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An East Antarctic, sub-annual resolution water isotope record from the Mount Brown South Ice core
- Source :
- Scientific Data, Vol 11, Iss 1, Pp 1-16 (2024)
- Publication Year :
- 2024
- Publisher :
- Nature Portfolio, 2024.
-
Abstract
- Abstract We report high resolution measurements of the stable water isotope ratios (δ 18O, δD) from the Mount Brown South ice core (MBS, 69.11° S 86.31° 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 18O and δD.
- Subjects :
- Science
Subjects
Details
- Language :
- English
- ISSN :
- 20524463 and 69026971
- Volume :
- 11
- Issue :
- 1
- Database :
- Directory of Open Access Journals
- Journal :
- Scientific Data
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.4e3140834ff74a8c9df4f690269715f6
- Document Type :
- article
- Full Text :
- https://doi.org/10.1038/s41597-024-03751-w