Jutila, Arttu; King, Joshua; Ricker, Robert; Hendricks, Stefan; Helm, Veit; Binder, Tobias; Haas, Christian (2021): Airborne low-altitude snow depth on sea ice during aircraft flight P6_217_ICEBIRD_2019_1904081301, Version 1 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.932787, In: Jutila, A et al. (2021): Airborne snow depth on sea ice during the IceBird Winter 2019 campaign in the Arctic Ocean, Version 1 [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.932790
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Abstract:
Airborne observations of snow depth on sea ice were made in April 2019 during the winter campaign of the AWI IceBird campaign series. The data consist of five surveys, some with overlapping segments at low and high altitude, spanning sea-ice covered areas in the Lincoln Sea, Central Arctic Ocean, as well as the Beaufort Sea. For each flight, the geolocated snow depth data from an airborne frequency-modulated continuous-wave ultrawideband radar using an algorithm based on signal peakiness are provided with a point spacing of approximately 4-5 meters for low-altitude flights and 7-9 meters for high-altitude flights. The trajectory data contain the full and unfiltered data record with quality flags. Longer sections of altitude-flagged data in the low-altitude data arise from calibrations of an EM sensor. Each snow depth value represents the average depth within the radar footprint that has a theoretical smooth surface cross-/along-track diameter of 2.6/1.0 m at low altitude and 7.2/5.1 m at the high altitude.
Related to:
Jutila, Arttu; King, Joshua; Paden, John D; Ricker, Robert; Hendricks, Stefan; Polashenski, Chris; Helm, Veit; Binder, Tobias; Haas, Christian (2021): High-Resolution Snow Depth on Arctic Sea Ice From Low-Altitude Airborne Microwave Radar Data. IEEE Transactions on Geoscience and Remote Sensing, 1-16, https://doi.org/10.1109/TGRS.2021.3063756
Project(s):
Sea Ice Physics @ AWI (AWI_SeaIce)
Coverage:
Median Latitude: 71.229454 * Median Longitude: -126.702871 * South-bound Latitude: 70.586757 * West-bound Longitude: -127.773433 * North-bound Latitude: 71.772216 * East-bound Longitude: -124.328323
Date/Time Start: 2019-04-08T17:07:45 * Date/Time End: 2019-04-08T18:26:10
Event(s):
P6_217_ICEBIRD_2019_1904081301 * Latitude Start: 68.305779 * Longitude Start: -133.493674 * Latitude End: 68.305775 * Longitude End: -133.493625 * Date/Time Start: 2019-04-08T15:19:23 * Date/Time End: 2019-04-08T19:53:22 * Location: Arctic * Campaign: P6-217_ICEBIRD_2019 (PAMARCMIP 2019) * Basis: POLAR 6 * Method/Device: Aircraft (AC)
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Reference/source | Reference | Jutila, Arttu | source file | ||
| 2 | Comment | Comment | Jutila, Arttu | Name of the interface picker algorithm used | ||
| 3 | DATE/TIME | Date/Time | Jutila, Arttu | Geocode | ||
| 4 | LATITUDE | Latitude | Jutila, Arttu | Internal Navigation System | Geocode | |
| 5 | LONGITUDE | Longitude | Jutila, Arttu | Internal Navigation System | Geocode | |
| 6 | Flight altitude | Flight altitude | m | Jutila, Arttu | ||
| 7 | Roll angle | Roll | deg | Jutila, Arttu | Internal Navigation System | |
| 8 | Pitch angle | Pitch | deg | Jutila, Arttu | Internal Navigation System | |
| 9 | Fast time range per bin | Fast time range | m | Jutila, Arttu | Airborne ultrawideband radar | delta fast time range (m per bin) |
| 10 | Bin number | Bin | Jutila, Arttu | Airborne ultrawideband radar | air_snow | |
| 11 | Bin number | Bin | Jutila, Arttu | Airborne ultrawideband radar | snow_ice | |
| 12 | Refractive index | Ref ind | Jutila, Arttu | Calculated | of snow, contains information on snow density, n=(1+0.51*snow_density)**(3/2), constant value | |
| 13 | Snow thickness | Snow thick | m | Jutila, Arttu | Calculated | |
| 14 | Snow thickness, uncertainty | Snow thick unc | m | Jutila, Arttu | Calculated | 0.044 m (Jutila et al., 2021), constant value |
| 15 | Surface topography, relative | h topo rel | m | Jutila, Arttu | Airborne Laserscanner (ALS) RIEGL VQ580 | surface topography estimate, difference of the 95th and 5th percentiles of the surface elevation within the radar footprint |
| 16 | Surface temperature | Surf temp | °C | Jutila, Arttu | Infrared radiation pyrometer, Heitronics, KT19.85II | from the KT19 within the radar footprint; no housing temperature available for accuracy |
| 17 | Flag | Flag | Jutila, Arttu | roll; 0; unless abs(roll) > 5°, then 1 | ||
| 18 | Flag | Flag | Jutila, Arttu | pitch; 0; unless abs(pitch) > 5°, then 1 | ||
| 19 | Flag | Flag | Jutila, Arttu | flight altitude; 0; unless altitude > 100 m, then 1 (only for low alt flights, EM-Bird calibration) | ||
| 20 | Flag | Flag | Jutila, Arttu | surface topo; 0; unless h_topo > 0.5 m, then 1 | ||
| 21 | Flag | Flag | Jutila, Arttu | surface temp;0; unless surf_temp > -5°C, then 1 |
Change history:
2021-09-14T14:11:21 – In the abstract, "7.2/13.0 m at the high altitude" was changed to "7.2/5.1 m at the high altitude"
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
978749 data points
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