Articles | Volume 12, issue 8
https://doi.org/10.5194/tc-12-2707-2018
https://doi.org/10.5194/tc-12-2707-2018
Research article
 | 
17 Aug 2018
Research article |  | 17 Aug 2018

Diagnosing ice sheet grounding line stability from landform morphology

Lauren M. Simkins, Sarah L. Greenwood, and John B. Anderson

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Cited articles

Alley, K. E., Scambos, T. A., Siegfried, M. R., and Fricker, H. A.: Impacts of warm water on Antarctic ice shelf stability through basal channel formation, Nat. Geosci., 9, 290–293, 2016.
Alley, R. B., Blankenship, D. D., Bentley, C. R., and Rooney, S.: Till beneath ice stream B: 3. Till deformation: evidence and implications, J. Geophys. Res.-Sol. Ea., 92, 8921–8929, 1987.
Alley, R. B.: Water-pressure coupling of sliding and bed deformation: I. Water system, J. Glaciol., 35, 108–118, 1989.
Alley, R. B., Anandakrishnan, S., Dupont, T. K., Parizek, B. R., and Pollard, D.: Effect of sedimentation on ice-sheet grounding-line stability, Science, 315, 1838–1841, 2007.
Anandakrishnan, S., Voigt, D. E., Alley, R. B., and King, M. A.:. Ice stream D flow speed is strongly modulated by the tide beneath the Ross Ice Shelf, Geophys. Res. Lett., 30, 1361, https://doi.org/10.1029/2002GL016329, 2003.
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Short summary
Using thousands of grounding line landforms in the Ross Sea, Antarctica, we observe two distinct landform types associated with contrasting styles of grounding line retreat. We characterise landform morphology, examine factors that control landform morphology and distribution, and explore drivers of grounding line (in)stability. This study highlights the importance of understanding thresholds which may destabilise a system and of controls on grounding line retreat over a range of timescales.