Brief communication: Estimating the ice thickness of the Müller Ice Cap to support selection of a drill site
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Published:2022-04-21
Issue:4
Volume:16
Page:1399-1407
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ISSN:1994-0424
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Container-title:The Cryosphere
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language:en
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Short-container-title:The Cryosphere
Author:
Zinck Ann-Sofie PriergaardORCID, Grinsted Aslak
Abstract
Abstract. The Müller Ice Cap will soon set the scene for a new drilling project. Therefore, ice thickness estimates are necessary for planning, since thickness measurements of the ice cap are sparse. Here, three models are presented and compared: (i) a simple Semi-Empirical Ice Thickness Model (SEITMo) based on an inversion of the shallow-ice approximation by the use of a single radar line in combination with the glacier outline, surface slope, and elevation; (ii) an iterative inverse method using the Parallel Ice Sheet Model (PISM), and (iii) a velocity-based inversion of the shallow-ice approximation. The velocity-based inversion underestimates the ice thickness at the ice cap top, making the model less useful to aid in drill site selection, whereas PISM and the SEITMo mostly agree about a good drill site candidate. However, the new SEITMo is insensitive to mass balance, computationally fast, and provides as good fits as PISM.
Publisher
Copernicus GmbH
Subject
Earth-Surface Processes,Water Science and Technology
Reference28 articles.
1. Bueler, E. and Brown, J.: Shallow shelf approximation as a “sliding law” in
a thermomechanically coupled ice sheet model, J. Geophys. Res., 114, F03008, https://doi.org/10.1029/2008JF001179, 2008. a, b 2. Cogley, J., Adams, W. P., Ecclestone, M. A., Jung-Rothenhäusler, F., and
Ommanney, C. S. L.: Mass balance of White Glacier, Axel Heiberg
Island, N.W.T., Canada, 1960–91, J. Glaciol., 42,
548–563, https://doi.org/10.3189/S0022143000003531, 1996. a, b, c 3. Cogley, J. G., Adams, W. P., and Ecclestone, M. A.: Half a Century of
Measurements of Glaciers on Axel Heiberg Island, Nunavut,
Canada, ARCTIC, 64, 371–375, https://doi.org/10.14430/arctic4127, 2011. a 4. Farinotti, D., Huss, M., Bauder, A., Funk, M., and Truffer, M.: A method to
estimate ice volume and ice thickness distribution of alpine glaciers,
J. Glaciol., 55, 422–430, https://doi.org/10.3189/002214309788816759, 2009. a 5. Farinotti, D., Brinkerhoff, D. J., Clarke, G. K. C., Fürst, J. J., Frey, H., Gantayat, P., Gillet-Chaulet, F., Girard, C., Huss, M., Leclercq, P. W., Linsbauer, A., Machguth, H., Martin, C., Maussion, F., Morlighem, M., Mosbeux, C., Pandit, A., Portmann, A., Rabatel, A., Ramsankaran, R., Reerink, T. J., Sanchez, O., Stentoft, P. A., Singh Kumari, S., van Pelt, W. J. J., Anderson, B., Benham, T., Binder, D., Dowdeswell, J. A., Fischer, A., Helfricht, K., Kutuzov, S., Lavrentiev, I., McNabb, R., Gudmundsson, G. H., Li, H., and Andreassen, L. M.: How accurate are estimates of glacier ice thickness? Results from ITMIX, the Ice Thickness Models Intercomparison eXperiment, The Cryosphere, 11, 949–970, https://doi.org/10.5194/tc-11-949-2017, 2017. a, b
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