the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
First Sentinel-1 detections of avalanche debris
Abstract. Snow avalanches are natural hazards, occurring in snow covered mountain terrain worldwide. Present avalanche research and forecasting relies on complete avalanche activity records in a given area over an entire winter season, which cannot be provided with traditional, mainly field based methods. Remote sensing, using weather, and light independent SAR satellites has the potential of filling these data gaps, however, to date their use was limited by high acquisition costs, long repeat cycles, and small ground swath. Sentinel-1A (S1A), on the other hand, operational since October 2014 provides free-of-charge, 20 m spatial resolution, 250 km × 150 km ground swath images every 12 days. In this paper, we present for the first time, that it is possible to detect avalanche debris using S1A images. We successfully apply a change detection method that enhances avalanche debris zones, by comparing repeat pass images before and after the avalanche occurred. Due to the increase in backscatter from avalanche debris, manual detection is possible. With this first proof-of-concept, we show the detection of 489 avalanche debris zones in a S1A image from 6 January 2015, covering the counties Troms and parts of Nordland in Northern Norway. We validate our avalanche detection using very high resolution Radarsat-2 Ultrafine images, as well as extensive field reconnaissance. Our results give us confidence, that S1A detection of avalanches is a critical step towards operational use of SAR avalanche detection in avalanche forecasting.
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RC C704: 'Comments on “First Sentinel-1 detections of avalanche debris”', Anonymous Referee #1, 06 May 2015
- AC C717: 'Response to Anonymous referee # 1', Eirik Malnes, 07 May 2015
- RC C1139: 'Review', Anonymous Referee #2, 03 Jul 2015
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RC C704: 'Comments on “First Sentinel-1 detections of avalanche debris”', Anonymous Referee #1, 06 May 2015
- AC C717: 'Response to Anonymous referee # 1', Eirik Malnes, 07 May 2015
- RC C1139: 'Review', Anonymous Referee #2, 03 Jul 2015
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Cited
7 citations as recorded by crossref.
- Near-Real Time Automatic Snow Avalanche Activity Monitoring System Using Sentinel-1 SAR Data in Norway M. Eckerstorfer et al. 10.3390/rs11232863
- Automatic Detection of Regional Snow Avalanches with Scattering and Interference of C-band SAR Data J. Yang et al. 10.3390/rs12172781
- Manual detection of snow avalanche debris using high-resolution Radarsat-2 SAR images M. Eckerstorfer & E. Malnes 10.1016/j.coldregions.2015.08.016
- Automatic Color Detection-Based Method Applied to Sentinel-1 SAR Images for Snow Avalanche Debris Monitoring A. Karas et al. 10.1109/TGRS.2021.3131853
- Remote sensing of snow avalanches: Recent advances, potential, and limitations M. Eckerstorfer et al. 10.1016/j.coldregions.2015.11.001
- Analysing changes of the Poyang Lake water area using Sentinel-1 synthetic aperture radar imagery L. Zeng et al. 10.1080/01431161.2017.1370151
- Snow Avalanche Frequency Estimation (SAFE): 32 years of monitoring remote avalanche depositional zones in high mountains of Afghanistan A. Caiserman et al. 10.5194/tc-16-3295-2022