Gridded bathymetry from multibeam echosounder EM120 data of the cruise M72/3a and M72/3b (2007)
Bathymetry based on data recorded during M72-3 between 17.03.2007 and 23.04.2007 in the Black Sea. This cruise concentrated on interdisciplinary work on gas hydrates with a main focus on the gas hydrate transition zone in and below 750 m water depth. Main working areas were the Sorokin Trough, an area south of the Kerch Strait and the Andrusov Ridge in Ukrainian waters and the Gudauta Ridge and Gurian Trough in Georgian waters.
CI Citation: Paul Wintersteller ( seafloor-imaging@marum.de ): Responsible party for bathymetry post-processing and author of the product.
Simple
- Title
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Gridded bathymetry from multibeam echosounder EM120 data of the cruise M72/3a and M72/3b (2007)
- Alternate title
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M72-3_2007_EM120_Bathymetry
- Date (Creation)
- 2007-04-23T00:00:00
- Date (Revision)
- 2015-04-13T00:00:00
- Citation identifier
- M72-3_2007_EM120_Bathymetry
- Abstract
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Bathymetry based on data recorded during M72-3 between 17.03.2007 and 23.04.2007 in the Black Sea. This cruise concentrated on interdisciplinary work on gas hydrates with a main focus on the gas hydrate transition zone in and below 750 m water depth. Main working areas were the Sorokin Trough, an area south of the Kerch Strait and the Andrusov Ridge in Ukrainian waters and the Gudauta Ridge and Gurian Trough in Georgian waters.
CI Citation: Paul Wintersteller ( seafloor-imaging@marum.de ): Responsible party for bathymetry post-processing and author of the product.
- Point of contact
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Organisation name Individual name Electronic mail address Role MARUM (Prof. Gerhard Bohrmann)
Product manager MARUM
Production center
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Project name
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EMODNet Bathymetry
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Measuring devices
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multi-beam echosounders
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multi-beam echosounders
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Measuring devices
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Differential Global Positioning System receivers
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Parameter Discovery Vocabulary (P02)
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Bathymetry and Elevation
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GEMET - INSPIRE themes, version 1.0
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Hydrography
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- Access constraints
- License
- Use constraints
- Copyright
- Other legal constraints
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Artemov, Yuriy G; Brüning, Markus; Nikolovska, Aneta; Althoff, Sarah; Klaucke, Ingo (2013): Swath sonar multibeam EM-120 bathymetry during METEOR cruise M72/3 with links to raw data files. MARUM - Center for Marine Environmental Sciences, Universität Bremen, doi:10.1594/PANGAEA.816229
- Other legal constraints
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Seifert, Richard; Boetius, Antje; Bohrmann, Gerhard; Bialas, Jörg; Borowski, Christian (2011): Biogeochemistry, Microbiology, Marine Fluids, Gas Hydrates and Regional Palaeo-Climate of the Black Sea - Cruise No. 72, February 7 - June 4, 2007, Istanbul (Turkey) - Trabzon - Istanbul (Turkey). METEOR-Berichte, Leitstelle Meteor, Institut für Meereskunde der Universität Hamburg, 12-1, 240 pp, doi:10.2312/cr_m72 *
https://www.tib.eu/de/suchen/id/awi%3Adoi~10.2312%252Fcr_m72/
- Spatial representation type
- Grid
- Denominator
- 300000
- Distance
- 125 Metres (m)
- Language
- English
- Character set
- UTF8
- Topic category
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- Oceans
- Begin date
- 2007-03-17T00:00:00
- End date
- 2007-04-23T00:00:00
- Geographic identifier
- Black Sea
- Description
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Map projection parameters, values and units :
Axes units :
UPPER LEFT X=33.9720687250
UPPER LEFT Y=44.8162476703
LOWER RIGHT X=41.5217973783
LOWER RIGHT Y=41.6298447870
WEST LONGITUDE=33° 58' 19.4474" E
NORTH LATITUDE=44° 48' 58.4916" N
EAST LONGITUDE=41° 31' 18.4706" E
SOUTH LATITUDE=41° 37' 47.4412" N
PROJ_DESC=Geographic (Latitude/Longitude) / WGS84 / arc degrees
PROJ_DATUM=WGS84
PROJ_UNITS=arc degrees
EPSG_CODE=4326
COVERED AREA=216835 sq km
- Geographic identifier
- EPSG / WGS84 / Geographic coordinate system / 7.4
- Reference system identifier
- EPSG / WGS 84 (EPSG:4326) / 7.4
- Number of dimensions
- 3
- Dimension name
- Column
- Dimension size
- 11983
- Dimension name
- Row
- Dimension size
- 5059
- Dimension name
- Time
- Dimension size
- 1
- Cell geometry
- Point
- Transformation parameter availability
- Checkpoint Availability
- Point in Pixel
