https://doi.pangaea.de/10.1594/PANGAEA.996872Ringel, 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-2GeophexoceanPS149RV PolarsternSea iceSea ice thicknessTransectsDATE/TIMELATITUDELONGITUDELine IDRecord numberMarkerStatusQuality flag, positionALTITUDEMagnetic field, power-line frequencyIn-phase componentQuadrature componentQuadrature component, sumConductivity, apparentMagnetic susceptibility, volumeBroadband electromagnetic sensorGround-based Electromagnetic Induction Sounding Device, GEM-2, Geophex LtdPS149PolarsternArctic Amplification (AC3)2025-07-10T13:45:10/2025-07-10T15:25:04Datasethttps://doi.pangaea.de/10.1594/PANGAEA.99686910.57738/BZPM_0808_20262776692 data pointstext/tab-separated-valuesCreative Commons Attribution 4.0 InternationalThis dataset contains the raw electromagnetic induction (EM) measurements from a walk with the GEM instrument on a sledge across the ice floe (called long transect) conducted during the PS149 CONTRASTS expedition. The measurements were acquired using the Geophex Ltd. GEM-2-730 broadband EM sensor. During each ice station of the expedition (i.e., floe visit), a long transect was traversed across the ice floe to obtain statistically representative distributions of snow/pond depth and ice thickness. Each transect was marked with flags at its corner points to ensure that a similar track was measured during repeated visits to each ice floe. This dataset provides only the raw GEM measurements acquired along the transect for the indicated ice station (see title), including in-phase and quadrature responses, as well as electrical conductivity and magnetic susceptibility of sea ice and snow / melt ponds. These raw data enable users to apply various processing methods to, e.g., derive sea ice thickness. The measurements conducted during the other ice stations as well as further technical details about the data can be found in the collection: https://doi.pangaea.de/10.1594/PANGAEA.996869.21.948522.0210016783.6694833383.677115Alfred 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