PANGAEA_996933 GEM-2 total ice thickness estimates of the ice floe transect during station PS149_25-1 during the PS149 CONTRASTS expedition (July-August 2025) Ringel, Maximilian Harald; Spreen, Gunnar; Krumpen, Thomas; Neudert, Mara GEM-2 total ice thickness estimates of the ice floe transect during station PS149_25-1 during the PS149 CONTRASTS expedition (July-August 2025) 2026-09-02 PANGAEA Dataset https://doi.pangaea.de/10.1594/PANGAEA.996933 Investigator Maximilian Harald Ringel mringel@uni-bremen.de Earth Science DATE/TIME LATITUDE LONGITUDE Sea ice and snow thickness geoscientificInformation Arctic Broadband electromagnetic sensor CONTRASTS expedition electromagnetic induction File 088 GEM-2 Geophex magnaprobe melt pond depth ocean PS149 PS149_25-1-gem2-730-iup-01 RV Polarstern Sea ice Sea ice thickness snow depth Ground-based Electromagnetic Induction Sounding Device, GEM-2, Geophex Ltd Polarstern 2025-08-01 2025-08-01 Complete 83.7300568 83.738121 18.8822422 18.9907513 AC3 Arctic Amplification unrestricted CC-BY-4.0: Creative Commons Attribution 4.0 International English PANGAEA Data Publisher for Earth & Environmental Science https://www.pangaea.de/ Data Center Contact Michael Diepenbroek info@pangaea.de

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Bremen Bremen 28359 Germany online 157054 data points text/tab-separated-values 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

This 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. ** For all details see the full metadata description at "https://doi.pangaea.de/10.1594/PANGAEA.996933"!

http://en.wikipedia.org/wiki/ISO_6709 LATITUDE http://en.wikipedia.org/wiki/ISO_6709 LONGITUDE http://en.wikipedia.org/wiki/ISO_8601 DATE/TIME https://doi.org/10.17815/jlsrf-3-163 Polarstern https://doi.org/10.57738/BZPM_0808_2026 The Expedition PS149 of the Research Vessel POLARSTERN to the Arctic Ocean in 2025 https://gepris.dfg.de/project/268020496 AC3 PANGAEA_996907 DIF 9.4 2026-09-02 2026-09-02