Surface processes and drivers of the snow water stable isotopic composition at Dome C, East Antarctica – a multi-dataset and modelling analysis

Ollivier, Inès; Steen-Larsen, Hans Christian; Stenni, Barbara; Arnaud, Laurent; Casado, Mathieu; Cauquoin, Alexandre; Dreossi, Giuliano; Genthon, Christophe; Minster, Bénédicte; Picard, Ghislain; Werner, Martin; Landais, Amaëlle

doi:https://doi.org/10.5194/tc-19-173-2025

Articles | Volume 19, issue 1

https://doi.org/10.5194/tc-19-173-2025

© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/tc-19-173-2025

© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 19, issue 1

Research article

|

16 Jan 2025

Research article |

| 16 Jan 2025

Surface processes and drivers of the snow water stable isotopic composition at Dome C, East Antarctica – a multi-dataset and modelling analysis

Inès Ollivier, Hans Christian Steen-Larsen, Barbara Stenni, Laurent Arnaud, Mathieu Casado, Alexandre Cauquoin, Giuliano Dreossi, Christophe Genthon, Bénédicte Minster, Ghislain Picard, Martin Werner, and Amaëlle Landais

Supplement

https://doi.org/10.5194/tc-19-173-2025-supplement

Data sets

Isotopic composition of surface and subsurface snow at Dome C, East Antarctica (2017-2021) Amaëlle Landais et al. https://doi.org/10.1594/PANGAEA.971486

Water stable isotopic composition of precipitation at Concordia Station (Dome C), East Antarctica (2017-2021) Giuliano Dreossi et al. https://doi.org/10.1594/PANGAEA.972031

Ten years of shielded ventilated atmospheric temperature observation on a 45-m tower at Dome C, East Antarctic plateau Christophe Genthon et al. https://doi.org/10.1594/PANGAEA.932512

Ten years of wind speed observation on a 45-m tower at Dome C, East Antarctic plateau Christophe Genthon et al. https://doi.org/10.1594/PANGAEA.932513

Water vapor observation at 3 m height above ground at Dome C, East Antarctic plateau (2018-2020) Christophe Genthon et al. https://doi.org/10.1594/PANGAEA.939421

Dati meteorologici della Stazione meteorologica CONCORDIA presso la Base CONCORDIA STATION (DomeC) P. Grigioni et al. https://doi.org/10.12910/DATASET2022-002

Basic and other measurements of radiation at Concordia station (2006-01 et seq) Angelo Lupi et al. https://doi.org/10.1594/PANGAEA.935421

Timeseries of shortwave and longwave radiation measurements at Dome C in Antarctica (2018-2020) Laurent Arnaud and Ghislain Picard https://doi.org/10.18709/perscido.2024.11.ds415

Model code and software

Bulk-transfer method for estimation of turbulent fluxes I. Ollivier https://doi.org/10.5281/zenodo.13833912

Snow Isotopic Signal Generator (SISG) model I. Ollivier https://doi.org/10.5281/zenodo.13833981

Short summary

The role of post-depositional processes taking place at the ice sheet's surface on the water stable isotope signal measured in polar ice cores is not fully understood. Using field observations and modelling results, we show that the original precipitation isotopic signal at Dome C, East Antarctica, is modified by post-depositional processes and provide the first quantitative estimation of their mean impact on the isotopic signal observed in the snow.