Gridded EM710 multibeam-echosounder bathymetry of cruise HE449

• Main Authors: Brückner, Nils, Gaide, Stefanie, Wintersteller, Paul
• Format: Dataset
• Language: English
• Published: PANGAEA 2018
• Subjects: Center for Marine Environmental Sciences; CT; File format; File name; File size; HE449; HE449-track; Heincke; MARUM; Underway cruise track measurements; Uniform resource locator/link to file; Svalbard; Barents Sea; Norwegian Sea; Nils; Kongsberg
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.893201; https://doi.org/10.1594/PANGAEA.893201

Bathymetry based on data recorded during RV HEINCKE HE449 between 01.08.2015 and 22.08.2015 in the Norwegian Sea. The aim of the cruise was to explore gas emissions using the echosounders of the ship along the slope of the Barents Sea up to Svalbard to find more evidence for dynamic changes of gas hydrates and emissions of free gas. CI Citation: Paul Wintersteller ([e-mail]) as responsible party for bathymetry post-processing and its products. Description of processed data sources: During the RV HEINCKE cruise HE449 the Kongsberg EM710 shallow multibeam echosounder with a nominal sounding frequency of 70-100 kHz was utilized. 256 beams (and up to 800 soundings with 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: http://epic.awi.de/26726/1/Kon2007b.pdf. During the surveys the EM710 system crashed two times but the resulting gaps in the data were negligent, the system was otherwise stable during the cruise. The C-Keel sound velocity sensor worked flawlessly until mid-cruise and then stopped working for a several days. In fact, it had several issues delivering data during the cruise. The wobbling problem described on cruise HE387 (Sahling, 2012) is still present over the EM710 data. Responsible person during this cruise / PI: Nils Brückner ([e-mail]), Stefanie Gaide ([e-mail]) & Miriam Römer ([e-mail]). Description of data processing: Postprocessing and products were conducted by the Seafloor-Imaging & Mapping group of MARUM/FB5, responsible person: Paul Wintersteller ([e-mail]). The open source software MB-System suite (Caress, D.W., and D.N. Chayes, MB-System Version 5.5, 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 ...