https://doi.pangaea.de/10.1594/PANGAEA.996933Ringel, Maximilian HaraldMaximilian HaraldRingel0000-0002-0600-135XInstitute of Environmental Physics, University of BremenSpreen, GunnarGunnarSpreen0000-0003-0165-8448Institute of Environmental Physics, University of BremenKrumpen, ThomasThomasKrumpen0000-0001-6234-8756Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, BremerhavenNeudert, MaraMaraNeudertAlfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, BremerhavenPANGAEA2026ArcticCONTRASTS expeditionelectromagnetic inductionGEM-2Geophexmagnaprobemelt pond depthoceanPS149RV PolarsternSea iceSea ice thicknesssnow depthDATE/TIMELATITUDELONGITUDESea ice and snow thicknessBroadband electromagnetic sensorGround-based Electromagnetic Induction Sounding Device, GEM-2, Geophex LtdPS149PolarsternArctic Amplification (AC3)2025-08-01T14:38:22/2025-08-01T15:46:09Datasethttps://doi.pangaea.de/10.1594/PANGAEA.99690710.57738/BZPM_0808_2026157054 data pointstext/tab-separated-valuesCreative Commons Attribution 4.0 InternationalThis dataset contains the total ice thickness estimates from a walk across the sea ice floe (called long transect) during ice station PS149_25-1 (floe 2b) of the PS149 CONTRASTS expedition. The long transect was traversed across the ice floe to obtain statistically representative distributions of ice thickness. The transect was marked with flags at its corner points to ensure that a similar track was measured during repeated visits to the ice floe. A Geophex Ltd. GEM2-730 instrument was used. Total sea ice thickness refers to the distance between the instrument and the ice–ocean interface. Accordingly, if present, snow / surface scattering layer (SSL) or melt pond depth must be subtracted from this total thickness to obtain the actual sea ice thickness estimate. The snow / SSL and melt pond depths were measured along the same transect track with a MagnaProbe and can be found in the other dataset of this collection: https://doi.pangaea.de/10.1594/PANGAEA.996934. Since the GEM and MagnaProbe measurements at this station were conducted on two consecutive days, ice floe drift between the surveys would make precise spatio-temporal co-location of the datasets unreliable. Therefore, the measurements are provided as separate datasets without any drift correction. However, both were collected along the same marked transect track. The measurements of all other PS149 ice stations are co-located and available here: doi:10.1594/PANGAEA.996908. More detailed explanations about the data processing and the co-location of both measurements can be found in the comment section of the dataset collection: https://doi.pangaea.de/10.1594/PANGAEA.996907.18.882242218.990751383.730056883.738121Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhavenhttps://doi.org/10.13039/501100003207AWI_PS149_01Sea Ice Physics (CONTRASTS)German Research Foundationhttps://doi.org/10.13039/501100001659268020496TRR 172: ArctiC Amplification: Climate Relevant Atmospheric and SurfaCe Processes, and Feedback Mechanisms