Gridded bathymetry from multibeam echosounder EM120 data of the cruise M72/4 (2007)
Bathymetry based on data recorded during M72-4 between 25.04.2007 and 11.05.2007 in the Black Sea. This main objective of this cruise was to gain better knowledge of the pathways of methane from their point of formation via potential intermediate deposits to the seafloor in order to understand the mechanisms leading to the submarine discharge of methane-rich fluids. Two regional Black Sea targets have been chosen: The Sorokin Trough, with focused seepage through mud volcanoes, and the Dniepr area where active gas venting occurs from very shallow water depths down to at least 1000 m.
CI Citation: Paul Wintersteller ( seafloor-imaging@marum.de ): Responsible party for bathymetry post-processing and owner of the end grid.
Simple
- Title
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Gridded bathymetry from multibeam echosounder EM120 data of the cruise M72/4 (2007)
- Alternate title
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M72-4_2007_EM120_Sorokin_Bathymetry
- Date (Creation)
- 2007-05-11T00:00:00
- Date (Revision)
- 2015-04-13T00:00:00
- Citation identifier
- M72-4_2007_EM120_Sorokin_Bathymetry
- Abstract
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Bathymetry based on data recorded during M72-4 between 25.04.2007 and 11.05.2007 in the Black Sea. This main objective of this cruise was to gain better knowledge of the pathways of methane from their point of formation via potential intermediate deposits to the seafloor in order to understand the mechanisms leading to the submarine discharge of methane-rich fluids. Two regional Black Sea targets have been chosen: The Sorokin Trough, with focused seepage through mud volcanoes, and the Dniepr area where active gas venting occurs from very shallow water depths down to at least 1000 m.
CI Citation: Paul Wintersteller ( seafloor-imaging@marum.de ): Responsible party for bathymetry post-processing and owner of the end grid.
- Point of contact
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Organisation name Individual name Electronic mail address Role GEOMAR (Dr. Jörg Bialas)
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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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
- 2007-04-25T00:00:00
- End date
- 2007-05-11T00:00:00
- Geographic identifier
- Black Sea
- Description
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Map projection parameters, values and units :
Axes units :
UPPER LEFT X=31.9605304340
UPPER LEFT Y=44.7878139278
LOWER RIGHT X=35.3740533403
LOWER RIGHT Y=44.2017456970
WEST LONGITUDE=31° 57' 37.9096" E
NORTH LATITUDE=44° 47' 16.1301" N
EAST LONGITUDE=35° 22' 26.5920" E
SOUTH LATITUDE=44° 12' 6.2845" N
PROJ_DESC=Geographic (Latitude/Longitude) / WGS84 / arc degrees
PROJ_DATUM=WGS84
PROJ_UNITS=arc degrees
EPSG_CODE=4326
COVERED AREA=17650 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
- 5421
- Dimension name
- Row
- Dimension size
- 1118
- 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.860255 PANGAEA
- Hierarchy level
- Dataset
Vertical extent
- Minimum value
- 106
- Maximum value
- 2298
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. Due to a negative offset within the data set a positive draft correction of 5 m had to be applied with mbset while further roll, pitch, heave and sound velocity corrections were not applied for the M72-4 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 M72-4 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 .
As the EM120 system was unstable due to some internal system failure it could not be used during some of the M72-4 cruise time. The vessel’s speed was 8 kn during surveys. Responsible person during this cruise / PI: Sarah Althoff (Former employee at the Research Center Ocean Margins).
Metadata
- File identifier
- SDN_CPRD_1568_M72-4_2007_EM120_Sorokin_Bathymetry
- Metadata language
- English
- Character set
- UTF8
- Hierarchy level name
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Composite Product Record
- Date stamp
- 2018-03-15T10:43:20
- 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