Climate of the Past
Climate of the Past
CP
Articles | Volume 21, issue 1
Articles | Volume 21, issue 1
https://doi.org/10.5194/cp-21-145-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/cp-21-145-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 21, issue 1
Research article
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21 Jan 2025
Research article | Highlight paper |  | 21 Jan 2025

East Antarctic Ice Sheet variability in the central Transantarctic Mountains since the mid Miocene

Gordon R. M. Bromley, Greg Balco, Margaret S. Jackson, Allie Balter-Kennedy, and Holly Thomas

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Understanding the stability of the Antarctic ice sheet during the Pliocene has important implications to future Antarctic ice sheet changes and sea level. However, changes in the eastern Antarctic ice sheet are still largely unknown. This work may provide key geological evidence to fill in this knowledge gap.
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Short summary
We constructed a geologic record of East Antarctic Ice Sheet thickness from deposits at Otway Massif to directly assess how Earth's largest ice sheet responds to warmer-than-present climate. Our record confirms the long-term dominance of a cold polar climate but lacks a clear ice sheet response to the mid-Pliocene Warm Period, a common analogue for the future. Instead, an absence of moraines from the late Miocene–early Pliocene suggests the ice sheet was less extensive than present at that time.
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