The Cryosphere
The Cryosphere
TC
Articles | Volume 20, issue 1
Articles | Volume 20, issue 1
https://doi.org/10.5194/tc-20-527-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/tc-20-527-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 20, issue 1
Brief communication
 | 
22 Jan 2026
Brief communication |  | 22 Jan 2026

Brief communication: Evaluation of the ESA CCI+ ESMR v1.1 sea-ice concentration product

Stefan Kern

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Short summary
I evaluated a novel sea-ice concentration data product based on satellite microwave observations during December 1972 to May 1977. I used Landsat-1 satellite images obtained in 1974 in the Arctic, classified into water and ice. My evaluation provides results very similar to evaluations carried out for sea-ice concentration data products based on more recent satellite observations. I suggest that the novel sea-ice concentration data product is a useful extension back in time.
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