- 1Université Grenoble Alpes, Institut des Géosciences de l’Environnement, Glaciology, Saint-Martin-d'Hères, France
- *A full list of authors appears at the end of the abstract
The International Partnership on Ice Core Science (IPICS) set the “Oldest Ice” challenge of retrieving an ice core with a continuous palaeoclimatic record covering the past 1 million years. In order to determine good ice core drill sites, flow modelling is required to assess the potential age of the ice. Different age models were applied to the Beyond EPICA drill site on Little Dome C in East Antarctica. During the 2024/2025 Antarctic field season, drilling reached bedrock and the preliminary measurements from the field suggest the age of the oldest ice to be over 1.2 million years.
In this work, we compare age-depth tie points observations to both 1D and 2.5D ice flow models. The comparison shows how different models using different constraining radar surveys performed when compared with observations from the ice core. We also discuss why a simpler model may be more appropriate in the Dome C region. This validation exercise is of special interest to other ice core drilling projects where these modelling techniques have been used and for searching for new potential “Oldest Ice” drill sites.
Frédéric Parrenin frederic.parrenin@univ-grenoble-alpes.fr 1 Frank Wilhelms frank.wilhelms@awi.de 2 3 Julien Westhoff julien.westhoff@nbi.ku.dk 4 Olivier Alemany olivier.alemany@univ-grenoble-alpes.fr 1 Steffen Bo Hansen sbh@nbi.ku.dk 4 Dorthe Dahl-Jensen ddj@nbi.ku.dk 4 5 Hubertus Fischer hubertus.fischer@climate.unibe.ch 6 Amaelle Landais amaelle.landais@lsce.ipsl.fr 7 Carlo Barbante barbante@unive.it 8 9 Lisa Ardoin lisa.ardoin@ulb.be 10 Melanie Behrens Melanie.Behrens@awi.de 2 Gianluca Bianchi Fasani gianluca.bianchifasani@enea.it 11 Nicolas Bienville nicolas.bienville@lsce.ipsl.fr 7 Marie Bouchet marie.bouchet@lsce.ipsl.fr 7 Grant Boeckmann grant.boeckmann@nbi.ku.dk 4 Andrea Ceinini andreaceinini@gmail.com 12 Giuditta Celli giuditta.celli@unive.it 9 Danilo Collino macotia@gmail.com 12 Rémi Dallmayr remi.dallmayr@awi.de 2 Andrea De Vito devitoandrea1993@libero.it 12 Giuliano Dreossi giuliano.dreossi@unive.it 9 Romain Duphil Romain.duphil@univ-grenoble-alpes.fr 1 Olaf Eisen olaf.eisen@awi.de 2 13 Inès Gay gay.ines@gmail.com 14 Tamara Gerber tamara.gerber@unil.ch 4 Vasileios Gkinis v.gkinis@nbi.ku.dk 4 Markus Grimmer markus.grimmer@climate.unibe.ch 6 Romilly Harris-Stuart romilly.harris-stuart@lsce.ipsl.fr 7 Maria Hörhold maria.hoerhold@awi.de 2 Matthias Hüther matthias.huether@awi.de 2 Fortunat Joos fortunat.joos@unibe.ch 6 Iben Koldtoft koldtoft@nbi.ku.dk 4 Florian Krauß florian.krauss@climate.unibe.ch 6 Manuela Krebs mjkrabbe@gmail.com 2 Thom Laepple Thomas.Laepple@awi.de 2 Gunther Lawer gunther.lawer@it-wizards.de 2 Johannes Lemburg johannes@lemburg.net 2 Martin Leonhardt martinleonhardt@icloud.com 2 Hanno Meyer Hanno.Meyer@awi.de 2 Bénédicte Minster Benedicte.Minster@lsce.ipsl.fr 7 Michaela Mühl michaela.muehl@unibe.ch 6 Robert Mulvaney rmu@bas.ac.uk 15 Saverio Panichi saverio.panichi@enea.it 12 Philippe Possenti Philippe.possenti@univ-grenoble-alpes.fr 1 Catherine Ritz catherine.ritz@univ-grenoble-alpes.fr 1 Michele Scalet simonitiziana@libero.it 12 Federico Scoto federico.scoto@unive.it 9 16 Barbara Seth barbara.seth@unibe.ch 6 Lison Soussaintjean lison.soussaintjean@unibe.ch 6 Hans Christian Steen-Larsen Hans.Christian.Steen-Larsen@uib.no 17 Barbara Stenni barbara.stenni@unive.it 9 James Veale jamle@bas.ac.uk 15 Ilka Weikusat Ilka.Weikusat@awi.de 2 18 Eric Wolff ew428@cam.ac.uk 19 Daniele Zannoni daniele.zannoni@unive.it 9
How to cite: Chung, A. and the Beyond EPICA community: How accurate was the age modelling for the Beyond EPICA ice core?, EGU General Assembly 2025, Vienna, Austria, 27 Apr–2 May 2025, EGU25-17165, https://doi.org/10.5194/egusphere-egu25-17165, 2025.
