How accurate are estimates of glacier ice thickness? Results from ITMIX, the Ice Thickness Models Intercomparison eXperiment
Knowledge of the ice thickness distribution of glaciers and ice caps is an important prerequisite for many glaciological and hydrological investigations. A wealth of approaches has recently been presented for inferring ice thickness from characteristics of the surface. With the Ice Thickness Models...
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Copernicus Publications on behalf of the European Geosciences Union
2017
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Online Access: | http://nora.nerc.ac.uk/id/eprint/517073/ https://nora.nerc.ac.uk/id/eprint/517073/1/Farinotti.pdf https://doi.org/10.5194/tc-11-949-2017 |
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ftnerc:oai:nora.nerc.ac.uk:517073 2023-05-15T18:32:35+02:00 How accurate are estimates of glacier ice thickness? Results from ITMIX, the Ice Thickness Models Intercomparison eXperiment Farinotti, Daniel Brinkerhoff, Douglas J. Clarke, Garry K. C. Fürst, Johannes J. Frey, Holger Gantayat, Prateek Gillet-Chaulet, Fabien Girard, Claire Huss, Matthias Leclercq, Paul W. Linsbauer, Andreas Machguth, Horst Martin, Carlos Maussion, Fabien Morlighem, Mathieu Mosbeux, Cyrille Pandit, Ankur Portmann, Andrea Rabatel, Antoine Ramsankaran, RAAJ Reerink, Thomas J. Sanchez, Olivier Stentoft, Peter A. Singh Kumari, Sangita van Pelt, Ward J. J. Anderson, Brian Benham, Toby Binder, Daniel Dowdeswell, Julian A. Fischer, Andrea Helfricht, Kay Kutuzov, Stanislav Lavrentiev, Ivan McNabb, Robert Gudmundsson, G. Hilmar Li, Huilin Andreassen, Liss M. 2017-04-18 text http://nora.nerc.ac.uk/id/eprint/517073/ https://nora.nerc.ac.uk/id/eprint/517073/1/Farinotti.pdf https://doi.org/10.5194/tc-11-949-2017 en eng Copernicus Publications on behalf of the European Geosciences Union https://nora.nerc.ac.uk/id/eprint/517073/1/Farinotti.pdf Farinotti, Daniel; Brinkerhoff, Douglas J.; Clarke, Garry K. C.; Fürst, Johannes J.; Frey, Holger; Gantayat, Prateek; Gillet-Chaulet, Fabien; Girard, Claire; Huss, Matthias; Leclercq, Paul W.; Linsbauer, Andreas; Machguth, Horst; Martin, Carlos orcid:0000-0002-2661-169X Maussion, Fabien; Morlighem, Mathieu; Mosbeux, Cyrille; Pandit, Ankur; Portmann, Andrea; Rabatel, Antoine; Ramsankaran, RAAJ; Reerink, Thomas J.; Sanchez, Olivier; Stentoft, Peter A.; Singh Kumari, Sangita; van Pelt, Ward J. J.; Anderson, Brian; Benham, Toby; Binder, Daniel; Dowdeswell, Julian A.; Fischer, Andrea; Helfricht, Kay; Kutuzov, Stanislav; Lavrentiev, Ivan; McNabb, Robert; Gudmundsson, G. Hilmar orcid:0000-0003-4236-5369 Li, Huilin; Andreassen, Liss M. 2017 How accurate are estimates of glacier ice thickness? Results from ITMIX, the Ice Thickness Models Intercomparison eXperiment. The Cryosphere, 11 (2). 949-970. https://doi.org/10.5194/tc-11-949-2017 <https://doi.org/10.5194/tc-11-949-2017> cc_by CC-BY Publication - Article PeerReviewed 2017 ftnerc https://doi.org/10.5194/tc-11-949-2017 2023-02-04T19:44:58Z Knowledge of the ice thickness distribution of glaciers and ice caps is an important prerequisite for many glaciological and hydrological investigations. A wealth of approaches has recently been presented for inferring ice thickness from characteristics of the surface. With the Ice Thickness Models Intercomparison eXperiment (ITMIX) we performed the first coordinated assessment quantifying individual model performance. A set of 17 different models showed