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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2017
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ftoslouniv:oai:www.duo.uio.no:10852/64100 2023-05-15T18:32:34+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 Willem Linsbauer, Andreas Machguth, Horst Martin, Carlos Maussion, Fabien Morlighem, Mathieu Mosbeux, Cyrille Pandit, Ankur Portmann, Andrea Rabatel, Antoine Ramsankaran, Raaj A.A.J. 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 Whitfield Gudmundsson, G. Hilmar Li, Huilin Andreassen, Liss Marie 2017-10-18T15:11:21Z http://hdl.handle.net/10852/64100 http://urn.nb.no/URN:NBN:no-66643 https://doi.org/10.5194/tc-11-949-2017 EN eng National Snow and Ice Data Center http://urn.nb.no/URN:NBN:no-66643 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 Willem Linsbauer, Andreas Machguth, Horst Martin, Carlos Maussion, Fabien Morlighem, Mathieu Mosbeux, Cyrille Pandit, Ankur Portmann, Andrea Rabatel, Antoine Ramsankaran, Raaj A.A.J. 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 Whitfield Gudmundsson, G. Hilmar Li, Huilin Andreassen, Liss Marie . How accurate are estimates of glacier ice thickness? Results from ITMIX, the Ice Thickness Models Intercomparison eXperiment. The Cryosphere. 2017, 11(2), 949-970 http://hdl.handle.net/10852/64100 1505653 info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=The Cryosphere&rft.volume=11&rft.spage=949&rft.date=2017 The Cryosphere 11 2 949 970 http://dx.doi.org/10.5194/tc-11-949-2017 URN:NBN:no-66643 Fulltext https://www.duo.uio.no/bitstream/handle/10852/64100/2/tc-11-949-2017.pdf Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/ CC-BY 1994-0416 Journal article Tidsskriftartikkel Peer reviewed PublishedVersion 2017 ftoslouniv https://doi.org/10.5194/tc-11-949-2017 2020-06-21T08:51:49Z 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 Universitet i Oslo: Digitale utgivelser ved UiO (DUO) The Cryosphere 11 2 949 970 |
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Open Polar |
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Universitet i Oslo: Digitale utgivelser ved UiO (DUO) |
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ftoslouniv |
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 Willem Linsbauer, Andreas Machguth, Horst Martin, Carlos Maussion, Fabien Morlighem, Mathieu Mosbeux, Cyrille Pandit, Ankur Portmann, Andrea Rabatel, Antoine Ramsankaran, Raaj A.A.J. 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 Whitfield Gudmundsson, G. Hilmar Li, Huilin Andreassen, Liss Marie |
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 Willem Linsbauer, Andreas Machguth, Horst Martin, Carlos Maussion, Fabien Morlighem, Mathieu Mosbeux, Cyrille Pandit, Ankur Portmann, Andrea Rabatel, Antoine Ramsankaran, Raaj A.A.J. 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 Whitfield Gudmundsson, G. Hilmar Li, Huilin Andreassen, Liss Marie 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 Willem Linsbauer, Andreas Machguth, Horst Martin, Carlos Maussion, Fabien Morlighem, Mathieu Mosbeux, Cyrille Pandit, Ankur Portmann, Andrea Rabatel, Antoine Ramsankaran, Raaj A.A.J. 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 Whitfield Gudmundsson, G. Hilmar Li, Huilin Andreassen, Liss Marie |
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 |
National Snow and Ice Data Center |
publishDate |
2017 |
url |
http://hdl.handle.net/10852/64100 http://urn.nb.no/URN:NBN:no-66643 https://doi.org/10.5194/tc-11-949-2017 |
genre |
The Cryosphere |
genre_facet |
The Cryosphere |
op_source |
1994-0416 |
op_relation |
http://urn.nb.no/URN:NBN:no-66643 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 Willem Linsbauer, Andreas Machguth, Horst Martin, Carlos Maussion, Fabien Morlighem, Mathieu Mosbeux, Cyrille Pandit, Ankur Portmann, Andrea Rabatel, Antoine Ramsankaran, Raaj A.A.J. 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 Whitfield Gudmundsson, G. Hilmar Li, Huilin Andreassen, Liss Marie . How accurate are estimates of glacier ice thickness? Results from ITMIX, the Ice Thickness Models Intercomparison eXperiment. The Cryosphere. 2017, 11(2), 949-970 http://hdl.handle.net/10852/64100 1505653 info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=The Cryosphere&rft.volume=11&rft.spage=949&rft.date=2017 The Cryosphere 11 2 949 970 http://dx.doi.org/10.5194/tc-11-949-2017 URN:NBN:no-66643 Fulltext https://www.duo.uio.no/bitstream/handle/10852/64100/2/tc-11-949-2017.pdf |
op_rights |
Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/tc-11-949-2017 |
container_title |
The Cryosphere |
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11 |
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2 |
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949 |
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970 |
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