Citation:

PANGAEA.901885

Name: M84/4 raw data of EM710 multibeam echosounder (bathymetry & beam time series)
Published: 2019-05-21
License: https://creativecommons.org/licenses/by/4.0/
Keywords: Bathymetry; EM710; Galician Shelf; hydroacoustics; Northeast Atlantic; Seismic

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Abstract:

Bathymetry data was acquired during R/V METEOR cruise M84/4 at the Galician Shelf off Northwest Spain in the Northeast Atlantic between 01.05.2011 and 28.05.2011. The main objectives of the cruise were the investigation of sediment transport processes from shallow to deep waters, understanding sediment dynamics, analysis of material downslope processes and the reconstruction of modern and past environmental conditions. The cruise comprised seismic, sedimentological, magnetic, geochemical and palaeoceanographic methods.

Extensive bathymetric mapping during M84/4 based on the multibeam echosounders (MBES) KONGSBERG EM710 and EM122 provided the basis for sediment coring and additional investigations. Hydroacoustic data revealed the diverse morphology in the study area, driven by both sedimentary and tectonic processes, including contouritic deposits, slope gullies, canyon/channel systems, ridges and seamounts. The sub-bottom profiler PARASOUND, multichannel seismics, ADCP, several coring devices and the electromagnetic profiler MARUM-NERIDIS III complemented the research programme of the cruise.

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 M84/4 cruise, the hull-mounted KONGSBERG EM710 multibeam echosounder (MBES) was utilized to perform bathymetric mapping of high resolution in water depths of 3 m to – theoretically – 2000 m. Best quality data is, however, achieved in water depths of less than 600 m, and in rough weather conditions less than 400 m. The EM710 operates at sonar frequencies of 70 to 100 kHz. Three sectors divide the transmit fan, where distinct frequencies or waveforms are transmitted sequentially. The swath width can reach 5.5 times the water depth. 256 beams with an acoustical 1°(TX)/1°(RX) footprint are formed for each ping. The transmit fan is electronically stabilized for roll, pitch and yaw. Combining phase and amplitude bottom detection algorithms allows achieving best possible accuracy. For further information, consult: https://epic.awi.de/id/eprint/26726/1/Kon2007b.pdf. The position and depth of the water column is estimated for each beam by using the detected two-way-travel time and the beam angle known for each beam and taking ray bending due to refraction in the water column by sound speed into account. During the M84/4 cruise, the EM710 was running in a 24-hour watch mode, in addition to the EM122 and the PARASOUND sub-bottom profiling system. Acquisition of EM710 data was reliable during the whole cruise; however, problems occurred during rough weather conditions, since the EM710 lost the bottom signal in depths of more than 400 m.

Responsible person during this cruise / PI: Tilmann Schwenk (tschwenk@marum.de)

Chief Scientist: Till J. J. Hanebuth (thanebuth@coastal.edu)

CR: https://www.tib.eu/de/suchen/id/awi%3Adoi~10.2312%252Fcr_m84_4/

CSR: https://www.ldf.uni-hamburg.de/meteor/wochenberichte/wochenberichte-meteor/m84/m84-4-scr.pdf

Keyword(s):

Bathymetry; EM710; Galician Shelf; hydroacoustics; Northeast Atlantic; Seismic

Related to:

Gaide, Stefanie; Wintersteller, Paul (2020): Gridded bathymetry from EM710 multibeam echosounder of RV METEOR cruise M84/4 (Northeast Atlantic). PANGAEA, https://doi.org/10.1594/PANGAEA.912719

Further details:

Hanebuth, Till J J; Alekseev, Vasily; Andrade Grande, Alba; Baasch, Benjamin; Baumann, Karl-Heinz; Behrens, Philipp; Bender, Vera Barbara; von Dobeneck, Tilo; dos S. Marques, Ana Isabel; Frederichs, Thomas; Haberkorn, Julia; Hangen, Jannes; Hilgenfeldt, Christian; Just, Janna; Kockisch, Brit; Lantzsch, Hendrik; Lenhart, Antje; Lipke, Anna; Lobo Sánchez, Francisco; Mena Rodríguez, Àngel; Müller, Hendrik; Petrovic, Alexander; Rodríguez Germade, Isabel; Roud, Sophie; Schwab, Arne; Schwenk, Tilmann; Voigt, Ines; Wenau, Stefan (2012): Galiomar III - Cruise No. M84/4 - May 01 - May 28, 2011 - Vigo (Spain) - Vigo (Spain). METEOR-Berichte, DFG-Senatskommission für Ozeanographie, M84/4, 58 pp, https://doi.org/10.2312/cr_m84_4

Project(s):

Center for Marine Environmental Sciences (MARUM)

Coverage:

Latitude: 42.234500 * Longitude: -8.740400

Date/Time Start: 2011-05-01T00:00:00 * Date/Time End: 2011-05-28T00:00:00

Event(s):