that individual ice thickness estimates can differ considerably – locally by a spread comparable to the observed thickness. Averaging the results of multiple models, however, significantly improved the results: on average over the 21 considered test cases, comparison against direct ice thickness measurements revealed deviations on the order of 10 ± 24 % of the mean ice thickness (1σ estimate). Models relying on multiple data sets – such as surface ice velocity fields, surface mass balance, or rates of ice thickness change – showed high sensitivity to input data quality. Together with the requirement of being able to handle large regions in an automated fashion, the capacity of better accounting for uncertainties in the input data will be a key for an improved next generation of ice thickness estimation approaches. Article in Journal/Newspaper The Cryosphere Natural Environment Research Council: NERC Open Research Archive The Cryosphere 11 2 949 970 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
description |
Knowledge of the ice thickness distribution of glaciers and ice caps is an important prerequisite for many glaciological and hydrological investigations. A wealth of approaches has recently been presented for inferring ice thickness from characteristics of the surface. With the Ice Thickness Models Intercomparison eXperiment (ITMIX) we performed the first coordinated assessment quantifying individual model performance. A set of 17 different models showed that individual ice thickness estimates can differ considerably – locally by a spread comparable to the observed thickness. Averaging the results of multiple models, however, significantly improved the results: on average over the 21 considered test cases, comparison against direct ice thickness measurements revealed deviations on the order of 10 ± 24 % of the mean ice thickness (1σ estimate). Models relying on multiple data sets – such as surface ice velocity fields, surface mass balance, or rates of ice thickness change – showed high sensitivity to input data quality. Together with the requirement of being able to handle large regions in an automated fashion, the capacity of better accounting for uncertainties in the input data will be a key for an improved next generation of ice thickness estimation approaches. |
format |
Article in Journal/Newspaper |
author |
Farinotti, Daniel Brinkerhoff, Douglas J. Clarke, Garry K. C. Fürst, Johannes J. Frey, Holger Gantayat, Prateek Gillet-Chaulet, Fabien Girard, Claire Huss, Matthias Leclercq, Paul W. Linsbauer, Andreas Machguth, Horst Martin, Carlos Maussion, Fabien Morlighem, Mathieu Mosbeux, Cyrille Pandit, Ankur Portmann, Andrea Rabatel, Antoine Ramsankaran, RAAJ Reerink, Thomas J. Sanchez, Olivier Stentoft, Peter A. Singh Kumari, Sangita van Pelt, Ward J. J. Anderson, Brian Benham, Toby Binder, Daniel Dowdeswell, Julian A. Fischer, Andrea Helfricht, Kay Kutuzov, Stanislav Lavrentiev, Ivan McNabb, Robert Gudmundsson, G. Hilmar Li, Huilin Andreassen, Liss M. |
spellingShingle |
Farinotti, Daniel Brinkerhoff, Douglas J. Clarke, Garry K. C. Fürst, Johannes J. Frey, Holger Gantayat, Prateek Gillet-Chaulet, Fabien Girard, Claire Huss, Matthias Leclercq, Paul W. Linsbauer, Andreas Machguth, Horst Martin, Carlos Maussion, Fabien Morlighem, Mathieu Mosbeux, Cyrille Pandit, Ankur Portmann, Andrea Rabatel, Antoine Ramsankaran, RAAJ Reerink, Thomas J. Sanchez, Olivier Stentoft, Peter A. Singh Kumari, Sangita van Pelt, Ward J. J. Anderson, Brian Benham, Toby Binder, Daniel Dowdeswell, Julian A. Fischer, Andrea Helfricht, Kay Kutuzov, Stanislav Lavrentiev, Ivan McNabb, Robert Gudmundsson, G. Hilmar Li, Huilin Andreassen, Liss M. How accurate are estimates of glacier ice thickness? Results from ITMIX, the Ice Thickness Models Intercomparison eXperiment |
