Krumpen, Thomas; Haas, Christian; Hendricks, Stefan (2024): Laser altimeter data obtained over sea-ice during the Transdrift-XIII campaign in Apr-May, 2008; profile Transdrift-XIII_SBLA_20080416T0447_74.35_125.91_thr06_data_Vers5 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.971095, In: Krumpen, Thomas; Haas, Christian; Hendricks, Stefan (2024): Laser altimeter data obtained over sea-ice during the Transdrift-XIII campaign in Apr-May, 2008 [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.971105
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Abstract:
Sea ice surface roughness data were obtained during the Transdrift-XIII campaign in Apr-May, 2008 with a Single Beam Laser Altimeter (SBLA) mounted inside an electromagnetic system (EM-Bird) towed at 10-30 m height above surface by a Helicopter (Mil MI-8). A method developed by Hibler (1972) was used to a) isolate the surface profile from low-frequency variations associated with the aircraft motion and b) to identify pressure ridge sails. The processing steps are described in https://epic.awi.de/id/eprint/56364/. We applied a ridge detection threshold of 0.6 m, which means that only sails higher 0.6 m are detected. Version and name of the processing routine: Laser_Altimeter_Processing_VS5_06_20.py (vers.5, Feb 22, 2024, https://gitlab.awi.de/sitem/sbla_processing.git). SBLA records (RIEGL - LD90) are provided at a sampling rate of 100 Hz. Sensor accuracy is 5 cm with a beam diameter at surface of 5.8 cm. This specific dataset was obtained on 20080416T0447. It includes recorded altimeter readings, the derived surface elevation and width/height/spacing of detected pressure ridge sails. Note on data quality: 5.8 cm . File name: [DMS/PANGAEA Campaing Identifier] + [DEVICE] + [DATE/TIME] + [LAT/LON] + [Detection Threshold] + [Object] + [Version] + [Format]
Supplement to:
Krumpen, Thomas; von Albedyll, Luisa; Bünger, Hans Jakob; Castellani, Giulia; Hartmann, Jörg; Helm, Veit; Hendricks, Stefan; Hutter, Nils; Landy, Jack; Lisovski, Simeon; Lüpkes, Christof; Rohde, Jan; Suhrhoff, Mira; Haas, Christian (in review): Smoother ice in a more dynamic Arctic: 30
years of airborne pressure ridge observations. Nature Climate Change
Related to:
Etienne, Jean-Louis (2008): Total Pole Airship - An expedition led by Jean-Louis Etienne. www.jeanlouisetienne.com, 13 pp, hdl:10013/epic.39583.d001
Related code / software:
Data processing report:
Suhrhoff, Mira (2021): Sea Ice Surface Roughness from Single Beam Laser Altimeter Measurements - Method Development and Comparison with Airborne Laser Scanner Profiles [thesis]. Universität Trier, hdl:10013/epic.30c63deb-b1f5-4c1e-927b-3d8a8d495b82
Coverage:
Median Latitude: 74.352529 * Median Longitude: 125.914932 * South-bound Latitude: 74.285228 * West-bound Longitude: 125.277220 * North-bound Latitude: 74.417610 * East-bound Longitude: 126.568690
Date/Time Start: 2008-04-16T04:46:37 * Date/Time End: 2008-04-16T05:05:45
Event(s):
Transdrift-XIII_SBLA_20080416T044637 * Latitude Start: 74.285228 * Longitude Start: 126.568690 * Latitude End: 74.417610 * Longitude End: 125.277220 * Date/Time Start: 2008-04-16T04:46:37 * Date/Time End: 2008-04-16T05:05:45 * O2A Registry URI: registry.o2a-data.de * Campaign: Transdrift-XIII * Basis: Helicopter * Method/Device: Single beam laser altimeter (SBLA)
Parameter(s):
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
204418 data points
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