Helm, Veit; Franke, Steven; Haas, Christian; Hames, Oceane (2025): AWI airborne laserscanner (ALS) data products over Atka Bay landfast sea ice (East Antarctica) during the ANTSI campaign acquired on December 5, 2022 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.982610
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Published: 2025-10-27 • DOI registered: 2025-11-17
Abstract:
This dataset contains three airborne laserscanner data products (1: Digital Elevation Model of the ice/snow surface, 2: topographic surface roughness, 3: Laser reflectivity map) acquired over Atka Bays landfast sea ice during the Antarctic season of 2022/23 (date of aquisition: December 5th, 2022). The data set covers significant parts of Atka Bay focusing on areas where icebergs were embedded in the landfast sea ice. The scientific focus was to investigate the influence of iceberg on wind-driven snow distribution and slush formation on Antarctic landfast sea ice. The data are available as Geotiff files and have the following coordinate system: EPSG:3031 - WGS 84 / Antarctic Polar Stereographic.
Keyword(s):
Related to:
Haas, Christian; Hames, Oceane; Helm, Veit; Franke, Steven; Jutila, Arttu (2025): ANT 2022/23: AWI airborne ultra-wideband microwave radar data over Atka Bay's iceberg-laden landfast sea ice, Dronning Maud Land, East Antarctica (ANTSI Project) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.981151
References:
Wilson, Margaret F J; O'Connell, Brian; Brown, Colin; Guinan, Janine C; Grehan, Anthony J (2007): Multiscale Terrain Analysis of Multibeam Bathymetry Data for Habitat Mapping on the Continental Slope. Marine Geodesy, 30(1-2), 3-35, https://doi.org/10.1080/01490410701295962
Funding:
Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven (AWI), grant/award no. AWI_PA_02135: ANTSI - Antarctic Sea Ice: Thickness, Melt Ponding, and Ice Shelf Interaction
Coverage:
Median Latitude: -70.659097 * Median Longitude: -8.287374 * South-bound Latitude: -70.659202 * West-bound Longitude: -8.287413 * North-bound Latitude: -70.658992 * East-bound Longitude: -8.287334
Date/Time Start: 2022-12-05T09:07:24 * Date/Time End: 2022-12-05T15:44:23
Event(s):
P5_238_ANTSI_2022_2212051101 * Latitude Start: -70.658992 * Longitude Start: -8.287334 * Latitude End: -70.659202 * Longitude End: -8.287413 * Date/Time Start: 2022-12-05T09:07:24 * Date/Time End: 2022-12-05T15:44:23 * Campaign: P5-238_ANTSI_2022 (ANTSI, MEP, Kottas-Aero) * Basis: POLAR 5 * Method/Device: Aircraft (AC)
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | File content | Content | Helm, Veit | |||
| 2 | Method comment | Method comm | Helm, Veit | |||
| 3 | Image area | Image area | Helm, Veit | Airborne laser scan | ||
| 4 | Width | Width | pixel | Helm, Veit | Airborne laser scan | |
| 5 | Height | Height | pixel | Helm, Veit | Airborne laser scan | |
| 6 | Data type | Data type | Helm, Veit | Airborne laser scan | ||
| 7 | Coordinate reference system | CRS | Helm, Veit | Airborne laser scan | ||
| 8 | Unit | Unit | Helm, Veit | Airborne laser scan | ||
| 9 | Pixel size | Pixel size | m | Helm, Veit | Airborne laser scan | |
| 10 | Image | IMAGE | Helm, Veit | Airborne laser scan |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
29 data points
Data
All files referred to in data matrix can be downloaded in one go as ZIP or TAR. Be careful: This download can be very large! To protect our systems from misuse, we require to sign up for an user account before downloading.
| 1 Content | 2 Method comm | 3 Image area | 4 Width [pixel] | 5 Height [pixel] | 6 Data type | 7 CRS | 8 Unit | 9 Pixel size [m] | 10 IMAGE |
|---|---|---|---|---|---|---|---|---|---|
| Digital Elevation Model of the ice/snow surface of Atka Bay | To generate a consistent DEM from ALS swaths, we analyzed each individual profile strip of the ALS DEM and adjusted its offset relative to intersecting ALS DEM strips, using a reference strip as a baseline. This approach corrects for tidal influences that cause variations in absolute sea level during data acquisition. | -303944.5, 2095085.5 : -274539.5, 2117977.5 | 29405 | 22892 | Float32 - Thirty two bit floating point | EPSG:3031 - WGS 84 / Antarctic Polar Stereographic | meters | 1.0 | ALS_mosaic_AtkaBay_DEM.tif |
| Topographic roughness of the ice/snow surface of Atka Bay derived from the ALS DEM | We computed topographic roughness as the largest inter-cell difference over a central pixel and its surrounding cell as defined in Wilson et al., 2007 (https://doi.org/10.1080/01490410701295962). | -303944.5, 2095085.5 : -274539.5, 2117977.5 | 11762 | 9157 | Float32 - Thirty two bit floating point | EPSG:3031 - WGS 84 / Antarctic Polar Stereographic | meters | 2.5 | ALS_mosaic_AtkaBay_Topographic_Roughness.tif |
| Surface reflectivity at the wavelength of the laserscanner over Atka Bay | -303944.5, 2095085.5 : -274539.5, 2117977.5 | 11388 | 8155 | Float32 - Thirty two bit floating point | EPSG:3031 - WGS 84 / Antarctic Polar Stereographic | meters | 2.5 | ALS_mosaic_AtkaBay_Reflectivity.tif |