The Antarctic Ice Core Chronology 2023 (AICC2023) chronological framework and associated timescale for the European Project for Ice Coring in Antarctica (EPICA) Dome C ice core

Abstract δ 18 atm, δ O 2/N 2 and total air content (TAC) records are poorly resolved and show large gaps over the last 800 kyr, and (2) large uncertainties are associated with their orbital targets. Here, we present new highly resolved δ 18 atm, δ O 2/N 2 and δ 15 81 Kr ages. We have compiled chronological and glaciological information including novel orbital age markers from new data on the EDC ice core as well as accurate firn modeling estimates in a Bayesian dating tool to construct the new AICC2023 chronology. For the first time, three orbital tools are used simultaneously. Hence, it is possible to observe that they are consistent with each other and with the other age markers over most of the last 800 kyr (70 %). This, in turn, gives us confidence in the new AICC2023 chronology. The average uncertainty in the ice chronology is reduced from 1700 to 900 years in AICC2023 over the last 800 kyr (1 σ). The new timescale diverges from AICC2012 and suggests age shifts reaching 3800 years towards older ages over marine isotope stages (MISs) 5, 11 and 19. But the coherency between the new AICC2023 timescale and independent chronologies of other archives (Italian Lacustrine succession from Sulmona Basin, Dome Fuji ice core and northern Alpine speleothems) is improved by 1000 to 2000 years over these time intervals.

Object Details

• Location: Deutsche Nationalbibliothek Frankfurt am Main
• Extent: Online-Ressource
• Language: Englisch

References and Relationships

• Bibliographic citation: The Antarctic Ice Core Chronology 2023 (AICC2023) chronological framework and associated timescale for the European Project for Ice Coring in Antarctica (EPICA) Dome C ice core ; volume:19 ; number:11 ; year:2023 ; pages:2257-2286 ; extent:30 ; Climate of the past ; 19, Heft 11 (2023), 2257-2286 (gesamt 30)

Contributors, Places and Time

• Creator: Bouchet, Marie ; Landais, Amaëlle ; Grisart, Antoine ; Parrenin, Frédéric ; Prié, Frédéric ; Jacob, Roxanne ; Fourré, Elise ; Capron, Emilie ; Raynaud, Dominique ; Lipenkov, Vladimir Ya ; Loutre, Marie-France ; Extier, Thomas ; Svensson, Anders ; Legrain, Etienne ; Martinerie, Patricia ; Leuenberger, Markus Christian ; Jiang, Wei ; Ritterbusch, Florian ; Lu, Zheng-Tian ; Yang, Guo-Min

Further information

• DOI: 10.5194/cp-19-2257-2023
• URN: urn:nbn:de:101:1-2023111603274714641000
• Rights: Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
• Last update: 15.08.2025, 7:28 AM CEST