Articles | Volume 17, issue 11
Research article
20 Nov 2023
Research article |  | 20 Nov 2023

Observations of preferential summer melt of Arctic sea-ice ridge keels from repeated multibeam sonar surveys

Evgenii Salganik, Benjamin A. Lange, Christian Katlein, Ilkka Matero, Philipp Anhaus, Morven Muilwijk, Knut V. Høyland, and Mats A. Granskog

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Cited articles

Amundrud, T. L., Melling, H., and Ingram, G.: Geometrical constraints on the evolution of ridged sea ice, J. Geophys. Res.-Oceans, 109, 1–12,, 2004. 
Amundrud, T. L., Melling, H., Ingram, R. G., and Allen, S. E.: The effect of structural porosity on the ablation of sea ice ridges, J. Geophys. Res., 111, C06004,, 2006. 
Bowen, R. G. and Topham, D. R.: A study of the morphology of a discontinuous section of a first year arctic pressure ridge, Cold Reg. Sci. Technol., 24, 83–100,, 1996. 
Cox, G. F. N. and Weeks, W. F.: Equations for determining the gas and brine volumes in sea-ice samples, J. Glaciol., 29, 306–316,, 1983. 
Crameri, F., Shephard, G. E., and Heron, P. J.: The misuse of colour in science communication, Nat. Commun., 11, 5444,, 2020. 
Short summary
The Arctic Ocean is covered by a layer of sea ice that can break up, forming ice ridges. Here we measure ice thickness using an underwater sonar and compare ice thickness reduction for different ice types. We also study how the shape of ridged ice influences how it melts, showing that deeper, steeper, and narrower ridged ice melts the fastest. We show that deformed ice melts 3.8 times faster than undeformed ice at the bottom ice--ocean boundary, while at the surface they melt at a similar rate.