Rückert, Janna Elisabeth; Bühler, Linnu; Walbröl, Andreas: Snow, surface layer and ice permittivity at 50 MHz measured during RV POLARSTERN cruise PS149 [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.995135 (dataset in review)
Abstract:
During the Polarstern cruise PS149 from July 2025 to August 2025 in the Atlantic part of the Arctic Ocean dielectric permittivity and dielectric loss of the snow and ice were measured by impedance measurements at 50 MHz during 29 ice stations. Measurements were performed using the Stevens Water Monitoring Systems Hydra Probe Sensor. The cylindrical measurement region of the sensor has a length of 5.7 cm and a diameter of 3 cm. Snow and surface scattering layer (SSL) were measured by inserting the probe tines of the device either vertically or horizontally (in a snowpit), details in the "Comment" column. Ice core samples were obtained with a 9 cm corer. Then a positioning device was used to drill four 3mm holes vertically into the ice core for the Hydra Probe Sensor's central waveguide and outer rods. At what depth the ice was sampled is contained in the "Core depth [m]" column (either one depth or a range), where 0 m is the ice surface.
The sample type (snow, surface scattering layer (SSL) or ice) is denoted in the "Sample Type" column of the dataset. For all measurements a response was recorded and a repeat measurement was performed right after. The dataset also contains temperature, salinity and density measurements (all independent of the device) of the sampled snow or ice cores, these datasets are part of the VAMPIRE-2 data bibliography https://doi.org/10.1594/PANGAEA.990497. The ice cores are identifiable by the column "unique core number" corresponding to the number used in the ice core datasets of that bibliography. Note that an intercomparison of the salinometer with two others revealed a bias, which is described in the attached PDF and corrected for in the columns "Salinity corrected" . All measurements were done within the vicinity of the footprint of the onboard microwave radiometers installed for the VAMPIRE project , that is, in about 25 m distance to the port bow of Polarstern), further defined in the "Location" column. For more information about these measurements the user is referred to Chapter 3 of the cruise report.
Related to:
Bühler, Linnu; Rückert, Janna Elisabeth; Walbröl, Andreas; Mech, Mario; Krobot, Pavel; Ebell, Kerstin; Schnitt, Sabrina; Spreen, Gunnar (2026): Water vapor, mixed-phase clouds, precipitation and sea ice emissivity over the Central Arctic Ocean (VAMPIRE-2): remote sensing and in-situ measurements suite during POLARSTERN cruise PS149 (CONTRASTS) [dataset bibliography]. PANGAEA, https://doi.org/10.1594/PANGAEA.990497
Nicolaus, Marcel (2026): The Expedition PS149 of the Research Vessel POLARSTERN to the Arctic Ocean in 2025. Berichte zur Polar- und Meeresforschung = Reports on Polar and Marine Research, 808, 382 pp, https://doi.org/10.57738/BZPM_0808_2026
Further details:
Rückert, Janna Elisabeth (2026): Salinometer: Instrument intercomparison and bias correction for PS149 datasets. PS144_Salinometer_instrument_intercomparison_biascorrection.pdf
Project(s):
Arctic Amplification (AC3)
Funding:
Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven (AWI), grant/award no. AWI_PS149_07: VAMPIRE-2
German Research Foundation (DFG), grant/award no. 268020496: TRR 172: ArctiC Amplification: Climate Relevant Atmospheric and SurfaCe Processes, and Feedback Mechanisms
Coverage:
Median Latitude: 83.595913 * Median Longitude: 9.206071 * South-bound Latitude: 82.411350 * West-bound Longitude: -17.902200 * North-bound Latitude: 84.944320 * East-bound Longitude: 33.998100
Date/Time Start: 2025-07-09T17:48:00 * Date/Time End: 2025-08-27T12:43:00
Minimum DEPTH, ice/snow: 0.000 m * Maximum DEPTH, ice/snow: 1.870 m
Event(s):
PS149_13-1 (Ice Station 1a) * Latitude Start: 83.804469 * Longitude Start: 20.753587 * Latitude End: 83.856951 * Longitude End: 24.252349 * Date/Time Start: 2025-07-09T06:32:22 * Date/Time End: 2025-07-12T18:25:00 * Elevation Start: -4073.9 m * Elevation End: -4071.5 m * O2A Registry URI: https://registry.o2a-data.de/items/8891 * Campaign: PS149 (CONTRASTS; ArcWatch 3) * Basis: Polarstern * Method/Device: Ice station (ICE) * Comment: # Ice Station 1a; Sea ice 1.4m thick on Gangway
PS149_13-2 * Latitude: 83.781185 * Longitude: 20.796691 * Date/Time: 2025-07-09T11:37:09 * Elevation: -4075.2 m * O2A Registry URI: https://registry.o2a-data.de/items/5460 * Campaign: PS149 (CONTRASTS; ArcWatch 3) * Basis: Polarstern * Method/Device: CTD/Rosette (CTD-RO) * Comment: 4042 m; EL31; failure altimeter software
PS149_13-3 * Latitude Start: 83.762079 * Longitude Start: 20.840436 * Latitude End: 83.761559 * Longitude End: 20.842474 * Date/Time Start: 2025-07-09T14:30:09 * Date/Time End: 2025-07-09T14:35:09 * Elevation Start: -4078.0 m * Elevation End: -4077.5 m * O2A Registry URI: https://registry.o2a-data.de/items/3167 * Campaign: PS149 (CONTRASTS; ArcWatch 3) * Basis: Polarstern * Method/Device: Hand net (HN)
Parameter(s):
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:
3599 data points
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