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| Data set name | Bathymetric Data (Black Sea, M84-2) |
| Discipline | |
| Parameter groups | |
| Discovery parameter | |
| GEMET-INSPIRE themes | Oceanographic geographical features |
| Abstract | Bathymetry based on data recorded during M84-2 between 26.02.2011 and 02.04.2011 in the Black Sea. The aim of the cruise was to investigate the gas hydrate distribution in sediments of the Black Sea by using several coring technics. In addition to the coring activities the installed EM122 and the PARASOUND system were used to detect gas emissions in the water column and to map large areas of possible seep sites. Responsible party for bathymetry post-processing and owner of the end grid. Detailed description: During the M84-2 cruise the Kongsberg Kongsberg EM710 shallow multi-beam-echo-sounder was used. The EM710 uses a nominal sounding frequency of 70-100 kHz. 256 beams (up to 800 soundings with equidistant and dual swath mode) with a 1°/1° footprint are formed for each ping while the seafloor is detected using amplitude and phase information for each beam sounding. For further information consult http://epic.awi.de/26726/1/Kon2007b.pdf . During M84-2 the EM710 was switched on only at shallower areas, with depths up to max. 1200 m. The swath coverage during bathymetric surveys was kept around 110-130° to avoid loss of data (due to system malfunctions) and data artefacts (like spikes and wobbling. The EM710 was run in dual swath mode. Responsible person during this cruise / PI: Paul Wintersteller (pwintersteller@marum.de). |
| Data format | |
| Data size | 4.680 MB
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| Data set creation date | 20240415 |
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| Map | |
| GML id | mc01 |
| GML objects | | Name | Description |
|---|
| _1 | curve n°1 from multicurve | | _2 | curve n°2 from multicurve | | _3 | curve n°3 from multicurve | | _4 | curve n°4 from multicurve | | _5 | curve n°5 from multicurve | | _6 | curve n°6 from multicurve | | _7 | curve n°7 from multicurve | | _8 | curve n°8 from multicurve |
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| Datum | World Geodetic System 84 / World Mercator |
| Measuring area type | curve |
| Sea regions | |
| Location qualification | Both (Landward + beyond the 12 NM boundary) |
| Ices areas | Black Sea |
| MSFD areas | Black Sea |
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| Start date | 20110304 |
| Start time | 09:00:00 |
| End date | 20110319 |
| End time | 09:00:00 |
| Temporal resolution | 15 |
| Temporal resolution | Days |
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| Instrument/gear category | |
| Device type | |
| Platform type | |
| Cruise name | MeBo DAPC M84-2 |
| Alternative cruise name | M84-2 |
| Cruise start date | 20110226 |
| Cruise Summary Report (CSR) | 84-2 - Meteor(06M3) |
| Station name | Black Sea Survey (Georgia) |
| Alternative station name | - |
| Station start date | 20110319 |
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| Data originator | Center for Marine Environmental Sciences, University of Bremen |
| Data custodian | Center for Marine Environmental Sciences, University of Bremen |
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| Data Distributor | PANGAEA, Data Publisher for Earth & Environmental Science (PANGAEA) |
| Database reference | PANGAEA
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| Access/ordering of data | web data access with registration |
| Access restriction | |
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| Quality info | | Name | Date | Comment |
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| COMMISSION REGULATION (EC) No 1205/2008 of 3 December 2008 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards metadata | 2008-12-04 | See the referenced specification | | COMMISSION REGULATION (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services | 2010-12-08 | See the referenced specification | | QI_Purpose | 2017-08-21 | Bathymetric/morphologic survey | | Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services | 2010-12-08 | See the referenced specification | | QI_Lineage | 2015-07-16 | Description of data processing: Postprocessing and products were conducted by the Seafloor-Imaging group of MARUM, responsible contact 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, 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 difference of less than 20 cm in the Black Sea. Though CTD measurements were taken during the M84-2 cruise, these were not sufficient to represent the changes in sound velocity (SVP) throughout the study area, therefore a 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). Changes in SVP and a slight draft offset correction (-5 m) had be applied (mbset). While further roll, pitch and heave corrections were not necessary for the M84-2 data. The bathymetric data was then 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 archive (Wintersteller, Paul; dos Santos Ferreira, Christian (2016): Gridded bathymetry from multibeam echosounder EM122 data of the cruise M84/2, off Georgia (2011) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.860436). | | QI_Horizontal | 2017-08-21 | smaller than 20m | | Commision Regualtion (EC) No 1205/2008 of 3 December 2008 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards metadata | 2008-12-04 | See the referenced specification | | QI_Vertical | 2017-08-21 | MBES low frequency (smaller than 100kHz) |
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| Lineage | The data centres apply standard data quality control procedures on all data that the centres manage. Ask the data centre for details. |
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| CDI-record id | 3320203 |
| Version | 1 |
| CDI-record initial import date | 2022-01-21 13:19:55.867 |
| CDI-record last update | 2024-06-25 13:18:54.223 |
| Point of contact | Teledyne RESON A/S |