Laser altimeter data obtained over sea-ice during the IceBird Summer campaign in Jul-Aug, 2018

• Main Authors: Krumpen, Thomas, Haas, Christian, Hendricks, Stefan
• Format: Dataset
• Language: English
• Published: PANGAEA
• Subjects: DATE/TIME; Event label; HEIGHT above ground; Laser Altimeter; LATITUDE; Lead event (true/false); LONGITUDE; P6_211_ASIMBO_2018_SBLA_20180731T135646; P6_211_ASIMBO_2018_SBLA_20180731T143915; P6_211_ASIMBO_2018_SBLA_20180731T152448; P6_211_ASIMBO_2018_SBLA_20180731T155813; P6_211_ASIMBO_2018_SBLA_20180801T065819; P6_211_ASIMBO_2018_SBLA_20180801T073637; P6_211_ASIMBO_2018_SBLA_20180801T081525; P6_211_ASIMBO_2018_SBLA_20180801T085159; P6_211_ASIMBO_2018_SBLA_20180801T092829; P6_211_ASIMBO_2018_SBLA_20180801T103515; P6_211_ASIMBO_2018_SBLA_20180801T111702; P6_211_ASIMBO_2018_SBLA_20180801T115945; P6_211_ASIMBO_2018_SBLA_20180801T122401; P6_211_ASIMBO_2018_SBLA_20180804T114920; P6_211_ASIMBO_2018_SBLA_20180804T120820; P6_211_ASIMBO_2018_SBLA_20180804T122418; P6_211_ASIMBO_2018_SBLA_20180811T113045; P6_211_ASIMBO_2018_SBLA_20180811T115715; P6_211_ASIMBO_2018_SBLA_20180811T142818; P6_211_ASIMBO_2018_SBLA_20180811T144108; P6_211_ASIMBO_2018_SBLA_20180811T151306; P6_211_ASIMBO_2018_SBLA_20180811T154744; P6_211_ASIMBO_2018_SBLA_20180811T160137; P6_211_ASIMBO_2018_SBLA_20180812T111558; P6_211_ASIMBO_2018_SBLA_20180812T113649; P6_211_ASIMBO_2018_SBLA_20180812T120621; P6_211_ASIMBO_2018_SBLA_20180812T125803; P6_211_ASIMBO_2018_SBLA_20180812T140150; P6_211_ASIMBO_2018_SBLA_20180812T142044; P6_211_ASIMBO_2018_SBLA_20180812T143400; P6_211_ASIMBO_2018_SBLA_20180813T105935; P6_211_ASIMBO_2018_SBLA_20180813T112549; P6_211_ASIMBO_2018_SBLA_20180813T122839; P6_211_ASIMBO_2018_SBLA_20180813T125657; P6_211_ASIMBO_2018_SBLA_20180813T132116; P6_211_ASIMBO_2018_SBLA_20180813T134540; P6-211_ASIMBO_2018; POINT DISTANCE from start; POLAR 6; Ridge boundary; left; right; Sea ice
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.969297

Sea ice surface roughness data were obtained during the IceBird Summer campaign in Jul-Aug, 2018 with a Single Beam Laser Altimeter (SBLA) mounted inside an electromagnetic system (EM-Bird) towed at 10-30 m height above surface by an Airplane (Basler BT-67, Polar-6). 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 (ASTECH - LDM) are provided at a sampling rate of 100 Hz. Sensor accuracy is 2 cm with a beam diameter at surface of 6.3 cm. This dataset includes recorded altimeter readings, the derived surface elevation and width/height/spacing of detected pressure ridge sails. Note on data quality: 6.3 cm . File name: [DMS/PANGAEA Campaing Identifier] + [DEVICE] + [DATE/TIME] + [LAT/LON] + [Detection Threshold] + [Object] + [Version] + [Format]