Laser altimeter data obtained over sea-ice during the PAMARCMIP campaign in Apr, 2009

• Main Authors: Hendricks, Stefan, Haas, Christian, Krumpen, Thomas
• Format: Dataset
• Language: English
• Published: PANGAEA
• Subjects: DATE/TIME; Event label; HEIGHT above ground; Laser Altimeter; LATITUDE; Lead event (true/false); LONGITUDE; PAMARCMIP_2009; PAMARCMIP_2009_SBLA_20090405T121130; PAMARCMIP_2009_SBLA_20090405T122006; PAMARCMIP_2009_SBLA_20090405T123109; PAMARCMIP_2009_SBLA_20090405T125615; PAMARCMIP_2009_SBLA_20090406T102637; PAMARCMIP_2009_SBLA_20090406T105428; PAMARCMIP_2009_SBLA_20090406T112333; PAMARCMIP_2009_SBLA_20090409T160931; PAMARCMIP_2009_SBLA_20090409T163327; PAMARCMIP_2009_SBLA_20090410T190815; PAMARCMIP_2009_SBLA_20090410T193335; PAMARCMIP_2009_SBLA_20090410T200956; PAMARCMIP_2009_SBLA_20090410T204157; PAMARCMIP_2009_SBLA_20090410T211823; PAMARCMIP_2009_SBLA_20090410T215626; PAMARCMIP_2009_SBLA_20090411T154114; PAMARCMIP_2009_SBLA_20090411T171845; PAMARCMIP_2009_SBLA_20090411T174444; PAMARCMIP_2009_SBLA_20090411T222216; PAMARCMIP_2009_SBLA_20090416T203633; PAMARCMIP_2009_SBLA_20090416T205607; PAMARCMIP_2009_SBLA_20090416T212058; PAMARCMIP_2009_SBLA_20090416T214709; PAMARCMIP_2009_SBLA_20090416T221159; PAMARCMIP_2009_SBLA_20090416T224043; PAMARCMIP_2009_SBLA_20090425T205459; PAMARCMIP_2009_SBLA_20090425T211528; PAMARCMIP_2009_SBLA_20090425T213458; PAMARCMIP_2009_SBLA_20090425T220022; PAMARCMIP_2009_SBLA_20090426T181730; PAMARCMIP_2009_SBLA_20090426T183707; PAMARCMIP_2009_SBLA_20090426T185932; PAMARCMIP_2009_SBLA_20090426T192006; POINT DISTANCE from start; POLAR 5; Ridge boundary; left; right; Ridge Height; maximum; Sea ice
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.969282

Sea ice surface roughness data were obtained during the PAMARCMIP campaign in Apr, 2009 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-5). 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 20090426T1417. 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]