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This text file contains the complete experimental dataset. Data for each experiment listed in Table 1 appear as columns of displacement (mm) and coefficient of friction (mu). Acquired raw torque and normal force data were processed to obtain shear stress and normal stress measurements respectively. The externally measured torque was corrected for fluid pressure and shear displacement-dependent friction of the Teflon-coated O-ring seals using calibration values obtained in runs with a dummy sample of carbon-coated PolyEtherEtherKeton with a known sliding friction; seal friction is typically around 0.03 kN (equivalent to ~1.5 MPa shear stress). The contribution of the Molykote-coated confining rings to the measured friction is negligible (see also den Hartog et al., 2012). The applied normal stress was corrected for the stress supported by the internal seals, the level of which is clearly visible during initial loading and was generally around 0.5 kN (equivalent to ~2 MPa normal stress acting on the sample). Repeat experiments (u644 and u713) on sample 181-1124C-44X-7, 4-6 cm (428.34 mbsf), yielded an analytical error of 0.03-0.05 mu. The analytical error is thought to reflect the fact that the second experiment was performed on the last remaining sample powder, which may have had more fine-grained clays (e.g., sample inter-variability), and/or because of variations in sample preparation.

Details on the grain and extant of the study.

We provide a compilation of downward fluxes (total mass, POC, PON, BSiO2, CaCO3, PIC and lithogenic/terrigenous fluxes) from over 6000 sediment trap measurements distributed in the Atlantic Ocean, from 30 degree North to 49 degree South, and covering the period 1982-2011. Data from the Mediterranean Sea are also included. Data were compiled from different sources: data repositories (BCO-DMO, PANGAEA), time series sites (BATS, CARIACO), published scientific papers and/or personal communications from PI's. All sources are specifed in the data set. Data from the World Ocean Atlas 2009 were extracted to provide each flux observation with contextual environmental data, such as temperature, salinity, oxygen (concentration, AOU and percentage saturation), nitrate, phosphate and silicate. The research leading to these results received (partial) funding from the European Commission FP7 EURO-BASIN (European Basin-Scale Anal ysis, Synthesis, and Integration; Grant Agreement 264 933).The other version of the data set is identically to the data table strucure describted in the ESSD paper but bother version contain the same amount of data.