[{"name":"oden-petermann-2015-bathymetry-2","title":"High-resolution bathymetry from expedition Petermann, Northwest Greenland, 2015","summary":"Multibeam bathymetry from seafloor off northwestern sector of the Greenland Ice Sheet, where Petermann Glacier drains into Nares Strait. The data reveal submarine glacial landforms in fjords, which tell us about the dynamic behaviour of fast-flowing marine-terminating glaciers.\r\n\r\nHigh-resolution bathymetry data are commonly used to study, for example, general seafloor geology, glacial morphology, bottom habitats, and bottom current activities. The data were collected from Swedish icebreaker Oden during the Petermann 2015 expedition.\r\n\r\nThe bathymetry is acquired with a multibeam echo-sounder. The data are provided in the form of a compiled Digital Terrain Model with a grid cell size of 15 m. The processing of the raw data was carried out using the Qimera software by QPS.","citations":"Jakobsson, M., Hogan, K.A., Mayer, L.A., Mix, A., Jennings, A., Stoner, J., Eriksson, B., Jerram, K., Mohammad, R., Pearce, C., Reilly, B., Stranne, C. (2018). The Holocene retreat dynamics and stability of Petermann Glacier in northwest Greenland. Nature Communications, 9(1), 1-11. doi:10.1038\/s41467-018-04573-2\r\n\r\nHogan, K. A., Jakobsson, M., Mayer, L. A., Reilly, B. T., Jennings, A. E., Stoner, J. S., et al. (2020). Glacial sedimentation, fluxes and erosion rates associated with ice retreat in Petermann Fjord and Nares Strait, north-west Greenland. The Cryosphere, 14(1), 261-286. doi:10.5194\/tc-14-261-2020\r\n\r\nJakobsson, M., Mayer, L.A., Bringensparr, C., Castro, C.F., Mohammad, R., Johnson, P., Ketter, T., Accettella, D., Amblas, D., An, L., Arndt, J.E., Canals, M., Casamor, J.L., Chauch\u00e9, N., Coakley, B., Danielson, S., Demarte, M., Dickson, M.-L., Dorschel, B., Dowdeswell, J.A., Dreutter, S., Fremand, A.C., Gallant, D., Hall, J.K., Hehemann, L., Hodnesdal, H., Hong, J., Ivaldi, R., Kane, E., Klaucke, I., Krawczyk, D.W., Kristoffersen, Y., Kuipers, B.R., Millan, R., Masetti, G., Morlighem, M., Noormets, R., Prescott, M.M., Rebesco, M., Rignot, E., Semiletov, I., Tate, A.J., Travaglini, P., Velicogna, I., Weatherall, P., Weinrebe, W., Willis, J.K., Wood, M., Zarayskaya, Y., Zhang, T., Zimmermann, M., Zinglersen, K.B., 2020. The International Bathymetric Chart of the Arctic Ocean Version 4.0. Scientific Data 7, 176. doi:10.1038\/s41597-020-0520-9","comments":"The data were acquired in summer 2015 from Swedish icebreaker (IB) Oden during the Petermann 2015 expedition. A Kongsberg EM122 1\u00b0\u2060\u200a\u00d7\u200a1\u00b0\u2060, 12 kHz, multibeam echo-sounder was hull-mounted in IB Oden. Position, heading and attitude data were received from a Kongsberg-Seatex Seapath 320 navigation unit (GPS and GLONASS) with attached MRU5 motion sensor. The exact speed of sound at the multibeam transducers was provided by a Valeport Mini SVS\/T sound speed and temperature sensor mounted in the sea-chest in Oden\u2019s hull, close to the multibeam transducer arrays. This was interfaced with the multibeam system directly. In addition, sound speed profiles for the entire water column were provided by CTD (Conductivity, Temperature, Depth) stations as well as XBT (Expendable Bathy Thermograph) probes.\r\n\r\n\r\nThe data was collected in a mixture of sea-ice conditions, ranging from 5\/10 to 8\/10 coverage. Navigation was provided by a Seatex Seapath 320 without local augmentation as this is not available in the area. Sound speed correction was done regularly using data from a Seabird 911+ CTD (conductivity, temperature depth) or Valeport SVP (sound velocity profiler).\r\n\r\n\r\nThe Petermann expedition started and ended in Thule Airbase, Greenland, and lasted from July 28 to September 2, 2015. It focused on past variations of the ocean-ice-climate-sea level system to assess how the coupled system has responded to changing climate. Interagency and international collaborations included the US National Science Foundation (NSF), The Ocean Melting Greenland (OMG) project of US National Aeronautics and Space Administration (NASA), the British Antarctic Survey, University NAVSTAR Consortium (UNAVCO), the Polar Geospatial Center (PGC), the Swedish Polar Research Secretariat, and the Geological Survey of Denmark and Greenland. ","category":"Marine","subcategory":"Bathymetry","keywords":"Bathymetry; Arctic Ocean; Multibeam; Icebreaker Oden","scientist":"Martin Jakobsson, Larry Mayer, Kelly Hogan, Bj\u00f6rn Eriksson, Kevin Jerram, Christian Stranne","firstname":"Martin","lastname":"Jakobsson","address":"Department of Geological Sciences; Stockholm University","postalcode":"SE-106 91","city":"Stockholm","province":"","country":"Sweden","parameters":"Earth science > Oceans > Bathymetry\/seafloor topography > Bathymetry","location":"Ocean > Arctic Ocean","progress":"Completed","language":"English","project":"Petermann 2015 expedition","publisher":"Bolin Centre Database","version":"2","constrains":"","access":""}]