PANGAEA_969493 Laser altimeter data obtained over sea-ice during the ARK-XII campaign in Jul-Sep, 1996; profile ARK-XII_SBLA_19960808T1230_85.40_110.95_thr06_data_Vers5 Haas, Christian; Hendricks, Stefan; Krumpen, Thomas Laser altimeter data obtained over sea-ice during the ARK-XII campaign in Jul-Sep, 1996; profile ARK-XII_SBLA_19960808T1230_85.40_110.95_thr06_data_Vers5 2024-07-12 PANGAEA Dataset https://doi.pangaea.de/10.1594/PANGAEA.969493 Investigator Christian Haas christian.haas@awi.de Earth Science DATE/TIME Time in seconds LATITUDE LONGITUDE POINT DISTANCE from start HEIGHT above ground Surface elevation Ridge height, maximum Ridge boundary, left Ridge boundary, right Ridge width Ridge spacing, typical geoscientificInformation ARK-XII ARK-XII_SBLA_19960808T123000 Laser Altimeter Ridge Height Ridge Spacing Ridge Width Sea Ice Surface Roughness Single beam laser altimeter Single beam laser altimeter Single beam laser altimeter; processed with laser_Altimeter_Processing_VS5_06_20.py Polarstern 1996-08-08 1996-08-08 Complete 85.389999 85.400002 108.96965 112.97 unrestricted CC-BY-4.0: Creative Commons Attribution 4.0 International English PANGAEA Data Publisher for Earth & Environmental Science https://www.pangaea.de/ Data Center Contact Michael Diepenbroek info@pangaea.de

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Bremen Bremen 28359 Germany online 342635 data points text/tab-separated-values 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 (2025): Smoother sea ice with fewer pressure ridges in a more dynamic Arctic. Nature Climate Change, https://doi.org/10.1038/s41558-024-02199-5 Augstein, Ernst (1997): Die Expedition ARCTIC 96 des FS Polarstern (ARK XII) mit der Arctic Climate System Study (ACSYS) (The Expedition ARCTIC 96 of RV Polarstern (ARK XII) with the Arctic Climate System Study (ACSYS)). Berichte zur Polarforschung = Reports on Polar Research, 234, 54 pp, https://doi.org/10.2312/BzP_0234_1997 Electromagnetic induction sounding of sea-ice thickness / SBLA_Processing · GitLab (URI: https://gitlab.awi.de/sitem/sbla_processing.git) 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

Sea ice surface roughness data were obtained during the ARK-XII campaign in Jul-Sep, 1996 with a Single Beam Laser Altimeter (SBLA) mounted on an/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 (IBEO - PS100E) are provided at a sampling rate of 200 Hz. Sensor accuracy is 3 cm with a beam diameter at surface of 11.4 cm. This specific dataset was obtained on 19960808T1230. It includes recorded altimeter readings, the derived surface elevation and width/height/spacing of detected pressure ridge sails. Note on data quality: 11.4 cm . File name: [DMS/PANGAEA Campaing Identifier] + [DEVICE] + [DATE/TIME] + [LAT/LON] + [Detection Threshold] + [Object] + [Version] + [Format] ** For all details see the full metadata description at "https://doi.pangaea.de/10.1594/PANGAEA.969493"!

http://en.wikipedia.org/wiki/Height HEIGHT above ground http://en.wikipedia.org/wiki/ISO_6709 LATITUDE http://en.wikipedia.org/wiki/ISO_6709 LONGITUDE http://en.wikipedia.org/wiki/ISO_8601 DATE/TIME http://en.wikipedia.org/wiki/Time Time in seconds https://doi.org/10.1038/s41558-024-02199-5 Smoother sea ice with fewer pressure ridges in a more dynamic Arctic https://doi.org/10.17815/jlsrf-3-163 Polarstern https://doi.org/10.2312/BzP_0234_1997 ARK-XII https://doi.org/10.2312/BzP_0234_1997 Die Expedition ARCTIC 96 des FS Polarstern (ARK XII) mit der Arctic Climate System Study (ACSYS) (The Expedition ARCTIC 96 of RV Polarstern (ARK XII) with the Arctic Climate System Study (ACSYS)) https://gitlab.awi.de/sitem/sbla_processing.git Electromagnetic induction sounding of sea-ice thickness / SBLA_Processing · GitLab https://gitlab.awi.de/sitem/sbla_processing.git Single beam laser altimeter; processed with laser_Altimeter_Processing_VS5_06_20.py https://hdl.handle.net/10013/epic.30c63deb-b1f5-4c1e-927b-3d8a8d495b82 Sea Ice Surface Roughness from Single Beam Laser Altimeter Measurements - Method Development and Comparison with Airborne Laser Scanner Profiles https://www.awi.de/en/about-us/organisation/staff/single-view/christian-haas.html PANGAEA_969539 DIF 9.4 2024-07-12 2025-04-22