Published March 29, 2024
| Version v1
Dataset
Open
Data for 'Mapping and characterization of avalanches on mountain glaciers with Sentinel-1 satellite imagery'
Authors/Creators
- 1. Institut des Géosciences de l'Environnement (IGE), Université Grenoble-Alpes, Grenoble, France
- 2. Department of Atmospheric and Cryospheric Sciences, University of Innsbruck, Innsbruck, Austria
- 3. Centre d'Etudes de la Neige (CEN), Université Grenoble-Alpes, CNRS, CNRM, Météo France, Grenoble, France
- 4. GAMMA Remote Sensing, Bern, Switzerland
- 5. School of Geographical Sciences, University of Bristol, Bristol, UK
Description
This dataset contains avalanche deposit outlines (as shapefiles) derived for the study 'Mapping and characterization of avalanches on mountain glaciers with Sentinel-1 satellite imagery'
They were outlined at three different sites (Mt Blanc, Everest and Hispar regions) for the periods 11/2016-10/2021 (Mt Blanc) and 11/2017-10/2022 (Everest and Hispar). The time period is indicated in the file name.
For each dataset we give the raw outlines (Automated_outlines_dates), the manually updated (Automated_outlines_dates_ManualUpd) and the manually updated after accounting for surface elevation change (Automated_outlines_dates_ManualUpd_shifted).
In order to know which scenes were used for the mapping (if no avalanche was detected, we did not provide a shapefile, but this doesn't been that there is a gap in the Sentinel-1 time series), we provide a Sentinel1_date file that shows all the Sentinel-1 RGB pairs that we used to detect the avalanches.
We also provide as geotiffs the temporally aggregated outlines (Automated_outlines_dates_ManualUpd_shifted_aggregated; over one specific year yn - from 01/11/yn-1 to 01/11/yn - or the full study period):
- as heatmaps (where the value of each pixel corresponds to the number of avalanches that occured)
- as binary maps of deposits (where 1 is when an avalanche occured over the time period and 0 is where none were detected).
Finally we provide a csv file for each region with metrics per glacier:
RGI ID
Glacier size (in m^2)
Catchment size (in m^2)
Area of slopes steeper than 30° (in m^2)
The area of total deposits detected (by summing all the pixels of the deposit binary maps) in the ascending obits (in m^2)
The area of total deposits detected (by summing all the pixels of the deposit binary maps) in the descending obits (in m^2)
The avalanche activity detected (by summing all pixels of the heat maps) in the ascending orbits (in m^2)
The avalanche activity detected (by summing all pixels of the heat maps) in the descending orbits (in m^2)
The area of the glacier visible in the ascending orbits (in m^2)
The area of the glacier visible in the descending orbits (in m^2)
The main Google Earth Engine and Matlab scripts used to pre-process the Sentinel-1 GRD images and to map the avalanches are available on GitHub: https://github.com/MarinKneib/S1_avalanches
Files
Everest.zip
Additional details
Related works
- Is supplement to
- Preprint: 10.5194/egusphere-2023-2007 (DOI)
Funding
- Swiss National Science Foundation
- Contribution of avalanches to glacier mass balance (CAIRN) P500PN_210739
Software
- Repository URL
- https://github.com/MarinKneib/S1_avalanches
- Programming language
- MATLAB , JavaScript