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Data Publisher for Earth & Environmental Science

Lange, Benjamin Allen; Haas, Christian; Hendricks, Stefan; Krumpen, Thomas (2024): Laser altimeter data obtained over sea-ice during the PS106/2 campaign in Jun-Jul, 2017; profile PS106-2_SBLA_20170702T0645_82.21_32.15_thr06_data_Vers5 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.970812, In: Lange, Benjamin Allen; Haas, Christian; Hendricks, Stefan; Krumpen, Thomas (2024): Laser altimeter data obtained over sea-ice during the PS106/2 campaign in Jun-Jul, 2017 [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.970832

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Abstract:
Sea ice surface roughness data were obtained during the PS106/2 campaign in Jun-Jul, 2017 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 (RV-Polarstern Helicopter). 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 20170702T0645. 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]
Keyword(s):
Laser Altimeter; Ridge Height; Ridge Spacing; Ridge Width; Sea Ice Surface Roughness
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:
Macke, Andreas; Flores, Hauke (2018): The Expeditions PS106/1 and 2 of the Research Vessel POLARSTERN to the Arctic Ocean in 2017. Berichte zur Polar- und Meeresforschung = Reports on Polar and Marine Research, 719, 171 pp, https://doi.org/10.2312/BzPM_0719_2018
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: 82.207740 * Median Longitude: 32.146610 * South-bound Latitude: 82.116620 * West-bound Longitude: 31.193353 * North-bound Latitude: 82.255214 * East-bound Longitude: 32.630777
Date/Time Start: 2017-07-02T10:34:18 * Date/Time End: 2017-07-02T10:53:05
Event(s):
PS106-2_SBLA_20170702T103418 * Latitude Start: 82.116620 * Longitude Start: 32.557147 * Latitude End: 82.195744 * Longitude End: 31.193353 * Date/Time Start: 2017-07-02T10:34:18 * Date/Time End: 2017-07-02T10:53:05 * O2A Registry URI: registry.o2a-data.de * Campaign: PS106/2 (ARK-XXXI/1.2) * Basis: Polarstern * Method/Device: Single beam laser altimeter (SBLA)
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1DATE/TIMEDate/TimeLange, Benjamin AllenGeocode
2Time in secondsTimesLange, Benjamin Allen
3LATITUDELatitudeLange, Benjamin AllenGeocode
4LONGITUDELongitudeLange, Benjamin AllenGeocode
5POINT DISTANCE from startDistmLange, Benjamin AllenGeocode
6HEIGHT above groundHeightmLange, Benjamin AllenSingle beam laser altimeter (SBLA)Geocode
7Surface elevationSurf elevmLange, Benjamin AllenSingle beam laser altimeter (SBLA)Height of the sea ice surface relative to the level ice
8Ridge height, maximumRidge height maxmLange, Benjamin AllenSingle beam laser altimeter; processed with laser_Altimeter_Processing_VS5_06_20.pyHigest point of a pressure ridge sail
9Ridge boundary, leftRidge bound leftmLange, Benjamin AllenSingle beam laser altimeter; processed with laser_Altimeter_Processing_VS5_06_20.pyLeft boundary of identified pressure ridge sail
10Ridge boundary, rightRidge bound rightmLange, Benjamin AllenSingle beam laser altimeter; processed with laser_Altimeter_Processing_VS5_06_20.pyRight boundary of identified pressure ridge sail
11Ridge widthRidge widthmLange, Benjamin AllenSingle beam laser altimeter; processed with laser_Altimeter_Processing_VS5_06_20.pyWidth of pressure ridge sail
12Ridge spacing, typicalRidge spacingmLange, Benjamin AllenSingle beam laser altimeter; processed with laser_Altimeter_Processing_VS5_06_20.pyDistance to preceding ridge sail
13Lead event (true/false)Lead eventLange, Benjamin AllenSingle beam laser altimeter; processed with laser_Altimeter_Processing_VS5_06_20.pyIf set to 1, then EM-Bird based sea-ice thickness is below 0.2 m (lead/open water). Note that EM-Bird data is provided at a sampling rate of 10 Hz
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
194760 data points

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