The Cryosphere
The Cryosphere
TC
Articles | Volume 17, issue 4
Articles | Volume 17, issue 4
https://doi.org/10.5194/tc-17-1697-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/tc-17-1697-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 17, issue 4
Research article
 | 
19 Apr 2023
Research article |  | 19 Apr 2023

Bedfast and floating-ice dynamics of thermokarst lakes using a temporal deep-learning mapping approach: case study of the Old Crow Flats, Yukon, Canada

Maria Shaposhnikova, Claude Duguay, and Pascale Roy-Léveillée

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Antonova, S., Duguay, C. R., Kääb, A., Heim, B., Langer, M., Westermann, S., and Boike, J.: Monitoring bedfast ice and ice phenology in lakes of the Lena river delta using TerraSAR-X backscatter and coherence time series, Remote. Sens., 8, 1–23, 2016. 
Arp, C. D., Jones, B. M., Urban, F. E., and Grosse, G.: Hydrogeomorphic processes of thermokarst lakes with grounded-ice and floating-ice regimes on the Arctic coastal plain, Alaska, Hydrol. Process., 25, 2422–2438, 2011. 
Arp, C. D., Jones, B. M., Lu, Z., and Whitman, M. S.: Shifting balance of thermokarst lake ice regimes across the Arctic Coastal Plain of northern Alaska, Geophys. Res. Lett., 39, 1–5, 2012. 
Atwood, D., Gunn, G., Roussi, C., Wu, J., Duguay, C., and Sarabandi, K.: Microwave backscatter from Arctic lake ice and polarimetric implications, IEEE Trans. Geosci. Remote Sens., 53, 5972–5982, https://doi.org/10.1109/TGRS.2015.2429917, 2015. 
Bartsch, A., Pointner, G., Leibman, M. O., Dvornikov, Y. A., Khomutov, A. V., and Trofaier, A. M.: Circumpolar mapping of ground-fast lake ice, Front. Earth Sci., 5, 1–16, 2017. 
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We explore lake ice in the Old Crow Flats, Yukon, Canada, using a novel approach that employs radar imagery and deep learning. Results indicate an 11 % increase in the fraction of lake ice that grounds between 1992/1993 and 2020/2021. We believe this is caused by widespread lake drainage and fluctuations in water level and snow depth. This transition is likely to have implications for permafrost beneath the lakes, with a potential impact on methane ebullition and the regional carbon budget.
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