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https://doi.org/10.5194/tcd-8-6235-2014
© Author(s) 2014. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/tcd-8-6235-2014
© Author(s) 2014. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
20 Dec 2014
Status: this preprint has been withdrawn by the authors.
Brief Communication: 2014 velocity and flux for five major Greenland outlet glaciers using ImGRAFT and Landsat-8
Abstract. This study presents average velocity fields, mass flux estimates and central flowline profiles for five major Greenland outlet glaciers; Jakobshavn Isbræ, Nioghalvfjerdsbræ, Kangerdlugssuaq, Helheim and Petermann glaciers, spanning the period (August) 2013–(September) 2014. The results are produced by the feature tracking toolbox, ImGRAFT using Landsat-8, panchromatic data. The resulting velocity fields agree with the findings of existing studies. Furthermore, our results show an unprecedented speed of over 50 m day−1 at Jakobshavn Isbræ as it continues to retreat. All the processed data will be freely available for download at http://imgraft.glaciology.net.
This preprint has been withdrawn.
How to cite. Messerli, A., Karlsson, N. B., and Grinsted, A.: Brief Communication: 2014 velocity and flux for five major Greenland outlet glaciers using ImGRAFT and Landsat-8, The Cryosphere Discuss., 8, 6235–6250, https://doi.org/10.5194/tcd-8-6235-2014, 2014.
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Interactive discussion
Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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RC C2731: 'I don't understand what the purpose of this paper is.', Anonymous Referee #1, 22 Dec 2014
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RC C2785: 'needs more in specifics and analysis', Anonymous Referee #2, 27 Dec 2014
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SC C2846: 'ImGRAFT and Landsat 8 velocity flux of five major Greenland Outlet glaciers', Mauri Pelto, 12 Jan 2015
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RC C2872: 'Review of manuscript', Anonymous Referee #3, 13 Jan 2015
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EC C2874: 'Editor's comments', Jonathan L. Bamber, 13 Jan 2015
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SC C2950: 'Jakobshavn Speeds', Ian Joughin, 26 Jan 2015
Interactive discussion
Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
- Printer-friendly version
- Supplement
-
RC C2731: 'I don't understand what the purpose of this paper is.', Anonymous Referee #1, 22 Dec 2014
-
RC C2785: 'needs more in specifics and analysis', Anonymous Referee #2, 27 Dec 2014
-
SC C2846: 'ImGRAFT and Landsat 8 velocity flux of five major Greenland Outlet glaciers', Mauri Pelto, 12 Jan 2015
-
RC C2872: 'Review of manuscript', Anonymous Referee #3, 13 Jan 2015
-
EC C2874: 'Editor's comments', Jonathan L. Bamber, 13 Jan 2015
-
SC C2950: 'Jakobshavn Speeds', Ian Joughin, 26 Jan 2015
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A. Messerli
CORRESPONDING AUTHOR
Section for Glaciers, Snow and Ice, Hydrology Department, Norwegian Water Resources and Energy Directorate, P.O. Box 5091 Majorstua, 0301 Oslo, Norway
Centre for Ice and Climate, Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, 2100 Copenhagen Ø, Denmark
N. B. Karlsson
Centre for Ice and Climate, Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, 2100 Copenhagen Ø, Denmark
A. Grinsted
Centre for Ice and Climate, Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, 2100 Copenhagen Ø, Denmark
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Short summary
We use 2014 Landsat-8 imagery in combination with a newly developed feature tracking toolbox, ImGRAFT to produce velocity fields and flux for five major Greenland marine terminating glaciers: Helheim, Kangerdlugssuaq, Nioghalvfjerdsbræ, Petermann and Jakobshavn Isbræ. A major finding of the paper documents the increased velocities observed at Jakobshavn Isbræ. We measure velocities over 50m/day which exceed that of the previously recorded maximum.
We use 2014 Landsat-8 imagery in combination with a newly developed feature tracking toolbox,...