Citation:

PANGAEA.969312 (dataset in review)

Name: Laser altimeter data obtained over sea-ice during the IceBird winter campaign in Apr, 2019
License: https://creativecommons.org/licenses/by/4.0/
Keywords: Laser Altimeter; Ridge Height; Ridge Spacing; Ridge Width; Sea Ice Surface Roughness

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Abstract:

Sea ice surface roughness data were obtained during the IceBird winter campaign in Apr, 2019 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 specific dataset was obtained on 20190410T1647. It 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]

Keyword(s):

Laser Altimeter; Ridge Height; Ridge Spacing; Ridge Width; Sea Ice Surface Roughness

Coverage:

Median Latitude: 74.841100 * Median Longitude: -117.612028 * South-bound Latitude: 70.044396 * West-bound Longitude: -132.759550 * North-bound Latitude: 84.498722 * East-bound Longitude: -54.361310

Date/Time Start: 2019-04-02T19:07:03 * Date/Time End: 2019-04-10T19:17:36

Event(s):

P6_217_ICEBIRD_2019_SBLA_20190402T190703 * Latitude Start: 82.045502 * Longitude Start: -94.999800 * Latitude End: 82.576984 * Longitude End: -97.771089 * Date/Time Start: 2019-04-02T19:07:03 * Date/Time End: 2019-04-02T19:30:14 * Sensor URI: registry.o2a-data.de * Campaign: (PAMARCMIP 2019) * Basis: POLAR 6 * Method/Device: (SBLA)

P6_217_ICEBIRD_2019_SBLA_20190402T193327 * Latitude Start: 82.646561 * Longitude Start: -98.160355 * Latitude End: 82.994324 * Longitude End: -100.363590 * Date/Time Start: 2019-04-02T19:33:27 * Date/Time End: 2019-04-02T19:49:45 * Sensor URI: registry.o2a-data.de * Campaign: (PAMARCMIP 2019) * Basis: POLAR 6 * Method/Device: (SBLA)

P6_217_ICEBIRD_2019_SBLA_20190402T195158 * Latitude Start: 83.039917 * Longitude Start: -100.647180 * Latitude End: 83.295229 * Longitude End: -102.498870 * Date/Time Start: 2019-04-02T19:51:58 * Date/Time End: 2019-04-02T20:04:18 * Sensor URI: registry.o2a-data.de * Campaign: (PAMARCMIP 2019) * Basis: POLAR 6 * Method/Device: (SBLA)

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Event label	Event		Hendricks, Stefan
2	DATE/TIME	Date/Time		Hendricks, Stefan		Geocode
3	Time in seconds	Time	s	Hendricks, Stefan
4	LATITUDE	Latitude		Hendricks, Stefan		Geocode
5	LONGITUDE	Longitude		Hendricks, Stefan		Geocode
6	POINT DISTANCE from start	Dist	m	Hendricks, Stefan		Geocode
7	HEIGHT above ground	Height	m	Hendricks, Stefan	Single beam laser altimeter (SBLA)	Geocode
8	Surface elevation	Surf elev	m	Hendricks, Stefan	Single beam laser altimeter (SBLA)	Height of the sea ice surface relative to the level ice
9	Ridge height, maximum	Ridge height max	m	Hendricks, Stefan	Single beam laser altimeter; processed with laser_Altimeter_Processing_VS5_06_20.py	Higest point of a pressure ridge sail
10	Ridge boundary, left	Ridge bound left	m	Hendricks, Stefan	Single beam laser altimeter; processed with laser_Altimeter_Processing_VS5_06_20.py	Left boundary of identified pressure ridge sail
11	Ridge boundary, right	Ridge bound right	m	Hendricks, Stefan	Single beam laser altimeter; processed with laser_Altimeter_Processing_VS5_06_20.py	Right boundary of identified pressure ridge sail
12	Ridge width	Ridge width	m	Hendricks, Stefan	Single beam laser altimeter; processed with laser_Altimeter_Processing_VS5_06_20.py	Width of pressure ridge sail
13	Ridge spacing, typical	Ridge spacing	m	Hendricks, Stefan	Single beam laser altimeter; processed with laser_Altimeter_Processing_VS5_06_20.py	Distance to preceding ridge sail
14	Lead event (true/false)	Lead event		Hendricks, Stefan	Single beam laser altimeter; processed with laser_Altimeter_Processing_VS5_06_20.py	If 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:

3987787 data points

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