M84/4-track * Latitude Start: 42.234500 * Longitude Start: -8.740400 * Latitude End: 42.234500 * Longitude End: -8.740400 * Date/Time Start: 2011-05-01T00:00:00 * Date/Time End: 2011-05-28T00:00:00 * Campaign: * Basis: * Method/Device: Underway cruise track measurements (CT) * Comment: Vigo - Vigo

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator
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)

Size:

3192 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
0000_M84-4_EM710_20110501_083246.all	ALL	1072296	0000_M84-4_EM710_20110501_083246.all
0001_M84-4_EM710_20110501_090246.all	ALL	3825079	0001_M84-4_EM710_20110501_090246.all
0002_M84-4_EM710_20110501_093104.all	ALL	3816770	0002_M84-4_EM710_20110501_093104.all
0003_M84-4_EM710_20110501_095915.all	ALL	3829070	0003_M84-4_EM710_20110501_095915.all
0004_M84-4_EM710_20110501_102726.all	ALL	3271815	0004_M84-4_EM710_20110501_102726.all
0005_M84-4_EM710_20110501_105726.all	ALL	1475873	0005_M84-4_EM710_20110501_105726.all
0006_M84-4_EM710_20110501_112726.all	ALL	1212058	0006_M84-4_EM710_20110501_112726.all
0007_M84-4_EM710_20110501_115726.all	ALL	210630	0007_M84-4_EM710_20110501_115726.all
0008_M84-4_EM710_20110501_122727.all	ALL	926423	0008_M84-4_EM710_20110501_122727.all
0009_M84-4_EM710_20110501_125726.all	ALL	166727	0009_M84-4_EM710_20110501_125726.all
0010_M84-4_EM710_20110501_130335.all	ALL	608241	0010_M84-4_EM710_20110501_130335.all
0011_M84-4_EM710_20110501_131833.all	ALL	622036	0011_M84-4_EM710_20110501_131833.all
0012_M84-4_EM710_20110501_133333.all	ALL	623556	0012_M84-4_EM710_20110501_133333.all
0013_M84-4_EM710_20110501_134832.all	ALL	934659	0013_M84-4_EM710_20110501_134832.all
0014_M84-4_EM710_20110501_140333.all	ALL	1709016	0014_M84-4_EM710_20110501_140333.all
0015_M84-4_EM710_20110501_141833.all	ALL	1708133	0015_M84-4_EM710_20110501_141833.all
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0017_M84-4_EM710_20110501_144833.all	ALL	1708501	0017_M84-4_EM710_20110501_144833.all
0018_M84-4_EM710_20110501_150333.all	ALL	1707067	0018_M84-4_EM710_20110501_150333.all
0019_M84-4_EM710_20110501_151833.all	ALL	1706033	0019_M84-4_EM710_20110501_151833.all
0020_M84-4_EM710_20110501_153333.all	ALL	1702089	0020_M84-4_EM710_20110501_153333.all
0021_M84-4_EM710_20110501_154833.all	ALL	1245956	0021_M84-4_EM710_20110501_154833.all
0022_M84-4_EM710_20110501_160333.all	ALL	434092	0022_M84-4_EM710_20110501_160333.all
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0025_M84-4_EM710_20110504_040122.all	ALL	2044594	0025_M84-4_EM710_20110504_040122.all
0026_M84-4_EM710_20110504_041622.all	ALL	1164888	0026_M84-4_EM710_20110504_041622.all
0027_M84-4_EM710_20110504_043122.all	ALL	1141578	0027_M84-4_EM710_20110504_043122.all
0028_M84-4_EM710_20110504_044622.all	ALL	392667	0028_M84-4_EM710_20110504_044622.all
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0030_M84-4_EM710_20110504_051623.all	ALL	115341	0030_M84-4_EM710_20110504_051623.all
0031_M84-4_EM710_20110504_053124.all	ALL	528160	0031_M84-4_EM710_20110504_053124.all
0032_M84-4_EM710_20110504_054623.all	ALL	332900	0032_M84-4_EM710_20110504_054623.all
0033_M84-4_EM710_20110507_205217.all	ALL	54248	0033_M84-4_EM710_20110507_205217.all
0034_M84-4_EM710_20110507_224420.all	ALL	202896	0034_M84-4_EM710_20110507_224420.all
0035_M84-4_EM710_20110507_225917.all	ALL	192000	0035_M84-4_EM710_20110507_225917.all
0036_M84-4_EM710_20110507_231417.all	ALL	183127	0036_M84-4_EM710_20110507_231417.all
0037_M84-4_EM710_20110507_232917.all	ALL	197218	0037_M84-4_EM710_20110507_232917.all
0038_M84-4_EM710_20110507_234417.all	ALL	188366	0038_M84-4_EM710_20110507_234417.all
0039_M84-4_EM710_20110508_012454.all	ALL	198830	0039_M84-4_EM710_20110508_012454.all