author_facet |
Farinotti, Daniel Brinkerhoff, Douglas J. Clarke, Garry K. C. Fürst, Johannes J. Frey, Holger Gantayat, Prateek Gillet-Chaulet, Fabien Girard, Claire Huss, Matthias Leclercq, Paul W. Linsbauer, Andreas Machguth, Horst Martin, Carlos Maussion, Fabien Morlighem, Mathieu Mosbeux, Cyrille Pandit, Ankur Portmann, Andrea Rabatel, Antoine Ramsankaran, RAAJ Reerink, Thomas J. Sanchez, Olivier Stentoft, Peter A. Singh Kumari, Sangita van Pelt, Ward J. J. Anderson, Brian Benham, Toby Binder, Daniel Dowdeswell, Julian A. Fischer, Andrea Helfricht, Kay Kutuzov, Stanislav Lavrentiev, Ivan McNabb, Robert Gudmundsson, G. Hilmar Li, Huilin Andreassen, Liss M. |
author_sort |
Farinotti, Daniel |
title |
How accurate are estimates of glacier ice thickness? Results from ITMIX, the Ice Thickness Models Intercomparison eXperiment |
title_short |
How accurate are estimates of glacier ice thickness? Results from ITMIX, the Ice Thickness Models Intercomparison eXperiment |
title_full |
How accurate are estimates of glacier ice thickness? Results from ITMIX, the Ice Thickness Models Intercomparison eXperiment |
title_fullStr |
How accurate are estimates of glacier ice thickness? Results from ITMIX, the Ice Thickness Models Intercomparison eXperiment |
title_full_unstemmed |
How accurate are estimates of glacier ice thickness? Results from ITMIX, the Ice Thickness Models Intercomparison eXperiment |
title_sort |
how accurate are estimates of glacier ice thickness? results from itmix, the ice thickness models intercomparison experiment |
publisher |
Copernicus Publications on behalf of the European Geosciences Union |
publishDate |
2017 |
url |
http://nora.nerc.ac.uk/id/eprint/517073/ https://nora.nerc.ac.uk/id/eprint/517073/1/Farinotti.pdf https://doi.org/10.5194/tc-11-949-2017 |
genre |
The Cryosphere |
genre_facet |
The Cryosphere |
op_relation |
https://nora.nerc.ac.uk/id/eprint/517073/1/Farinotti.pdf Farinotti, Daniel; Brinkerhoff, Douglas J.; Clarke, Garry K. C.; Fürst, Johannes J.; Frey, Holger; Gantayat, Prateek; Gillet-Chaulet, Fabien; Girard, Claire; Huss, Matthias; Leclercq, Paul W.; Linsbauer, Andreas; Machguth, Horst; Martin, Carlos orcid:0000-0002-2661-169X Maussion, Fabien; Morlighem, Mathieu; Mosbeux, Cyrille; Pandit, Ankur; Portmann, Andrea; Rabatel, Antoine; Ramsankaran, RAAJ; Reerink, Thomas J.; Sanchez, Olivier; Stentoft, Peter A.; Singh Kumari, Sangita; van Pelt, Ward J. J.; Anderson, Brian; Benham, Toby; Binder, Daniel; Dowdeswell, Julian A.; Fischer, Andrea; Helfricht, Kay; Kutuzov, Stanislav; Lavrentiev, Ivan; McNabb, Robert; Gudmundsson, G. Hilmar orcid:0000-0003-4236-5369 Li, Huilin; Andreassen, Liss M. 2017 How accurate are estimates of glacier ice thickness? Results from ITMIX, the Ice Thickness Models Intercomparison eXperiment. The Cryosphere, 11 (2). 949-970. https://doi.org/10.5194/tc-11-949-2017 <https://doi.org/10.5194/tc-11-949-2017> |
op_rights |
cc_by |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/tc-11-949-2017 |
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The Cryosphere |
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11 |
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