The Cryosphere
The Cryosphere
TC
Articles | Volume 19, issue 6
Articles | Volume 19, issue 6
https://doi.org/10.5194/tc-19-2247-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/tc-19-2247-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 19, issue 6
Research article
 | 
26 Jun 2025
Research article |  | 26 Jun 2025

Antarctic subglacial trace metal mobility linked to climate change across termination III

Gavin Piccione, Terrence Blackburn, Paul Northrup, Slawek Tulaczyk, and Troy Rasbury

Supplement

https://doi.org/10.5194/tc-19-2247-2025-supplement

Data sets

U-series Geochronology, Isotope, and Elemental Geochemistry of a Subglacial Precipitate that Formed Across Termination III G. Piccione https://doi.org/10.15784/601781

Model code and software

Simplified model of thermal energy balance beneath the Antarctic ice sheet G. Piccione and S. Tulaczyk https://doi.org/10.5281/zenodo.11126839

Modeled Antarctic subglacial iron discharge across glacial termination III G. Piccione https://doi.org/10.5281/zenodo.11126883

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Short summary
Growth of microorganisms in the Southern Ocean is limited by low iron levels. Iron delivered from beneath the Antarctic Ice Sheet is one agent that fertilizes these ecosystems, but it is unclear how this nutrient source changes through time. Here, we measured the age and chemistry of a rock that records the iron concentration of Antarctic basal water. We show that increased dissolution of iron from rocks below the ice sheet can substantially enhance iron discharge during cold climate periods.
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