Climate of the Past
Climate of the Past
CP
Articles | Volume 20, issue 7
Articles | Volume 20, issue 7
https://doi.org/10.5194/cp-20-1437-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
Special issue:
https://doi.org/10.5194/cp-20-1437-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 20, issue 7
Research article
 | 
08 Jul 2024
Research article |  | 08 Jul 2024

Evaluating marine dust records as templates for optical dating of Oldest Ice

Jessica Ng, Jeffrey Severinghaus, Ryan Bay, and Delia Tosi

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Short summary
The pattern of Earth’s ice age cycles shifted around a million years ago, becoming more extreme and longer in duration. Multiple projects are underway to obtain an Antarctic ice core that covers this time period, as ice cores contain important clues to why the transition happened. To make sure the ice is old enough at the bottom, we demonstrate how to use new technology to quickly measure dust patterns in the ice and compare them to dust in deep-ocean sediments whose ages are known.
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Oldest Ice: finding and interpreting climate proxies in ice...