12 Jan 2015
12 Jan 2015
A sensitivity study of fast outlet glaciers to short timescale cyclical perturbations
- Department of Earth System Science, University of California Irvine, 3200 Croul Hall, Irvine, CA 92697-3100, USA
- Department of Earth System Science, University of California Irvine, 3200 Croul Hall, Irvine, CA 92697-3100, USA
Correspondence: E. Aykutlug (eaykutlu@uci.edu)
Hide author detailsAbstract. The dynamic response of outlet glaciers on short (annual to decadal) timescales is affected by various external forcings, such as basal or oceanic conditions. Understanding the sensitivity of the dynamic response to such forcings can help assess more accurate ice volume projections. In this work, we investigate the spatiotemporal sensitivity of outlet glaciers to fast cyclical forcings using a one-dimensional depth and width-averaged heuristic model. Our results indicate that even on such short timescales, nonlinearities in ice dynamics may lead to an asymmetric response, despite the forcing functions being symmetric around each reference value. Results also show that such short-timescale effects become more pronounced as glaciers become closer to flotation. While being qualitatively similar for both downsloping and upsloping bed geometries, the results indicate higher sensitivity for upsloping ("West Antarctica-like") beds. The range in asymmetric response for different configurations motivate parameterizing or including short-timescale effects in models while investigating the dynamic behavior of outlet glaciers.
E. Aykutlug and T. K. Dupont


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RC C93: 'Review of « A sensitivity study of fast outlet glaciers to short timescale cyclical perturbations » by E. Aykutlug and T.K. Dupont.', Anonymous Referee #1, 17 Feb 2015
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AC C114: 'Reply to review by Referee #1', E. Aykutlug, 24 Feb 2015
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AC C114: 'Reply to review by Referee #1', E. Aykutlug, 24 Feb 2015
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RC C252: 'review of Aykutlug and Dupont (2014)', Anonymous Referee #2, 22 Mar 2015
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AC C429: 'Reply to review by Referee #2', E. Aykutlug, 15 Apr 2015
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AC C429: 'Reply to review by Referee #2', E. Aykutlug, 15 Apr 2015


-
RC C93: 'Review of « A sensitivity study of fast outlet glaciers to short timescale cyclical perturbations » by E. Aykutlug and T.K. Dupont.', Anonymous Referee #1, 17 Feb 2015
-
AC C114: 'Reply to review by Referee #1', E. Aykutlug, 24 Feb 2015
-
AC C114: 'Reply to review by Referee #1', E. Aykutlug, 24 Feb 2015
-
RC C252: 'review of Aykutlug and Dupont (2014)', Anonymous Referee #2, 22 Mar 2015
-
AC C429: 'Reply to review by Referee #2', E. Aykutlug, 15 Apr 2015
-
AC C429: 'Reply to review by Referee #2', E. Aykutlug, 15 Apr 2015
E. Aykutlug and T. K. Dupont
E. Aykutlug and T. K. Dupont
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