The Cryosphere
The Cryosphere
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Articles | Volume 19, issue 10
Articles | Volume 19, issue 10
https://doi.org/10.5194/tc-19-4525-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/tc-19-4525-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 19, issue 10
Brief communication
 | 
14 Oct 2025
Brief communication |  | 14 Oct 2025

Brief communication: Reanalyses underperform in cold regions, raising concerns for climate services and research

Bin Cao and Stephan Gruber

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Short summary
The climate-driven changes in cold regions have an outsized importance for local resilient communities and for global climate through teleconnections. We show that reanalyses are less accurate in cold regions compared to other more populated regions, coincident with the low density of observations. Our findings likely point to similar gaps in our knowledge and capabilities of climate research and services in cold regions.
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