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...
Published in: | The Cryosphere |
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Format: | Article in Journal/Newspaper |
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Online Access: | https://nrl.northumbria.ac.uk/id/eprint/43960/ https://doi.org/10.5194/tc-11-949-2017 https://nrl.northumbria.ac.uk/id/eprint/43960/1/tc-11-949-2017.pdf |
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ftunivnorthumb:oai:nrl.northumbria.ac.uk:43960 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, Hilmar Li, Huilin Andreassen, Liss M. 2017-04-18 text https://nrl.northumbria.ac.uk/id/eprint/43960/ https://doi.org/10.5194/tc-11-949-2017 https://nrl.northumbria.ac.uk/id/eprint/43960/1/tc-11-949-2017.pdf en eng Coperincus https://nrl.northumbria.ac.uk/id/eprint/43960/1/tc-11-949-2017.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, 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, Hilmar, Li, Huilin and 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). pp. 949-970. ISSN 1994-0424 cc_by_4_0 CC-BY F600 Geology F700 Ocean Sciences F800 Physical and Terrestrial Geographical and Environmental Sciences F900 Others in Physical Sciences Article PeerReviewed 2017 ftunivnorthumb https://doi.org/10.5194/tc-11-949-2017 2022-09-25T06:12:31Z 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 Northumbria University, Newcastle: Northumbria Research Link (NRL) The Cryosphere 11 2 949 970 |
institution |
Open Polar |
collection |
Northumbria University, Newcastle: Northumbria Research Link (NRL) |
op_collection_id |
ftunivnorthumb |
language |
English |
topic |
F600 Geology F700 Ocean Sciences F800 Physical and Terrestrial Geographical and Environmental Sciences F900 Others in Physical Sciences |
spellingShingle |
F600 Geology F700 Ocean Sciences F800 Physical and Terrestrial Geographical and Environmental Sciences F900 Others in Physical Sciences 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, Hilmar Li, Huilin Andreassen, Liss M. How accurate are estimates of glacier ice thickness? Results from ITMIX, the Ice Thickness Models Intercomparison eXperiment |
topic_facet |
F600 Geology F700 Ocean Sciences F800 Physical and Terrestrial Geographical and Environmental Sciences F900 Others in Physical Sciences |
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, Hilmar Li, Huilin Andreassen, Liss M. |
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, 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 |
Coperincus |
publishDate |
2017 |
url |
https://nrl.northumbria.ac.uk/id/eprint/43960/ https://doi.org/10.5194/tc-11-949-2017 https://nrl.northumbria.ac.uk/id/eprint/43960/1/tc-11-949-2017.pdf |
genre |
The Cryosphere |
genre_facet |
The Cryosphere |
op_relation |
https://nrl.northumbria.ac.uk/id/eprint/43960/1/tc-11-949-2017.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, 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, Hilmar, Li, Huilin and 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). pp. 949-970. ISSN 1994-0424 |
op_rights |
cc_by_4_0 |
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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