Crotti, Ilaria; Quiquet, Aurélien; Landais, Amaëlle; Stenni, Barbara; Wilson, David; Severi, Mirko; Mulvaney, Rob; Wilhelms, Frank; Barbante, Carlo; Frezzotti, Massimo (2022): A refined age model and ice rafted debris for the U1361A marine sediment core [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.941905, In: Crotti, I et al. (2022): A refined age model for the U1361A marine sediment core [dataset bundled publication]. PANGAEA, https://doi.org/10.1594/PANGAEA.941906
Always quote citation above when using data! You can download the citation in several formats below.
Abstract:
This data set displays a refined age scale for the U1361A marine sediment core (64.41°S, 143.89°E, 3,454 m water depth), recovered from the continental rise offshore of the Wilkes Subglacial Basin, during the Integrated Ocean Drilling Program (IODP) Expedition (Escutia et al. 2011). This age scale is a refined version of the age scale published in Wilson et al. 2018. Here we use the AICC2012 ice core chronology as a reference curve in order to compare the late Pleistocene sediment core data from U1361A to the TALDICE ice core record. Specifically, we refine the existing U1361A age model through the alignment of barium/aluminium (Ba/Al) ratios from XRF-scanning7 with the EDC δD record on the AICC2012 age scale. We apply a conservative tuning strategy to align the two records, using tie points (derived by visual matching) only at the mid-points of the major glacial terminations I-V. Over the interval of interest for the present study (i.e. ~100-350 ka), the new age model for core U1361 differs by only 0 to 6 ka compared to the previous age model in which the sedimentation rate was assumed to be constant. The Nd and IBRD (ice rafted debris) and 143 Nd/144 Nd records for the U1361A published in Wilson et al. (2018) are drawn on the refined age scale.
Supplement to:
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:
Bazin, Lucie; Landais, Amaëlle; Lemieux-Dudon, Bénédicte; Toyé Mahamadou Kele, H; Veres, Daniel; Parrenin, Frédéric; Martinerie, Patricia; Ritz, Catherine; Capron, Emilie; Lipenkov, Vladimir Ya; Loutre, Marie-France; Raynaud, Dominique; Vinther, Bo Møllesøe; Svensson, Anders M; Rasmussen, Sune Olander; Severi, Mirko; Blunier, Thomas; Leuenberger, Markus Christian; Fischer, Hubertus; Masson-Delmotte, Valerie; Chappellaz, Jérôme A; Wolff, Eric William (2013): An optimized multi-proxy, multi-site Antarctic ice and gas orbital chronology (AICC2012): 120-800 ka. Climate of the Past, 9(4), 1715-1731, https://doi.org/10.5194/cp-9-1715-2013
Escutia Dotti, Carlota; Brinkhuis, Henk; Klaus, Adam; Expedition 318 Scientists (2011): Proceedings of the Integrated Ocean Drilling Program. Washington, DC (Integrated Ocean Drilling Program Management International, Inc.), 318, https://doi.org/10.2204/iodp.proc.318.101.2011
Wilson, David J; Bertram, Rachel A; Needham, Emma F; Welsh, Kevin; McKay, Robert M; Mazumder, Anannya; Riesselman, Christina R; Jiménez-Espejo, Francisco Jose; Escutia, Carlota (2018): Ice loss from the East Antarctic Ice Sheet during late Pleistocene interglacials. Nature, 561(7723), 383-386, https://doi.org/10.1038/s41586-018-0501-8
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
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
Coverage:
Latitude: -64.409547 * Longitude: 143.886653
Minimum DEPTH, sediment/rock: 0.05 m * Maximum DEPTH, sediment/rock: 8.85 m
Event(s):
318-U1361A * Latitude: -64.409547 * Longitude: 143.886653 * Elevation: -3465.5 m * Recovery: 338.86 m * Campaign: Exp318 (Wilkes Land) * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 41 cores; 388 m cored; 87 % recovered; 0 m drilled; 388 m penetrated
Comment:
IBRD was measured by weighing after wet-sieving
IBRD (ire rafted debris) and 143Nd/144Nd records of the U1361A sediment core (Wilson et al. 2018) drawn of the refined age scale tuned on the AICC2012 chronology for EDC (Bazin et al. 2013)
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | DEPTH, sediment/rock | Depth sed | m | Crotti, Ilaria | Geocode – U1361A | |
| 2 | Age model | Age model | ka | Crotti, Ilaria | U1361A | |
| 3 | Ice rafted debris | IRD | % | Crotti, Ilaria | wt 250 mm-2 mm |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
194 data points