Wintersteller, Paul (2018): Gridded EM300 multibeam-echosounder bathymetry of cruise 64PE284 [dataset]. MARUM - Center for Marine Environmental Sciences, University Bremen, PANGAEA, https://doi.org/10.1594/PANGAEA.893204
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Published: 2018-08-23 • DOI registered: 2019-04-19
Abstract:
Bathymetry based on multibeam echosounder (MBES) data recorded during RV PELAGIA cruise 64PE284 between 18.02.2008 and 09.03.2008 at the Moroccan continental margins. The main objective of this cruise was the investigation of cold-water coral ecosystems in the Gulf of Cádiz. The study of these partly quite small-scale systems requires besides standard sampling methods also innovative technology, therefore the ROV CHEROKEE was used for observations.
Description of the data source:
During the RV PELAGIA cruise 64PE284 the Kongsberg EM300 multibeam echosounder with a nominal sounding frequency of 30 kHz was utilized. 135 beams are formed for each ping with with a 1°(Tx)/2°(Rx) footprint while the seafloor is detected using amplitude and phase information for each beam sounding. For further information consult https://www.whoi.edu/cms/files/instruments/2006/9/160765ad_EM300_Product_specific_lr_13565.pdf. The EM300 was recording constantly within the permitted areas designated to bathymetry surveys. The EM300 system performed as expected during the cruise. Responsible person during this cruise / PI: Ruud Groenewegen (ruud.Groenewegen@nioz.nl).
Description of data processing:
Postprocessing and products were conducted by the Seafloor-Imaging & Mapping group of MARUM/FB5, responsible person: Paul Wintersteller (seafloor-imaging@marum.de). The open source software MB-System suite (Caress, D.W., and D.N. Chayes, MB-System Version 5.5, open source software distributed from the MBARI and L-DEO web sites, 2000-2012.) was utilized for this purpose. CTD measurements during the 64PE284 cruise were sufficient to represent the changes in the sound velocity throughout the study area. Further roll, pitch and heave or leverarms corrections were not necessary for the 64PE284 data. Bathymetric data has been manually cleaned for existing artefacts with mbeditviz. NetCDF (GMT) grids of the product and the statistics were created using mbgrid. No total propagated uncertainty (TPU) has been calculated to gather vertical or horizontal accuracy. The currently published bathymetric grid of the cruise has a resolution of 125 m. A higher resolution is, at least partly, achievable. The grid extended with _num represents a raster dataset with the statistical number of beams/depths taken into account to create the depth of the cell. The extended _sd -grid contains the standard deviation for each cell. All grids produced are retrievable through the PANGAEA database (www.pangaea.de).
Chief Scientist: D. Hebbeln (dhebbeln@marum.de)
CSR: not yet available
Further details:
El Frihmat, Yassine; Hebbeln, Dierk; EL Bachir, Jaaidi; MHammdi, N (2014): Late Quaternary history of the Mediterranean outflow to the southern part of the Gulf of Cadiz, evidence from benthic foraminiferal carbon isotope Histoire de l'écoulement méditerranéen vers le Sud du Golfe de Cadix au Quaternaire terminal, argument à partir des isotopes du carbone des foraminifères benthiques. Bulletin de l'Institut Scientifique, Section Sciences de la Terre, 36
Hebbeln, Dierk (2018): 64PE284 raw data of EM300 multibeam echosounder (bathymetry, beam time series) [dataset]. MARUM - Center for Marine Environmental Sciences, University Bremen, PANGAEA, https://doi.org/10.1594/PANGAEA.893090
Hebbeln, Dierk; Wienberg, Claudia; Beuck, Lydia; Boom, Lorendz; Cunha, Marina Ribeiro; Dimmler, Werner; Eisele, Markus Hermann; El Frihmat, Yassine; Fink, Hiske G; Groenewegen, Ruud; Löffler, Sonja-B; López, Nieves; Meyer-Schack, Birgit; Nowald, Nicolas (2008): Report and preliminary results of RV Pelagia Cruise 64PE284. Cold-water Corals in the Gulf of Cádiz and on Coral Patch Seamount (NE Atlantic). Portimão - Portimão, 18.02. - 09.03.2008. Berichte aus dem Fachbereich Geowissenschaften der Universität Bremen, 265, 90 pp, urn:nbn:de:gbv:46-ep000103738
Project(s):
Coverage:
Median Latitude: 36.045000 * Median Longitude: 1.637500 * South-bound Latitude: 34.970000 * West-bound Longitude: -8.529000 * North-bound Latitude: 37.120000 * East-bound Longitude: 11.804000
Date/Time Start: 2008-02-18T00:00:00 * Date/Time End: 2008-03-09T00:00:00
Event(s):
64PE284-track * Latitude Start: 37.120000 * Longitude Start: -8.529000 * Latitude End: 34.970000 * Longitude End: 11.804000 * Date/Time Start: 2008-02-18T00:00:00 * Date/Time End: 2008-03-09T00:00:00 * Campaign: 64PE284 (58735) * Basis: Pelagia * Method/Device: Underway cruise track measurements (CT)
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | File name | File name | Wintersteller, Paul | |||
| 2 | File format | File format | Wintersteller, Paul | |||
| 3 | File size | File size | kByte | Wintersteller, Paul | ||
| 4 | Uniform resource locator/link to file | URL file | Wintersteller, Paul |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Basic curation (CurationLevelB) * Processing Level: PANGAEA data processing level 3 (ProcLevel3)
Size:
12 data points