An East Antarctic, sub-annual resolution water isotope record from the Mount Brown South Ice core
We report high resolution measurements of the stable water isotope ratios (δ<sup>18</sup>O, δD) from the Mount Brown South ice core (MBS, 69.11<sup>°</sup> S 86.31<sup>°</sup> E). The record covers the period 873 - 2009 CE with sub-annual temporal resolution. Preliminary analyses of surface cores have shown the Mount Brown South site has relatively high annual snowfall accumulation (0.3 metres ice equivalent) with a seasonal bias toward lower snowfall during austral summer. Precipitation at the site is frequently related to intense, short term synoptic scale events from the mid-latitudes of the southern Indian Ocean. Higher snowfall regimes are associated with easterly winds, while lower snowfall regimes are associated with south-easterly winds. Isotope ratios are measured with Infra-Red Cavity Ring Down Spectroscopy, calibrated on the VSMOW/SLAP scale and reported on the MBS2023 time scale interpolated accordingly. We provide estimates for measurement precision and internal accuracy for δ<sup>18</sup>O and δD.
Authors
- Vasileios Gkinis (ORCID: https://orcid.org/0000-0002-5910-1549)
- Thea Quistgaard (ORCID: https://orcid.org/0009-0000-4051-3802)
- Anders Svensson (ORCID: https://orcid.org/0000-0002-4364-6085)
- Helle Astrid Kjær (ORCID: https://orcid.org/0000-0002-3781-9509)
- Tessa R. Vance (ORCID: https://orcid.org/0000-0001-6970-8646)
- Nerilie J. Abram (ORCID: https://orcid.org/0000-0003-1246-2344)
- Margaret Harlan (ORCID: https://orcid.org/0000-0002-5558-5312)
- Christopher Plummer
- Kerttu Maria Peensoo
- Thomas Blunier (ORCID: https://orcid.org/0000-0002-6065-7747)
- Andrew D. Moy (ORCID: https://orcid.org/0000-0002-7664-9960)
- Sarah Jackson (ORCID: https://orcid.org/0000-0003-4829-0687)
Institutions
- Australian National University (AU)
- University of Tasmania (AU)
- Oeschger Centre for Climate Change Research (CH)
- Australian Antarctic Division (AU)
- Aarhus University (DK)
- Frederiksberg Hospital (DK)
- International Council for the Exploration of the Sea (DK)
- ARC Centre of Excellence for Climate System Science (AU)
Publication Details
- Journal
- Scientific Data
- Published
- 2024-09-10
- DOI
- https://doi.org/10.1038/s41597-024-03751-w
- Citations
- 3
- Primary Topic
- Geology and Paleoclimatology Research
- Type
- article
- Field-Weighted Citation Impact
- 1.13
Funders
- Villum Fonden
- Australian Government
- European Commission
- National Research Foundation
- Danmarks Grundforskningsfond
- Novo Nordisk Fonden
- Climate Extremes
- Horizon 2020 Framework Programme
- Australian Antarctic Division