Articles | Volume 12, issue 7
The Cryosphere, 12, 2249–2266, 2018
https://doi.org/10.5194/tc-12-2249-2018
The Cryosphere, 12, 2249–2266, 2018
https://doi.org/10.5194/tc-12-2249-2018
Research article
12 Jul 2018
Research article | 12 Jul 2018

Simulated retreat of Jakobshavn Isbræ since the Little Ice Age controlled by geometry

Nadine Steiger et al.

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Cited articles

Åkesson, H., Nisancioglu, K. H., and Nick, F. M.: Impact of fjord geometry on grounding line stability, Front. Earth Sci., 6, 1–17, https://doi.org/10.3389/feart.2018.00071, 2018. a, b, c, d
Amundson, J. M., Fahnestock, M., Truffer, M., Brown, J., Lüthi, M. P., and Motyka, R. J.: Ice mélange dynamics and implications for terminus stability, Jakobshavn Isbræ, Greenland, J. Geophys. Res.-Earth, 115, 1–12, https://doi.org/10.1029/2009JF001405, 2010. a, b, c
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Benn, D. I., Warren, C. R., and Mottram, R. H.: Calving processes and the dynamics of calving glaciers, Earth-Sci. Rev., 82, 143–179, https://doi.org/10.1016/j.earscirev.2007.02.002, 2007. a
Boghosian, A., Tinto, K., Cochran, J. R., Porter, D., Elieff, S., Burton, B. L., and Bell, R. E.: Resolving bathymetry from airborne gravity along Greenland fjords, J. Geophys. Res.-Sol. Ea., 119, 8516–8533, https://doi.org/10.1002/2014JB011381.Received, 2015. a, b
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Short summary
We use an ice flow model to reconstruct the retreat of Jakobshavn Isbræ since 1850, forced by increased ocean warming and calving. Fjord geometry governs locations of rapid retreat: narrow and shallow areas act as intermittent pinning points for decades, followed by delayed rapid retreat without additional climate warming. These areas may be used to locate potential moraine buildup. Evidently, historic retreat and geometric influences have to be analyzed individually for each glacier system.