Gridded bathymetry from multibeam echosounder EM120 data of the cruise M72/5 (2007)

Bathymetry based on data recorded during M72-5 between 14.05.2007 and 06.06.2007 in the Black Sea. This cruise focused on the biogeochemical and microbiological processes around the oxic/anoxic interface of the chemocline in the water column and in shelf sediments as well as in the TOC-rich sediments of the deep Black Sea basins. A further important goal was to investigate the regional palaeo-climate on the basis of sedimentological analyses of early Holocene and previously deposited interglacial and limnic sediments.

Gridded bathymetry from multibeam echosounder HS-DS2 data of the cruise M51/4 (2001)

Bathymetry based on data recorded during M51-4 between 13.12.2001 and 28.12.2001 in the Black Sea. The purpose of the present-study was to sample sediments and the water columns of the nw/sw Black Sea and the E Marmara Sea to study a) a high resolution sediment records of Holocene climate, b) biogeochemical associated with deep anaerobic methane oxidation, and c) element cycling in the stratified water column. Bathymetric data (hydrosweep + parasound) was primarily used to choose appropriate sites for coring of undisturbed sediments. Samples were taken for future analyses of abundance and activity of bacteria, geochemistry and dating.

Swath sonar bathymetry during POLARSTERN cruise ARK-XXII/1c (PS70) with links to multibeam raw data files

Multibeam data were measured as part of the project HERMES during R/V Polarstern cruise ARK-XXII/1 (2007-05-29 to 2007-07-25) along transits and survey profiles and partly during stationary work. Data were achieved mainly in the coastal areas of northern Norway, at the Hakon Mosby Mud Volcano at the continental margin approx. 200 nm off the norwegian coast and the AWI-Hausgarten area approx. 150 nm west of Svalbard. A number of surveys were carried out in the coastal areas of northern Norway (Sula Reef, Roest Reef, Traena area, Floholmen area, Sotbakken area) and around the area of the Hakon Mosby Mud Volcano. The multibeam sonar system Atlas Hydrosweep DS-2 (Atlas Hydrographic, http://www.atlashydro.com) was operated using 59 beams and 90° aperture angle. The refraction correction was achieved using CTD profiles measured during this cruise or, during transits, utilizing the system's own cross fan calibration. The quality of data might be reduced during bad weather periods or adverse sea ice conditions (only in the AWI-Hausgarten area). This dataset contains raw data that are not processed and thus may contain errors and blunders in depth and position.

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. Gas hydrate environments have been studied in various geological settings, mainly of the eastern Black Sea. Origins, distributions and dynamics of methane and gas hydrates in sediments and also methane fluxes from the sediment to the water column have been the focus. 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.

Gridded bathymetry from multibeam echosounder EM12S data of the cruise TTR6/2 (1996)

Bathymetry based on data recorded during TTR6 between 05.07.1996 and 20.08.1996 in the Black Sea. In the central Black Sea, the aim of TTR-6 the investigation was a bathymetric map of a field of mud volcanoes known from the previous TTR cruises, during transit. In the Sorokin Trough, where gas hydrates were earlier obtained from sea bottom sediments the primary goals concerned the elucidation of the structure of clay diapiric folds and the searching for mud volcanoes and other evidence for fluid flux through the seafloor. The task of looking for the seafloor manifestation of deep fluid emanation was set in the Pallas Uplift area. The EM12s surveying on the Caucasian margin was aimed at the construction of the first detailed bathymetric map of this area.

Swath sonar bathymetry during POLARSTERN cruise ANT-XXVI/3 (PS75) with links to multibeam raw data files

Multibeam data were collected during R/V Polarstern cruise ANT-XXVI/3 along track lines of about 10,400 NM total length along transits, survey profiles and during stationary work. Departing in New Zealand the ship passed Pacific Antarctic Ridge heading to Ross Sea. Main working area was the Amundsen Sea and Bellingshausen Sea. Recorded bathymetry is supplementing existing tracks e.g. of R.V. James Clark Ross and R.V. Nathaniel B. Palmer. The refraction correction was achieved utilizing CTD profiles or by the system's own cross fan calibration. The quality of data might be reduced during bad weather periods or adverse sea ice conditions. The dataset contains raw data that are not processed and thus may contain errors and blunders in depth and position.

Swath sonar bathymetry during POLARSTERN cruise ANT-XXVI/1 (PS75) with links to multibeam raw data files

Multibeam data were collected during R/V Polarstern cruise ANT-XXVI/1. Data recording was executed in northern Atlantic from Bay of Biscay to the Canary Islands for calibration of sonar system Hydrosweep DS2. Data should therefore not be used for high quality grid calculations and charting projects.