Preprint Article Version 1 NOT YET PEER-REVIEWED

An Inter-Comparison of Techniques for Determining Velocities of Maritime Arctic Glaciers, Svalbard, Using Radarsat-2 Wide Fine Mode Data

  1. Department of Geosciences, University of Oslo, 0316 Oslo, Norway
  2. Department of Geography, University of Ottawa, Ottawa, ON K1N 6N5, Canada
Version 1 : Received: 9 September 2016 / Approved: 9 September 2016 / Online: 9 September 2016 (12:14:23 CEST)
Version 2 : Received: 9 September 2016 / Approved: 10 September 2016 / Online: 10 September 2016 (05:03:14 CEST)

A peer-reviewed article of this Preprint also exists.

Schellenberger, T.; Van Wychen, W.; Copland, L.; Kääb, A.; Gray, L. An Inter-Comparison of Techniques for Determining Velocities of Maritime Arctic Glaciers, Svalbard, Using Radarsat-2 Wide Fine Mode Data. Remote Sens. 2016, 8, 785. Schellenberger, T.; Van Wychen, W.; Copland, L.; Kääb, A.; Gray, L. An Inter-Comparison of Techniques for Determining Velocities of Maritime Arctic Glaciers, Svalbard, Using Radarsat-2 Wide Fine Mode Data. Remote Sens. 2016, 8, 785.

Journal reference: Remote Sens. 2016, 8, 785
DOI: 10.3390/rs8090785

Abstract

Glacier dynamics play an important role in the mass balance of many glaciers, ice caps and ice sheets. In this study we exploit Radarsat-2 (RS-2) Wide Fine (WF) data to determine the surface speed of Svalbard glaciers in the winters of 2012/2013 and 2013/2014 using Synthetic Aperture RADAR (SAR) offset and speckle tracking. The RS-2 WF mode combines the advantages of the large spatial coverage of the Wide mode (150 x 150 km) and the high pixel resolution (9m) of the Fine mode and thus has a major potential for glacier velocity monitoring from space through offset and speckle tracking. Faster flowing glaciers (1.95 md-1 - 2.55 md-1) which are studied in more detail are Nathorstbreen, Kronebreen, Kongsbreen and Monacobreen. Using our Radarsat-2 Wide Fine dataset, we compare the performance of two SAR tracking algorithms, namely the GAMMA Remote Sensing Software and a custom written MATLAB script that has primarily been used in the Canadian Arctic. Both algorithms provide comparable results, especially for the faster flowing glaciers and the termini of slower tidewater glaciers. A comparison of the WF data to RS-2 Ultrafine and Wide mode data reveals the superiority of RS-2 WF data over the Wide mode data.

Subject Areas

SAR offset and speckle tracking; glacier velocity; Radarsat-2 Wide Fine; Svalbard

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