Weigelt, Estella; Jokat, Wilfried; Eisermann, Hannes (2020): Arctic Ocean - multichannel seismic reflection profiles recorded during RV POLARSTERN cruise PS87 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.919774
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Abstract:
A set of multichannel seismic reflection lines across the southeastern Lomonosov Ridge and adjacent basins was collected in 2014 during RV Polarstern cruise ARK XXVIII/3 (PS87). The data provide constraints on the coupled evolution of ocean circulations, deposition regime and regional tectonic processes.
The survey set-up for most lines comprised a streamer of 3000 m length (240 channels), and a 24-liter G-gun array. Shots were fired every 15 s resulting into a shot point spacing of 35-40 m. Data were recorded for 12 s at a sample rate of 1 ms. The seismic data processing comprised sorting in a CDP interval of 25 m (= max. fold 145), and velocity analysis (every 100 CDP = 2.5 km). Interval velocities for the seismic units are adopted from the stacking velocities. After the removal of noisy traces and spherical divergence correction the traces were stacked and migrated with a finite-difference time-migration. For a successful suppression of sea floor multiple an f-k filter was applied. In general, the data were filtered with a band pass of 10 - 90 Hz, and an automatic gain control with a gate length of 1000 ms was applied. The dominant frequency of the seismic signals is about 35 Hz, which enables a maximum vertical resolution of about 11-18 m across the sedimentary units. A marked low-frequency reflector with reversed polarity parallels the sea floor at shallow water depths of 190 ms TWT (150 m). The signal turned out to be an arctefact, and in some parts the amplitude strength was succesfully attenuated by a designature filter.
The presented data-set provides migrated seismic reflection seismic lines in segy-format.
Supplement to:
Weigelt, Estella; Jokat, Wilfried; Eisermann, Hannes (2020): Deposition History and Paleo‐Current Activity on the Southeastern Lomonosov Ridge and its Eurasian Flank Based on Seismic Data. Geochemistry, Geophysics, Geosystems, 21(11), https://doi.org/10.1029/2020GC009133
Related to:
Sauermilch, Isabel; Weigelt, Estella; Jokat, Wilfried (2018): Pre-rift sedimentation of the Lomonosov Ridge, Arctic Ocean at 84°N – A correlation to the complex geologic evolution of the conjugated Kara Sea. Journal of Geodynamics, 118, 49-54, https://doi.org/10.1016/j.jog.2018.05.002
Schlager, Ursula; Jokat, Wilfried; Weigelt, Estella; Gebhardt, Catalina (2021): Submarine landslides along the Siberian termination of the Lomonosov Ridge, Arctic Ocean. Geomorphology, 382, 107679, https://doi.org/10.1016/j.geomorph.2021.107679
Schlager, Ursula; Jokat, Wilfried; Weigelt, Estella; Gebhardt, Catalina (2022): Eastern Lomonosov Ridge: Constraints for a variable ice mass thickness during former glaciations. Geomorphology, 413, 108328, https://doi.org/10.1016/j.geomorph.2022.108328
Stein, Ruediger (2015): The Expedition PS87 of the Research Vessel POLARSTERN to the Arctic Ocean in 2014. Berichte zur Polar- und Meeresforschung = Reports on Polar and Marine Research, 688, 273 pp, https://doi.org/10.2312/BzPM_0688_2015
Weigelt, Estella; Geissler, Wolfram H (2023): Seismic reflection profile AWI-20180300, Arctic Ocean. PANGAEA, https://doi.org/10.1594/PANGAEA.963719
Project(s):
Marine Geophysics @ AWI (AWI_GeoPhy)
Coverage:
Median Latitude: 82.350000 * Median Longitude: 145.000000 * South-bound Latitude: 80.500000 * West-bound Longitude: 129.600000 * North-bound Latitude: 84.200000 * East-bound Longitude: 160.400000
Event(s):
PS87_Lomonosov_Ridge * Latitude Start: 84.200000 * Longitude Start: 129.600000 * Latitude End: 80.500000 * Longitude End: 160.400000 * Campaign: PS87 (ARK-XXVIII/4 ALEX2014) * Basis: Polarstern * Method/Device: Seismic reflection profile (SEISREFL)
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | File name | File name | Weigelt, Estella | |||
| 2 | File format | File format | Weigelt, Estella | |||
| 3 | File size | File size | kByte | Weigelt, Estella | ||
| 4 | Uniform resource locator/link to file | URL file | Weigelt, Estella |
License:
Creative Commons Attribution-NonCommercial 4.0 International (CC-BY-NC-4.0)
Size:
60 data points