Goal of the
Working Group

The working group aims at (A) conducting a model intercomparison and validation experiment for methods that infer glacier ice thickness distributions from characteristics of the surface, (B) working towards a consensus assessment of the total ice volume of the glaciers and ice caps around the globe, and (C) continuing the efforts initiated by the World Glacier Monitoring Service (WGMS) in centralizing the ice thickness measurements available worldwide.
[full proposal: pdf 218 kB]

Model intercomparison:
Join the Ice Thickness Models Intercomparison eXperiment (ITMIX)

Scope:
Background
Objectives
Deliverables
Status

Deadlines:
Deadlines can be found here.

Relevant publications:
Publication list

Related Working Groups:
Randolph Glacier Inventory
Mass balance terminology

[back to working groups page]

 

IACS Working group
Division on Glaciers and Ice Sheets

Glacier ice thickness estimation
(2014 - 2018)

 

WG co-chairs :

Daniel Farinotti, Laboratory of Hydraulics, Hydrology and Glaciology (VAW), ETH Zurich, Switzerland, and Swiss Federal Institute for Forest, Snow and Landscape Research (WSL), Switzerland
Huilin Li, Cold and Arid Regions Environmental & Engineering Research Institute (CAREERI), China
Liss M. Andreassen, Norwegian Water Resources and Energy Directorate (NVE), Norway

Advisory board :

G. Hilmar Gudmundsson, British Antarctic Survey (BAS), United Kingdom
Matthias Huss, Laboratory of Hydraulics, Hydrology and Glaciology (VAW), ETH Zurich, Switzerland

WG members :

Brian Anderson, Victoria University of Wellington, New Zealand
David Bahr, University of Colorado, USA
Daniel Binder, Zentralanstalt für Meteorologie und Geodynamik (ZAMG), Austria
Garry K.C. Clarke, University of British Columbia (UBC), Canada
Andrea Fischer, Austrian Academy of Sciences, Austria
Johannes Fürst, Friedrich-Alexander-Universität (FAU) Erlangen-Nürnberg, Germany
Prateek Gantayat, Indian Institute of Science, India
Fabien Gillet-Chaulet, Laboratoire de Glaciologie et Géophysique de l'Environnement (LGGE), France
Kay Helfricht, Austrian Academy of Sciences, Austria
Stanislav Kutuzov, Russian Academy of Sciences, Russia
Ivan Lavrentiev, Russian Academy of Sciences, Russia
Paul Leclercq University of Oslo, Norway
Andreas Linsbauer, University of Fribourg (UNIFRI), Switzerland
Yuri Macharet, Russian Academy of Sciences, Russia
Horst Machguth, Arctic Technology Centre (ARTEK), Denmark
Carlos Martin, British Antarctic Survey (BAS), United Kingdom
Fabien Maussion, University of Innsbruck, Austria
Robert W. McNabb, University of Alaska Fairbanks (UAF), USA
Matthieu Morlighem, University of California (JPL), USA
Francisco Navarro, Universidad Politécnica de Madrid, Spain
Dmitry Petrakov, Moscow State University, Russia
Antoine Rabatel, Laboratoire de Glaciologie et Géophysique de l'Environnement (LGGE), Grenoble, France
Marius Schaefer, Austral University of Chile, Chile
Lasse Rabenstein, Institute of Geophysics, ETH Zurich, Switzerland
Valentina Radić, University of British Columbia, Canada
Ward J. J. van Pelt, Norwegian Polar Institute (NPI), Norway
Michael Zemp, University of Zurich (GIUZ), Switzerland

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Background :

Knowledge of the ice thickness distribution and the total volume of a glacier or ice cap is one of the most important prerequisites when addressing a number of glaciological and hydrological problems: It is essential for determining the subglacial topography, which is a necessary boundary condition for ice-flow modeling, and ultimately limits the amount of stored water, which is central for questions linked to water availability, hydrology, or sea level change. Despite this importance, knowledge about the ice thickness distribution of the various glaciers around the globe is remarkably limited. This fact is mainly due to the difficulties in measuring glacier ice thickness directly. To overcome the problem, a series of methods that aim at inferring the total volume and/or the ice thickness distribution of a glacier from the characteristics of its surface have been developed.

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Objectives :

  1. Perform a model intercomparison and validation experiment for methods that infer the ice thickness distribution of a glacier from characteristics of the surface
    1. Perform a round-robin experiment in which the ice thickness for a set of suitable benchmark glaciers is estimated by as many methods as possible.
    2. Collect, validate, and intercompare the results
    3. Assess which methods are suitable for what situation, and present the results to the community

  2. Associate an estimate of the ice thickness distribution to every glacier of the Randolph Glacier Inventory (RGI)

  3. Continue the World Glacier Monitoring Service (WGMS) effort in the collection of ice thickness measurements

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Deliverables :

    • Open call for participation in the model intercomparison and validation experiment
    • Workshop presenting and discussing the results of the experiment
    • Scientific publication presenting the results of the experiment to the wider community

    • Estimated ice thickness distribution for every glacier included in the RGI
    • Link between the provided ice thickness distribution and the RGI outlines

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Status of the activities :

  1. The first phase of the Ice Thickness Models Intercomparison eXperiment (ITMIX) is completed. Results can be found in our article in The Cryosphere

  2. ITMIX phase two (ITMIX2) will be launched soon.

  3. Activities for achieving Objective B are ongoing. Result are expected for 2017.

  4. The second version of the Glacier Thickness Database (GlaThiDa 2.0) is available here or through the GTN-G data browser.

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Deadlines :

Deadlines relevant for the working group can be found here.

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Related publications :

Farinotti, D., Brinkerhoff, D., 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. (2016): How accurate are estimates of glacier ice thickness? Results from ITMIX, the Ice Thickness Models Intercomparison eXperiment. The Cryosphere Discussions. Vol. 2016, pages 1-34.
DOI: 10.5194/tc-2016-250

Andreassen, L.M., M. Huss, K. Melvold, H. Elvehøy, and S.H. Winsvold (2015): Ice thickness measurements and volume estimates for glaciers in Norway. Journal of Glaciology. Vol. 61 (228), pages 763-775.
DOI: 10.3189/2015JoG14J161

Gärtner-Roer, I., K. Naegeli, M. Huss, T. Knecht, H. Machguth, and M. Zemp. (2014): A database of worldwide glacier thickness observations. Global and Planetary Change. Vol. 122, pages 330–344.
DOI: 10.1016/j.gloplacha.2014.09.003

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