Austin , W E N , Came , R , Carlson , A E , Collins , J A , Dennielou , B , Desprat , S , Dickson , A , Elliot , M , Farmer , C , Giraudeau , J , Gottschalk , J , Henderiks , J , Hughen , K , Jung , S , Knutz , P , Lebreiro , S , Lund , D C , Lynch-Stieglitz , J , Malaizé , B , Marchitto , T , Martínez-Méndez , G , Mollenhauer , G , Naughton , F , Nave , S , Nürnberg , D , Oppo , D , Peck , V , Peeters , F J C , Penaud , A , Portilho-Ramos , R D C , Repschläger , J , Roberts , J , Rühlemann , C , Salgueiro , E , Sanchez Goni , M F , Schönfeld , J , Scussolini , P , Skinner , L C , Skonieczny , C , Thornalley , D , Toucanne , S , Rooij , D V , Vidal , L , Voelker , A H L , Wary , M , Weldeab , S & Ziegler , M 2019 , ' Consistently dated Atlantic sediment cores over the last 40 thousand years ' , Scientific Data , vol. 6 , 165 . https://doi.org/10.1038/s41597-019-0173-8
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DescriptionThe 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.
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