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Crotti, Ilaria; Quiquet, Aurélien; Landais, Amaëlle; Stenni, Barbara; Wilson, David; Severi, Mirko; Mulvaney, Rob; Wilhelms, Frank; Barbante, Carlo; Frezzotti, Massimo (2022): TALDICE high resolution measurements of ssNa+ fluxes for MIS 7.5 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.941851, In: Crotti, I et al. (2022): TALDICE high resolution measurements of d18O, d-excess and ssNa+ fluxes for MIS 5.5, MIS 7.5 and MIS 9.3 [dataset bundled publication]. PANGAEA, https://doi.org/10.1594/PANGAEA.941857

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Abstract:
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).
Keyword(s):
Antarctica; Ice core; isotopes
Supplement to:
Crotti, Ilaria; Quiquet, Aurélien; Landais, Amaëlle; Stenni, Barbara; Wilson, David; Severi, Mirko; Mulvaney, Robert; Wilhelms, Frank; Barbante, Carlo; Frezzotti, Massimo (in review): Response of the Wilkes Subglacial Basin Ice Sheet to Southern Ocean Warming During Late Pleistocene Interglacials. https://doi.org/10.21203/rs.3.rs-1174987/v1
Crotti, Ilaria; Quiquet, Aurélien; Landais, Amaëlle; Stenni, Barbara; Wilson, David J; Severi, Mirko; Mulvaney, Robert; Wilhelms, Frank; Barbante, Carlo; Frezzotti, Massimo (2022): Wilkes subglacial basin ice sheet response to Southern Ocean warming during late Pleistocene interglacials. Nature Communications, 13(1), 5328, https://doi.org/10.1038/s41467-022-32847-3
Further details:
Crotti, Ilaria; Landais, Amaëlle; Stenni, Barbara; Bazin, Lucie; Parrenin, Frédéric; Frezzotti, Massimo; Ritterbusch, Florian; Lu, Zheng-Tian; Jiang, Wei; Yang, Guo-Min; Fourré, Elise; Orsi, Anaïs; Jacob, Roxanne; Minster, Bénédicte; Prié, Frédéric; Dreossi, Giuliano; Barbante, Carlo (2021): An extension of the TALDICE ice core age scale reaching back to MIS 10.1. Quaternary Science Reviews, 266, 107078, https://doi.org/10.1016/j.quascirev.2021.107078
Funding:
European Research Council (ERC), grant/award no. 817493: ICORDA - Ice CORe DAting tools revisited to infer the dynamic of glacial – interglacial transitions over the last 1.5 million years
Ministry of Education, Universities and Research (MIUR), grant/award no. PNRA18_00098: TALDEEP
Natural Environment Research Council (NERC), grant/award no. NE/T011440/1: ISO-THERM: Isotopic testing of Earth's weathering thermostat
SCOR Corporate Foundation for Science (SCOR), grant/award no. COASTRISK: COASTRISK: Assessing future risks faced by assets in global coastal areas, to determine viable adaptation investments under extreme sea level rise scenarios
Università Italo Francese (UIF), grant/award no. C2-1017: Vinci Scholarship
Coverage:
Latitude: -72.783330 * Longitude: 159.066670
Date/Time Start: 2005-01-01T00:00:00 * Date/Time End: 2008-12-31T00:00:00
Minimum DEPTH, ice/snow: 1521.81 m * Maximum DEPTH, ice/snow: 1524.54 m
Event(s):
TALDICE (Talos Dome) * Latitude: -72.783330 * Longitude: 159.066670 * Date/Time Start: 2005-01-01T00:00:00 * Date/Time End: 2008-12-31T00:00:00 * Elevation: 2315.0 m * Recovery: 89 m * Location: Antarctica * Method/Device: Electromechanical drill (EMD)
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1 DEPTH, ice/snowDepth ice/snowmCrotti, IlariaGeocode – TALDICE, MIS 7.5
2 Ice ageIce ageka BPCrotti, IlariaTALDICE deep1, MIS 7.5
3 Sodium, sea-salt, fluxssNa fluxmg/m2/aCrotti, IlariaMIS 7.5
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
70 data points

Data

Download dataset as tab-delimited text — use the following character encoding:

1 
Depth ice/snow [m]		2 
Ice age [ka BP]		3 
ssNa flux [mg/m2/a]
1521.81243.01639.633
1521.88243.11580.426
1521.96243.24220.331
1522.04243.36375.048
1522.12243.50503.582
1522.21243.63396.784
1522.29243.75476.214
1522.38243.880.000
1522.46244.02506.763
1522.54244.15701.581
1522.62244.28699.933
1522.71244.43371.377
1522.79244.56645.117
1522.87244.70767.794
1522.96244.85676.996
1523.04245.00194.692
1523.12245.14949.599
1523.19245.26630.132
1523.27245.41835.686
1523.35245.56748.417
1523.42245.69734.984
1523.50245.85723.243
1523.58246.00509.419
1523.65246.14563.679
1523.73246.30664.152
1523.81246.46467.056
1523.88246.61712.408
1523.96246.77249.506
1524.04246.94769.025
1524.12247.11994.588
1524.21247.311019.249
1524.29247.491005.598
1524.37247.671179.544
1524.46247.881135.794
1524.54248.071186.549