Sortable silt data from core MD03-2673

Geochemical ratio ln(Zr/Rb) and grain-size proxies (Sortable Silt) datasets of cores MD03-2679 and MD03-2673 located in North Atlantic. XRF data were obtained every cm with a Avaatech 4th generation at the Laboratoire des Sciences du Climat et de l'Environnement (LSCE) . Grain-size data were obtained with a Malvern Mastersizer 2000 and a Malvern Mastersizer 3000 at GEOsciences Paris-Sud (GEOPS) and at Bio-Indicateurs Actuels et Fossiles (BIAF) labs, respectively. These data allow to reconstruct past change of Iceland-Scotland Overflow Water (ISOW) strength

Geochemical ratio ln(Zr/Rb) from core MD03-2679

The geochemical ratio ln(Zr/Rb) was analyzed in the core MD03-2679 located in the North Atlantic. The geochemical proxy ln(Zr/Rb) is used as grain-size proxy free of ice-rafted debris (IRD) influence. The X-ray fluorescence (XRF) data were obtained every cm with a Avaatech core scanner, 4th generation, at the Laboratoire des Sciences du Climat et de l'Environnement (LSCE). The data were calibrated using the Multivariate Log-ratio Calibration (MLC) developed by Weltje et al. (2015) by analyzing discrete samples with a PANalytical Epsilon XRF spectrometer. These data were used as reference for grain-size variability free of IRD influence in Stevenard et al. (submitted)

Geochemical ratio ln(Zr/Rb) from core MD03-2673

Geochemical ratio ln(Zr/Rb) and grain-size proxies (Sortable Silt) datasets of cores MD03-2679 and MD03-2673 located in North Atlantic. XRF data were obtained every cm with a Avaatech 4th generation at the Laboratoire des Sciences du Climat et de l'Environnement (LSCE) . Grain-size data were obtained with a Malvern Mastersizer 2000 and a Malvern Mastersizer 3000 at GEOsciences Paris-Sud (GEOPS) and at Bio-Indicateurs Actuels et Fossiles (BIAF) labs, respectively. These data allow to reconstruct past change of Iceland-Scotland Overflow Water (ISOW) strength

Sortable silt data from core MD03-2679

Geochemical ratio ln(Zr/Rb) and grain-size proxies (Sortable Silt) datasets of cores MD03-2679 and MD03-2673 located in North Atlantic. XRF data were obtained every cm with a Avaatech 4th generation at the Laboratoire des Sciences du Climat et de l'Environnement (LSCE) . Grain-size data were obtained with a Malvern Mastersizer 2000 and a Malvern Mastersizer 3000 at GEOsciences Paris-Sud (GEOPS) and at Bio-Indicateurs Actuels et Fossiles (BIAF) labs, respectively. These data allow to reconstruct past change of Iceland-Scotland Overflow Water (ISOW) strength

Variations in the strength of the North Atlantic bottom water during Holocene

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(Table 1) Age determination of sediment cores MD925-2002 and MD03-2690

The compilation of results obtained on three giant piston cores from the Whittard, Shamrock and Guilcher turbidite levees reveals a high-resolution stratigraphic record for the Bay of Biscay. Due to the abundance of reworked sediments in these sedimentary environments, a specific methodological approach, based on an X-ray-assisted subsampling phase associated with sedimentological, geochemical and micropalaeontological analyses, was implemented. With an accurate chronological framework, this multi-proxy investigation provides observations on the 'Fleuve Manche' palaeoriver and the British-Irish Ice Sheet (BIS) histories over the last 20,000 years. The results obtained highlight the direct influence of the decay of the BIS on the Bay of Biscay deep-sea clastic sedimentation during the last European deglacial phase. During this period, the annual BIS cycle of meltwater seems enough to generate seasonal turbidity currents associated with exceptional sedimentation rates in all the Celtic and Armorican turbidite systems. With very high sedimentation rates, the turbidite levees represent the main deep-sea clastic depositional area. Long coring combined with a very careful subsampling method can provide continuous high-resolution palaeoenvironmental signals

The impact of the last European deglaciation on the deep-sea turbidite systems of the Celtic-Armorican margin (Bay of Biscay)

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