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Bohrmann, Gerhard; Spieß, Volkhard; Keil, Hanno; Brüning, Markus; Mortera-Gutierrez, Carlos; Pacheco Munoz, Jorge; Pelaez, Juan Ramòn (2019): M67-2 raw data of EM710 multibeam echosounder (bathymetry & beam time series) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.902765

Always quote citation above when using data! You can download the citation in several formats below.

Published: 2019-06-19 • DOI registered: 2020-08-01

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Abstract:
Between 14.03.2006 and 25.04.2006, bathymetric data based on the KONGSBERG EM710 system (MBES) was acquired in the Gulf of Mexico during the R/V METEOR cruise M67/2. The main research goal was the investigation of asphalt volcanoes in the Campeche Bay and related sedimentary structures. The leg was split into two parts. During the first sub-leg 2a geophysical and especially hydroacoustic methods were used to explore the distribution of these asphalt volcanoes and to map knolls as well as other structures like mass wasting and asphalt flows. Using reflection seismic, sedimentary structures related to the volcanoes were also investigated. Further mapping but also sampling of vent fluids and asphalt was the research interest of sub-leg 2b. Therefore the Remotely Operating Vehicle (ROV) QUEST (Marum) as well as a TV-MUC were used. Bathymetry mapping was done using the EM120 for deeper and the EM710 for shallower regions.
CI Citation: Paul Wintersteller (seafloor-imaging@marum.de) as responsible party for bathymetry raw data ingest and approval.
Description of the data source:
During the M67/2 cruise, the hull-mounted multibeam echosounder (MBES) KONGSBERG EM710 was utilized to perform bathymetric mapping in shallower areas. It allows to conduct surveys in water depths of up to 2,000 m, however it operates best in shallower water depths under 500 m. Two transducer arrays transmit frequency coded acoustic signals (70 to 100 kHz). Data acquisition is based on continuous wave pulses in shallower depths and FM (chirp) pulses in greater depths. The beam footprint has a dimension of 1° by 1°. For further information on the system, consult: https://www.km.kongsberg.com/
Due to the water depth of the research area the EM120 was permanently used, while the EM710 was only used in few parts of the research area.
To convert the recorded travel times into water depth, several sound velocity profiles were obtained with the shipboard CTD, providing a correction for ray bending for each beam. Depth is estimated from each beam by using the two-way travel time and the known beam angle known, and taking into account the ray bending due to refraction in the water column by sound speed variations.
Responsible person during this cruise / PI: Volkhard Spieß (vspiess uni-bremen.de), Gerhard Bohrmann (gbohrmann@marum.de)
Chief Scientist: : Volkhard Spieß (vspiess uni-bremen.de), Gerhard Bohrmann (gbohrmann@marum.de)
CR: https://www.tib.eu/de/suchen/id/awi%3Adoi~10.2312%252Fcr_m67/
CSR: https://www2.bsh.de/aktdat/dod/fahrtergebnis/2006/20060077.htm
Keyword(s):
asphalt volcanoes; Bathymetry; EM710; Gulf of Mexico; hydroacoustics
Further details:
Weinrebe, Reimer Wilhelm; Bohrmann, Gerhard; Spieß, Volkhard (2010): Fluid Seepage of Chile and in the Southern Gulf of Mexico - Cruise No. M67 - February 20 - April 25, 2006 - Talcahuano (Chile) - Bridgetown (Barbados). METEOR-Berichte, DFG-Senatskommission für Ozeanographie, M67, 110 pp, https://doi.org/10.2312/cr_m67
Project(s):
Center for Marine Environmental Sciences (MARUM)
Coverage:
Median Latitude: 11.242400 * Median Longitude: -69.773350 * South-bound Latitude: 9.381200 * West-bound Longitude: -79.915600 * North-bound Latitude: 13.103600 * East-bound Longitude: -59.631100
Date/Time Start: 2006-03-14T00:00:00 * Date/Time End: 2006-03-31T00:00:00
Event(s):
M67/2a-track * Latitude Start: 9.381200 * Longitude Start: -79.915600 * Latitude End: 13.103600 * Longitude End: -59.631100 * Date/Time Start: 2006-03-14T00:00:00 * Date/Time End: 2006-03-31T00:00:00 * Campaign: M67/2a * Basis: Meteor (1986) * Method/Device: Underway cruise track measurements (CT) * Comment: Cristobal - Bridgetown
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1 File nameFile nameWintersteller, Paul
2 File formatFile formatWintersteller, Paul
3 File sizeFile sizekByteWintersteller, Paul
4 Uniform resource locator/link to fileURL fileWintersteller, Paul
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Basic curation (CurationLevelB) * Processing Level: PANGAEA data processing level 1 (ProcLevel1)
Size:
484 data points

Data

Download dataset as tab-delimited text — use the following character encoding:

1 
File name		2 
File format		3 
File size [kByte]		4 
URL file
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