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- Center
- Distribution format
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Name Version ESRI ASCII, NetCDF GMT, ASCII XYZ
Not stated
- Distributor contact
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Organisation name Individual name Electronic mail address Role PANGAEA
Dissemination Unit
- OnLine resource
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Protocol Linkage Name WWW:LINK
https://doi.pangaea.de/10.1594/PANGAEA.860094 PANGAEA
- Hierarchy level
- Dataset
Vertical extent
- Minimum value
- 61
- Maximum value
- 3049
Vertical CRS
Vertical CS
Vertical datum
- Statement
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no information
- Hierarchy level
- Feature
- Dataset
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accuracy
Gridded data positional accuracy
- Name of measure
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horizontal accuracy
- Measure identification
- horizontal accuracy of coordinate
Quantitative result
- Value type
- horizontal accuracy
Quantitative attribute accuracy
- Name of measure
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depth
- Measure identification
- depth accuracy
Quantitative result
- Value
- not defined
Conformance result
- Title
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Shoal bias
- Date
- Pass
- Hierarchy level
- Software
- Description
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MB-System
- Other
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software
- Hierarchy level
- Property type
- Description
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parameters of data processing
Attributes
- Statement
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Description of data processing :
Postprocessing and products were conducted by the Seafloor-Imaging group of MARUM, responsible person: Paul Wintersteller ( seafloor-imaging@marum.de ). The open source software MB-system (Caress, D.W., and D.N. Chayes, MB-System Version 5, Open source software distributed from the MBARI and L-DEO web sites, 2000-2012.) was utilized for this purpose. A tide correction was applied, based on the Oregon State University (OSU) tidal prediction software (OTPS) that is retrievable through MB-System. In general, there is a tide differences of less than 20 cm in the Black Sea. Though CTD measurements were taken during the M72-3 cruise, these were not sufficient to represent the changes in the SVP profile throughout the study area, therefore a SVP correction had to be applied. The corrections of sound velocity is based on various SVP/CTD measurements throughout different cruises in the Black Sea within the last 15-20 years. In addition, the NATO Black Sea data base ( http://sfp1.ims.metu.edu.tr/ODBMSDB/ODBMSDB.dll/querydb) was consulted for further CTD profiles in the given season/period of the year and in close position to the data set. The CTD data has then been used to calculate SVP by the usage of the UNESCO formula (G.S.K. Wong and S Zhu, Speed of sound in seawater as a function of salinity, temperature and pressure (1995) J. Acoust. Soc. Am. 97(3) pp 1732-1736). The changes in SVP were applied with the mbset function within mbsystem. Due to a negative offset within the data set a positive draft correction of 10 m had to be applied with mbset while further roll, pitch, and heave corrections were not necessary for the M72-3 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. Quality assurance was furthermore proven by visual and statistical comparison of crossing survey-lines from different cruises throughout the Black Sea. 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.
- Description
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Description of processed data sources :
During the cruise M72-3 the Kongsberg EM120 multi-beam echo-sounder was used. The EM120 uses a nominal sounding frequency of 12 kHz. 191 beams with a 1°/2° footprint are formed for each ping while the seafloor is detected using amplitude and phase information for each beam sounding. For further information consult https://epic.awi.de/26725/1/Kon2007a.pdf .
The EM120 multi-beam was used continuously during M72-3. The vessel’s speed was 8 kn during
Surveys while the opening-angle was set to 140°. On transits with speeds up to 12 kn the EM120 was running with bad data quality especially for the outer beams. Responsible person during this cruise / PI: Markus Brüning ( info@pk-engineers.de ).
Metadata
- File identifier
- SDN_CPRD_1568_M72-3_2007_EM120_Bathymetry
- Metadata language
- English
- Character set
- UTF8
- Hierarchy level name
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Composite Product Record
- Date stamp
- 2018-01-18T13:19:02
- Metadata standard name
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ISO 19115:2003/19139 - EMODNET - BATHYMETRY
- Metadata standard version
-
1.0
- Metadata author
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Organisation name Individual name Electronic mail address Role MARUM
Author