TALDICE high resolution measurements of ssNa+ fluxes for MIS 7.5

DOI

The data here described are presented in the submitted paper Response of the Wilkes Subglacial Basin Ice Sheet to Southern Ocean Warming During Late Pleistocene Interglacials by Crotti et al. This data set includes new high resolution measurements of d-excess, d18O and ssNa+ for the Antarctic TALDICE ice core (Latitude: -72.783330, Longitude: 159.066670, Elevation: 2315.0 m). The new data set covers the interglacials periods of MIS 5.5, MIS 7.5 and MIS 9.3 (1486 m depth - 1548 m depth). The data are drawn on the TALDICE deep1 chronology (Crotti et al. 2021). The d-excess (d = δD − 8 × δ18O) (permill) record covers the periods MIS 5.5 , MIS 7.5 and 9.3 MIS is at 5 cm resolution and spans the following age-depths intervals:• MIS 5.5. Between 1378.5 and 1421.65 m depth, 110-135 ka • MIS 7.5. Between 1521.85 and 1524.5 m depth, 243-248 ka • MIS 9.3. Between 1541.80 and 1547.90 m depth, 320-343 ka The d18O record (permill) covers the periods MIS 5.5 , MIS 7.5 and 9.3 MIS is at 5 cm resolution and spans the following age-depths intervals:• MIS 7.5. Between 1521.85 and 1524.5 m depth, 243-248 ka• MIS 9.3. Between 1541.80 and 1547.90 m depth, 320-343 ka The ssNa+ fluxes record covers the periods MIS 5.5 , MIS 7.5 and 9.3 MIS is at 8 cm resolution and pans the following age-depths intervals: • MIS 7.5. Between 1521.81 and 1524.54 m depth, 243-248 ka • MIS 9.3. Between 1541.73 and 1547.96 m depth, 320-343 ka The d18O and dD (non presented here) to calculate the d-excess were analysed in Italy (University of Venice) and France (LSCE) using the Cavity Ring Down Spectroscopy (CRDS) technique. Analyses were performed using a Picarro isotope water analyser (L2130-i version for both laboratories). The data were calibrated using a three-point linear calibration with three lab-standards that were themselves calibrated versus Standard Mean Ocean Water (SMOW). The average precision for the δ18O and δD measurements is 0.1 and 0.7 ‰, respectively. The concentrations of ssNa+ were measured on TALDICE ice samples at 8 cm resolution by classical ion chromatography on discrete samples collected using a melting device connected to an auto-sampler for the MIS 7.5 and MIS 9.3 whereas Continuous Flow Analysis (CFA) was applied for MIS 5.5 samples. The total deposition ssNa+ flux was calculated multiplying the measured ice concentration of ssNa+ by the reconstructed accumulation rate. The accumulation rates were derived from the accumulation rates were obtained from the TALDICE deep1 age scale (Crotti et al. 2021).

Identifier
DOI https://doi.org/10.1594/PANGAEA.941851
Related Identifier https://doi.org/10.1594/PANGAEA.941857
Related Identifier https://doi.org/10.21203/rs.3.rs-1174987/v1
Related Identifier https://doi.org/10.1038/s41467-022-32847-3
Related Identifier https://doi.org/10.1016/j.quascirev.2021.107078
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.941851
Provenance
Creator Crotti, Ilaria; Quiquet, Aurélien; Landais, Amaelle; Stenni, Barbara; Wilson, David; Severi, Mirko; Mulvaney, Rob; Wilhelms, Frank; Barbante, Carlo; Frezzotti, Massimo
Publisher PANGAEA
Publication Year 2022
Funding Reference European Research Council, 817493; Ministry of Education, Universities and Research, PNRA18_00098; Natural Environment Research Council, NE T011440 1; SCOR Corporate Foundation for Science, COASTRISK; Università Italo Francese, C2 1017
Rights Creative Commons Attribution 4.0 International; https://creativecommons.org/licenses/by/4.0/
OpenAccess true
Representation
Language English
Resource Type Dataset
Format text/tab-separated-values
Size 70 data points
Discipline Earth System Research
Spatial Coverage (159.067 LON, -72.783 LAT); Antarctica
Temporal Coverage Begin 2005-01-01T00:00:00Z
Temporal Coverage End 2008-12-31T00:00:00Z