Scheer, Johanna; Caduff, Rafael; How, Penelope; Marcer, Marco; Strozzi, Tazio; Bartsch, Annett; Ingeman-Nielsen, Thomas (2024): Mapping the frost susceptibility of the ground from thaw-season InSAR surface displacements and extrapolated active layer thicknesses, Ilulissat, West-Greenland [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.964306
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Abstract:
Interferometric Synthetic Aperture Radar (InSAR) images (L1 Single Look Complex data from ESA/Copernicus Sentinel-1) were acquired between May and September during the thawing seasons from 2015 to 2019, over the area of Ilulissat, West Greenland. Rasters of thaw-season ground surface displacements were obtained from the interferometric processing of the SAR scenes. The 2015-2019 average seasonal displacement (S) and long-term deformation rate (R) were derived by least-squares inversion from the surface displacement rasters. In addition, active layer thicknesses (ALT) probed in Ilulissat at the end of the summers of 2020 and 2021 were extrapolated using a vegetation map derived from a Random Forest classification of multi-temporal Sentinel-2 optical images. The average seasonal displacement and extrapolated ALT were finally used to estimate the amount of ice present in the active layer, indicating the frost susceptibility of the ground.
This dataset first contains the yearly thaw-season surface displacement rasters in the radar line-of-sight (LOS) direction, and the derived average seasonal and long-term deformation rasters. Secondly, the ALT measurements and floristic data used as inputs and validation in the study are provided along with the land cover classification, extrapolated ALT and frost susceptibility index rasters.
Related to:
Scheer, Johanna; Caduff, Rafael; How, Penelope; Marcer, Marco; Strozzi, Tazio; Bartsch, Annett; Ingeman-Nielsen, Thomas (2023): Thaw-Season InSAR Surface Displacements and Frost Susceptibility Mapping to Support Community-Scale Planning in Ilulissat, West Greenland. Remote Sensing, 15(13), 3310, https://doi.org/10.3390/rs15133310
Source:
Documentation:
Project(s):
Funding:
European Space Agency (ESA), grant/award no. 4000128395/19/I-DT: Arctic Active Layer Monitoring for Infrastructure Management (AALM4INFRAM)
Horizon 2020 (H2020), grant/award no. 773421: NUNATARYUK, Permafrost thaw and the changing Arctic coast, science for socioeconomic adaptation
Coverage:
Median Latitude: 69.235358 * Median Longitude: -51.071050 * South-bound Latitude: 69.195710 * West-bound Longitude: -51.157112 * North-bound Latitude: 69.275006 * East-bound Longitude: -50.984989
Date/Time Start: 2015-07-26T00:00:00 * Date/Time End: 2019-09-15T00:00:00
Event(s):
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Data type | Data type | Scheer, Johanna | |||
| 2 | File content | Content | Scheer, Johanna | |||
| 3 | DATE/TIME | Date/Time | Scheer, Johanna | Geocode – start | ||
| 4 | DATE/TIME | Date/Time | Scheer, Johanna | Geocode – end | ||
| 5 | Text file | TEXT | Scheer, Johanna | |||
| 6 | Raster graphic, GeoTIFF format | GeoTIFF | Scheer, Johanna | |||
| 7 | Text file | TEXT | Scheer, Johanna | color scale | ||
| 8 | Documentation file | DOCS | Scheer, Johanna |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Basic curation (CurationLevelB)
Size:
43 data points
Data
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| 1 Data type | 2 Content | 3 Date/Time (start) | 4 Date/Time (end) | 5 TEXT | 6 GeoTIFF | 7 TEXT (color scale) | 8 DOCS |
|---|---|---|---|---|---|---|---|
| Yearly thaw-season ground surface displacements | Line-of-sight (LOS) thaw-season ground surface displacement raster - year 2015 | 2015-07-26 | 2015-09-12 | ILU_InSAR_LOS_surface_displacement_2015.tif | |||
| Yearly thaw-season ground surface displacements | Line-of-sight (LOS) thaw-season ground surface displacement raster - year 2016 | 2016-06-02 | 2016-09-18 | ILU_InSAR_LOS_surface_displacement_2016.tif | |||
| Yearly thaw-season ground surface displacements | Line-of-sight (LOS) thaw-season ground surface displacement raster - year 2017 | 2017-06-03 | 2017-09-17 | ILU_InSAR_LOS_surface_displacement_2017.tif | |||
| Yearly thaw-season ground surface displacements | Line-of-sight (LOS) thaw-season ground surface displacement raster - year 2018 | 2018-05-23 | 2018-09-08 | ILU_InSAR_LOS_surface_displacement_2018.tif | |||
| Yearly thaw-season ground surface displacements | Line-of-sight (LOS) thaw-season ground surface displacement raster - year 2019 | 2019-04-30 | 2019-09-15 | ILU_InSAR_LOS_surface_displacement_2019.tif | |||
| 2015-2019 maps of average seasonal ground surface displacement and long-term displacement rate | Average seasonal ground surface displacement raster for the period 2015-2019 | ILU_InSAR_avg_seas_displacement_raster_S_2015-2019.tif | |||||
| 2015-2019 maps of average seasonal ground surface displacement and long-term displacement rate | Long-term ground surface displacement rate raster for the period 2015-2019 | ILU_InSAR_long_term_displacement_rate_raster_R_2015-2019.tif | |||||
| 2015-2019 maps of average seasonal ground surface displacement and long-term displacement rate | Inversion's performance metrics - Coefficient of determination (R2) | ILU_InSAR_inversion_R2_coeff_2015-2019.tif | Color_scale_LC_non_veget.txt | ||||
| Land cover classification | Non-vegetated land cover classes | ILU_RFC_land_cover_non_veget_classes_2016-2017.tif | Color_scale_LC_veget.txt | ||||
| Land cover classification | Vegetated land cover classes | ILU_RFC_land_cover_veget_classes_2016-2017.tif | |||||
| Extrapolated active layer thicknesses | Active layer thicknesses (2020-2021) extrapolated based on land cover classification | ILU_extrapolated_ALT_from_land_cover_2020-2021.tif | |||||
| Frost susceptibility index | Frost susceptibility index (2015-2019) derived from average seasonal displacements and extrapolated active layer thicknesses | ILU_FSI_2015-2019.tif | |||||
| Ground truth data | Ground truth data file including active layer thickness measurements and vegetation surveys conducted in 2020 and 2021 | ILU_ALT_measurements_Vegetation_surveys_2020-2021.txt | |||||
| README | Metadata.pdf |