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Data Publisher for Earth & Environmental Science

Krumpen, Thomas; Haas, Christian; Hendricks, Stefan: Laser altimeter data obtained over sea-ice during the PS92 campaign in May-Jun, 2015 [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.969319 (dataset in review)

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Abstract:
Sea ice surface roughness data were obtained during the PS92 campaign in May-Jun, 2015 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 20150619T1014. 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
Coverage:
Median Latitude: 81.340257 * Median Longitude: 16.554827 * South-bound Latitude: 80.871969 * West-bound Longitude: 8.229456 * North-bound Latitude: 82.053504 * East-bound Longitude: 23.761259
Date/Time Start: 2015-05-27T11:49:58 * Date/Time End: 2015-06-19T14:44:17
Event(s):
PS92_SBLA_20150527T114958 * Latitude Start: 80.871969 * Longitude Start: 18.298436 * Latitude End: 81.190434 * Longitude End: 16.758481 * Date/Time Start: 2015-05-27T11:49:58 * Date/Time End: 2015-05-27T12:12:25 * Sensor URI: registry.o2a-data.de * Campaign: PS92 (ARK-XXIX/1, TRANSSIZ) * Basis: Polarstern * Method/Device: Single beam laser altimeter (SBLA)
PS92_SBLA_20150601T090813 * Latitude Start: 81.271086 * Longitude Start: 17.173705 * Latitude End: 81.328534 * Longitude End: 17.243845 * Date/Time Start: 2015-06-01T09:08:13 * Date/Time End: 2015-06-01T09:11:57 * Sensor URI: registry.o2a-data.de * Campaign: PS92 (ARK-XXIX/1, TRANSSIZ) * Basis: Polarstern * Method/Device: Single beam laser altimeter (SBLA)
PS92_SBLA_20150601T092823 * Latitude Start: 81.320143 * Longitude Start: 17.369570 * Latitude End: 81.319350 * Longitude End: 16.895335 * Date/Time Start: 2015-06-01T09:28:23 * Date/Time End: 2015-06-01T09:31:27 * Sensor URI: registry.o2a-data.de * Campaign: PS92 (ARK-XXIX/1, TRANSSIZ) * Basis: Polarstern * Method/Device: Single beam laser altimeter (SBLA)
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1Event labelEventKrumpen, Thomas
2DATE/TIMEDate/TimeKrumpen, ThomasGeocode
3Time in secondsTimesKrumpen, Thomas
4LATITUDELatitudeKrumpen, ThomasGeocode
5LONGITUDELongitudeKrumpen, ThomasGeocode
6POINT DISTANCE from startDistmKrumpen, ThomasGeocode
7HEIGHT above groundHeightmKrumpen, ThomasSingle beam laser altimeter (SBLA)Geocode
8Surface elevationSurf elevmKrumpen, ThomasSingle beam laser altimeter (SBLA)Height of the sea ice surface relative to the level ice
9Ridge height, maximumRidge height maxmKrumpen, ThomasSingle beam laser altimeter; processed with laser_Altimeter_Processing_VS5_06_20.pyHigest point of a pressure ridge sail
10Ridge boundary, leftRidge bound leftmKrumpen, ThomasSingle beam laser altimeter; processed with laser_Altimeter_Processing_VS5_06_20.pyLeft boundary of identified pressure ridge sail
11Ridge boundary, rightRidge bound rightmKrumpen, ThomasSingle beam laser altimeter; processed with laser_Altimeter_Processing_VS5_06_20.pyRight boundary of identified pressure ridge sail
12Ridge widthRidge widthmKrumpen, ThomasSingle beam laser altimeter; processed with laser_Altimeter_Processing_VS5_06_20.pyWidth of pressure ridge sail
13Ridge spacing, typicalRidge spacingmKrumpen, ThomasSingle beam laser altimeter; processed with laser_Altimeter_Processing_VS5_06_20.pyDistance to preceding ridge sail
14Lead event (true/false)Lead eventKrumpen, ThomasSingle 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
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
3347872 data points

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