METEOR cruise M112 raw data of EM122 multibeam echosounder (bathymetry, beam time series & water column) including SVPs

Hydroacoustic raw data recorded during M112 between 06.11.2014 and 15.12.2014 in the eastern Mediterranean Sea. The aim of the cruise was to investigate in mud volcanoes of the Calabrian Arc in Italian waters, where 54 potential mud volcanoes have been documented while it remained unclear whether they are still active or not. Therefore, the bathymetric surveys were accompanied with investigations in the water column. Several sound velocity profiles (SVPs) were taken to correct the bathymetry. CI Citation: Paul Wintersteller (seafloor-imaging@marum.de) as responsible party for bathymetry post-processing and its products. Description of the data source: During the cruise M112 the Kongsberg EM122 multibeam echosounder with a nominal sounding frequency of 12 kHz was utilized. 288 beams (and up to 864 soundings in equidistant and dual swath mode) are formed for each ping with a 1°(Tx)/2°(Rx) footprint while the seafloor is detected using amplitude and phase information for each beam sounding. For further information consult https://www.km.kongsberg.com/. The EM122 was recording constantly within the permitted areas, either designated to bathymetry surveys or flare imaging-surveys. Responsible person during this cruise / PI: Paul Wintersteller (pwintersteller@marum.de) and Christian Ferreira (cferreira@marum.de).

Chief Scientist: G. Bohrmann gbohrmann@marum.de CSR: http://www.bsh.de/aktdat/dod/fahrtergebnis/2014/20140278.htm

A special thanks goes to the watch keeper during M112: M. Wiebe, D. Praeg, C. Johansen,O. Candoni, T. Biller, W. Menapace