An age scale for the first shallow (Sub-)antarctic ice core from young island, northwest ross sea

Dorothea Elisabeth Moser; Sarah Jackson; Helle Astrid Kjær; Bradley Markle; Estelle Ngoumtsa; Joel B. Pedro; Delia Segato; Andrea Spolaor; Dieter Tetzner; Paul Vallelonga; Elizabeth R. Thomas

doi:10.3390/geosciences11090368

An age scale for the first shallow (Sub-)antarctic ice core from young island, northwest ross sea

Dorothea Elisabeth Moser^*, Sarah Jackson, Helle Astrid Kjær, Bradley Markle, Estelle Ngoumtsa, Joel B. Pedro, Delia Segato, Andrea Spolaor, Dieter Tetzner, Paul Vallelonga, Elizabeth R. Thomas

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

7 Citations (Scopus)

Abstract

The climate of the sub-Antarctic is important in understanding the environmental conditions of Antarctica and the Southern Ocean. However, regional climate proxy records from this region are scarce. In this study, we present the stable water isotopes, major ion chemistry, and dust records from the first ice core from the (sub-)Antarctic Young Island. We present and discuss various dating approaches based on commonly used ice core proxies, such as stable water isotopes and seasonally deposited ions, together with site-specific characteristics such as melt layers. The dating approaches are compared with estimated precipitation rates from reanalysis data (ERA5) and volcanic cryptotephra shards likely presenting an absolute tie point from a 2001 CE eruption on neighboring Sturge Island. The resulting ice core age scale spans the period 2016 to 1995, with an uncertainty of ±2 years.

Original language	English
Article number	368
Journal	Geosciences (Switzerland)
Volume	11
Issue number	9
DOIs	https://doi.org/10.3390/geosciences11090368
Publication status	Published - Sept 2021

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title = "An age scale for the first shallow (Sub-)antarctic ice core from young island, northwest ross sea",

abstract = "The climate of the sub-Antarctic is important in understanding the environmental conditions of Antarctica and the Southern Ocean. However, regional climate proxy records from this region are scarce. In this study, we present the stable water isotopes, major ion chemistry, and dust records from the first ice core from the (sub-)Antarctic Young Island. We present and discuss various dating approaches based on commonly used ice core proxies, such as stable water isotopes and seasonally deposited ions, together with site-specific characteristics such as melt layers. The dating approaches are compared with estimated precipitation rates from reanalysis data (ERA5) and volcanic cryptotephra shards likely presenting an absolute tie point from a 2001 CE eruption on neighboring Sturge Island. The resulting ice core age scale spans the period 2016 to 1995, with an uncertainty of ±2 years.",

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doi = "10.3390/geosciences11090368",

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AU - Moser, Dorothea Elisabeth

AU - Jackson, Sarah

AU - Kjær, Helle Astrid

AU - Markle, Bradley

AU - Ngoumtsa, Estelle

AU - Pedro, Joel B.

AU - Segato, Delia

AU - Spolaor, Andrea

AU - Tetzner, Dieter

AU - Vallelonga, Paul

AU - Thomas, Elizabeth R.

PY - 2021/9

Y1 - 2021/9

N2 - The climate of the sub-Antarctic is important in understanding the environmental conditions of Antarctica and the Southern Ocean. However, regional climate proxy records from this region are scarce. In this study, we present the stable water isotopes, major ion chemistry, and dust records from the first ice core from the (sub-)Antarctic Young Island. We present and discuss various dating approaches based on commonly used ice core proxies, such as stable water isotopes and seasonally deposited ions, together with site-specific characteristics such as melt layers. The dating approaches are compared with estimated precipitation rates from reanalysis data (ERA5) and volcanic cryptotephra shards likely presenting an absolute tie point from a 2001 CE eruption on neighboring Sturge Island. The resulting ice core age scale spans the period 2016 to 1995, with an uncertainty of ±2 years.

AB - The climate of the sub-Antarctic is important in understanding the environmental conditions of Antarctica and the Southern Ocean. However, regional climate proxy records from this region are scarce. In this study, we present the stable water isotopes, major ion chemistry, and dust records from the first ice core from the (sub-)Antarctic Young Island. We present and discuss various dating approaches based on commonly used ice core proxies, such as stable water isotopes and seasonally deposited ions, together with site-specific characteristics such as melt layers. The dating approaches are compared with estimated precipitation rates from reanalysis data (ERA5) and volcanic cryptotephra shards likely presenting an absolute tie point from a 2001 CE eruption on neighboring Sturge Island. The resulting ice core age scale spans the period 2016 to 1995, with an uncertainty of ±2 years.

KW - (sub-)Antarctic island

KW - Age scale

KW - Melting

KW - Proxies

KW - Shallow ice core

UR - http://www.scopus.com/inward/record.url?scp=85114463950&partnerID=8YFLogxK

U2 - 10.3390/geosciences11090368

DO - 10.3390/geosciences11090368

M3 - Article

SN - 2076-3263

VL - 11

JO - Geosciences (Switzerland)

JF - Geosciences (Switzerland)

IS - 9

M1 - 368

ER -

An age scale for the first shallow (Sub-)antarctic ice core from young island, northwest ross sea

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