Climate of the Past
Climate of the Past
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Articles | Volume 21, issue 5
Articles | Volume 21, issue 5
https://doi.org/10.5194/cp-21-897-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/cp-21-897-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 21, issue 5
Research article
 | 
16 May 2025
Research article |  | 16 May 2025

Evaluating the 20th Century Reanalysis Version 3 with synoptic typing and an East Antarctic ice core accumulation record

Max T. Nilssen, Danielle G. Udy, and Tessa R. Vance

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Short summary
Reanalyses can be used to study past weather and climate, but their reliability is uncertain in data-sparse regions, such as the southern Indian Ocean. We used weather typing and an ice core record from East Antarctica to show that the 20th Century Reanalysis project can better represent the weather conditions that lead to snowfall variability at the ice core site when key weather observations from the Southern Ocean (e.g. Macquarie Island) commence around the mid-20th century.
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