An East Antarctic, sub-annual resolution water isotope record from the Mount Brown South Ice core

Vasileios Gkinis; Sarah Jackson; Nerilie J. Abram; Christopher Plummer; Thomas Blunier; Margaret Harlan; Helle Astrid Kjær; Andrew D. Moy; Kerttu Maria Peensoo; Thea Quistgaard; Anders Svensson; Tessa R. Vance

doi:10.1038/s41597-024-03751-w

An East Antarctic, sub-annual resolution water isotope record from the Mount Brown South Ice core

Vasileios Gkinis^*, Sarah Jackson, Nerilie J. Abram, Christopher Plummer, Thomas Blunier, Margaret Harlan, Helle Astrid Kjær, Andrew D. Moy, Kerttu Maria Peensoo, Thea Quistgaard, Anders Svensson, Tessa R. Vance

^*Corresponding author af dette arbejde

Institut for Miljøvidenskab - Atmosfæriske Emissioner og Modellering

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avis › Tidsskriftartikel › Forskning › peer review

Abstract

We report high resolution measurements of the stable water isotope ratios (δ¹⁸O, 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 δ¹⁸O and δD.

Originalsprog	Engelsk
Artikelnummer	986
Tidsskrift	Scientific Data
Vol/bind	11
Nummer	1
ISSN	2052-4463
DOI	https://doi.org/10.1038/s41597-024-03751-w
Status	Udgivet - dec. 2024

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title = "An East Antarctic, sub-annual resolution water isotope record from the Mount Brown South Ice core",

abstract = "We report high resolution measurements of the stable water isotope ratios (δ18O, 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 δ18O and δD.",

author = "Vasileios Gkinis and Sarah Jackson and Abram, {Nerilie J.} and Christopher Plummer and Thomas Blunier and Margaret Harlan and Kj{\ae}r, {Helle Astrid} and Moy, {Andrew D.} and Peensoo, {Kerttu Maria} and Thea Quistgaard and Anders Svensson and Vance, {Tessa R.}",

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AU - Gkinis, Vasileios

AU - Jackson, Sarah

AU - Abram, Nerilie J.

AU - Plummer, Christopher

AU - Blunier, Thomas

AU - Harlan, Margaret

AU - Kjær, Helle Astrid

AU - Moy, Andrew D.

AU - Peensoo, Kerttu Maria

AU - Quistgaard, Thea

AU - Svensson, Anders

AU - Vance, Tessa R.

PY - 2024/12

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N2 - We report high resolution measurements of the stable water isotope ratios (δ18O, 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 δ18O and δD.

AB - We report high resolution measurements of the stable water isotope ratios (δ18O, 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 δ18O and δD.

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SN - 2052-4463

VL - 11

JO - Scientific Data

JF - Scientific Data

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An East Antarctic, sub-annual resolution water isotope record from the Mount Brown South Ice core

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