The Cryosphere
The Cryosphere
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Articles | Volume 15, issue 5
Articles | Volume 15, issue 5
https://doi.org/10.5194/tc-15-2333-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/tc-15-2333-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 15, issue 5
Research article
 | 
20 May 2021
Research article |  | 20 May 2021

Geographic variation and temporal trends in ice phenology in Norwegian lakes during the period 1890–2020

Jan Henning L'Abée-Lund, Leif Asbjørn Vøllestad, John Edward Brittain, Ånund Sigurd Kvambekk, and Tord Solvang

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Short summary
Observations from 1890 to 2020 of ice phenology for 101 Norwegian lakes were used to detect variation in ice phenology. The average date of ice break-up occurred later in spring with increasing elevation, latitude and longitude. The average date of freeze-up and the length of the ice-free period decreased with elevation and longitude. Lakes were completely frozen later recently in autumn. There is a significant trend for earlier break-up, later freeze-up and completely frozen lakes after 1991.
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