Articles | Volume 18, issue 4
https://doi.org/10.5194/tc-18-2035-2024
https://doi.org/10.5194/tc-18-2035-2024
Research article
 | 
30 Apr 2024
Research article |  | 30 Apr 2024

Lake ice break-up in Greenland: timing and spatiotemporal variability

Christoph Posch, Jakob Abermann, and Tiago Silva

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Cited articles

Abermann, J., Eckerstorfer, M., Malnes, E., and Hansen, B. U.: A large wet snow avalanche cycle in West Greenland quantified using remote sensing and in situ observations, Nat. Hazards, 97, 517–534, https://doi.org/10.1007/s11069-019-03655-8, 2019. 
Abermann, J., Langley, K., Myreng, S. M., Rasmussen, K., and Petersen, D.: Heterogeneous timing of freshwater input into Kobbefjord, a low-arctic fjord in Greenland, Hydrol. Process., 35, e14413, https://doi.org/10.1002/hyp.14413, 2021. 
Adrian, R., O'Reilly, C. M., Zagarese, H., Baines, S. B., Hessen, D. O., Keller, W., Livingstone, D. M., Sommaruga, R., Straile, D., Van Donk, E., Weyhenmeyer, G. A., and Winderl, M.: Lakes as sentinels of climate change, Limnol Oceanogr., 54, 2283–2297, https://doi.org/10.4319/lo.2009.54.6_part_2.2283, 2009. 
Bales, R. C., Guo, Q., Shen, D., McConnell, J. R., Du G., Burkhart, J. F., Spikes, V. B., Hanna, E., and Cappelen, J.: Annual accumulation for Greenland updated using ice core data developed during 2000–2006 and analysis of daily coastal meteorological data, J. Geophys. Res., 114, D06116, https://doi.org/10.1029/2008JD011208, 2009. 
Ballinger, T. J., Hanna, E., Hall, R. J., Carr, J. R., Brasher, S., Osterberg, E. C., Capellen, J., Tedesco, M., Ding, Q., and Mernild, S. H.: The role of blocking circulation and emerging open water feedbacks on Greenland cold-season air temperature variability over the last century, Int. J. Climatol., 41, E2778–E2800, https://doi.org/10.1002/joc.6879, 2020. 
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Short summary
Radar beams from satellites exhibit reflection differences between water and ice. This condition, as well as the comprehensive coverage and high temporal resolution of the Sentinel-1 satellites, allows automatically detecting the timing of when ice cover of lakes in Greenland disappear. We found that lake ice breaks up 3 d later per 100 m elevation gain and that the average break-up timing varies by ±8 d in 2017–2021, which has major implications for the energy budget of the lakes.
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