Lohrberg, Arne; Haroon, Amir; Grob, Henrik; Hadré, Emma; Wallmeier, Carolin; Pastoressa, Anna Eliana: Resistivity models inverted from Time-Domain Controlled-Source Electromagnetic (TD-CSEM) data from the southeastern North Sea acquired during expedition AL611 [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.989421 (dataset in review)
Abstract:
Surface-towed time-domain controlled-source electromagnetic (TD-CSEM) data were acquired during expedition AL611 in the southeastern North Sea to map subseafloor electrical resistivity. The survey used a 100 m horizontal electric-dipole transmitter and two inline electric-field receivers towed at ~250 m and ~500 m offsets (SWAN system, Pestoressa et al., 2023). Transients (2 s period, 50% duty) were processed for timing alignment, transient selection and filtering, DC-offset removal, stacking, and logarithmic gating. Two-dimensional resistivity models were obtained with an extended time-domain implementation of MARE2DEM (Haroon et al., 2018; Key, 2016); parameter details are documented in the metadata. The dataset includes processed TD-CSEM inputs and inversion results both as SEGY and XYZ files with embedded positions.
Supplement to:
Lohrberg, Arne (submitted): Subglacial landforms as proxy for offshore freshened groundwater in formerly glaciated margins.
References:
Haroon, Amir; Hölz, Sebastian; Weymer, B; Tezkan, Bülent; Jegen, Marion (2018): Calculating Time-Domain Controlled Source Electromagnetic Signals with MARE2DEM. 3rd Applied Shallow Marine Geophysics Conference, European Association of Geoscientists & Engineers, 2018, 1 - 5, https://doi.org/10.3997/2214-4609.201802663
Key, Kerry (2016): MARE2DEM: a 2-D inversion code for controlled-source electromagnetic and magnetotelluric data. Geophysical Journal International, 207(1), 571-588, https://doi.org/10.1093/gji/ggw290
Pastoressa, Anna Eliana; Haroon, Amir; Everett, Mark E; Rohde, Lea; Bartels, Thies; Wollatz-Vogt, Martin; Faghih, Zahra; Franz, Gesa Katharina; Micallef, Aaron (2023): SWAN: A surface-towed modular controlled-source electromagnetic system for mapping submarine groundwater discharge and offshore groundwater resources. The Leading Edge, 42(9), 590-597, https://doi.org/10.1190/tle42090590.1
Funding:
German Research Foundation (DFG), grant/award no. 524639242: More than buried valleys: Do tunnel valleys serve as conduits for preferential freshened groundwater flow within the North Sea?
Coverage:
Median Latitude: 54.385654 * Median Longitude: 8.129342 * South-bound Latitude: 54.149350 * West-bound Longitude: 7.840950 * North-bound Latitude: 54.564000 * East-bound Longitude: 8.400530
Date/Time Start: 2024-04-25T06:18:29 * Date/Time End: 2024-05-04T14:58:06
Minimum Elevation: -22.0 m * Maximum Elevation: -8.0 m
Event(s):
AL611_2-1 * Latitude Start: 54.215520 * Longitude Start: 8.400530 * Latitude End: 54.561680 * Longitude End: 8.140160 * Date/Time Start: 2024-04-25T06:18:29 * Date/Time End: 2024-04-25T17:32:49 * Elevation Start: -8.0 m * Elevation End: -12.0 m * Campaign: AL611 * Basis: Alkor (1990) * Method/Device: Controlled Source Electro-Magnetics (CSEM)
AL611_6-1 * Latitude Start: 54.149350 * Longitude Start: 8.357210 * Latitude End: 54.564000 * Longitude End: 8.065940 * Date/Time Start: 2024-04-27T04:49:10 * Date/Time End: 2024-04-27T16:43:16 * Elevation Start: -13.0 m * Elevation End: -16.0 m * Campaign: AL611 * Basis: Alkor (1990) * Method/Device: Controlled Source Electro-Magnetics (CSEM)
AL611_8-1 * Latitude Start: 54.211540 * Longitude Start: 8.286250 * Latitude End: 54.542710 * Longitude End: 8.053910 * Date/Time Start: 2024-04-28T06:06:01 * Date/Time End: 2024-04-28T15:00:07 * Elevation Start: -14.0 m * Elevation End: -17.0 m * Campaign: AL611 * Basis: Alkor (1990) * Method/Device: Controlled Source Electro-Magnetics (CSEM)
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Lohrberg, Arne | End | ||
| 2 | Latitude of event | Latitude | Lohrberg, Arne | End | ||
| 3 | Latitude of event 2 | Latitude 2 | Lohrberg, Arne | End | ||
| 4 | Longitude of event | Longitude | Lohrberg, Arne | End | ||
| 5 | Longitude of event 2 | Longitude 2 | Lohrberg, Arne | End | ||
| 6 | Date/Time of event | Date/Time | Lohrberg, Arne | End | ||
| 7 | Date/Time of event 2 | Date/Time 2 | Lohrberg, Arne | End | ||
| 8 | Binary Object | Binary | Lohrberg, Arne | |||
| 9 | Binary Object (Media Type) | Binary (Type) | Lohrberg, Arne | |||
| 10 | Binary Object (File Size) | Binary (Size) | Bytes | Lohrberg, Arne | ||
| 11 | File content | Content | Lohrberg, Arne |
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:
58 data points