High-resolution bathymetry from expedition Petermann, Northwest Greenland, 2015

Martin Jakobsson, Alan Mix

Multibeam bathymetry from Petermann Fjord and adjacent Hall Basin, Northwest Greenland, collected with Swedish icebreaker Oden. The multibeam mapping was carried out during the Petermann 2015 Expedition with Oden, 29 July to 2 September, which started and ended in Thule Airbase. The multibeam echosounder is a Kongsberg EM122, 12 kHz (1x1°). The bathymetric data are provided as a processed grid with a cell-size resolution of 15x15 m on a polar stereographic projection, true scale 75° N. The horizontal datum is WGS84 and vertical datum is Mean Sea Level.

Citation

Martin Jakobsson, Alan Mix (2019) High-resolution bathymetry from expedition Petermann, Northwest Greenland, 2015. Dataset version 1. Bolin Centre Database. https://doi.org/10.17043/oden-petermann-2015-bathymetry-1

References

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. https://doi.org/10.1038/s41467-018-04573-2

Data description

The data was collected in a mixture of sea-ice conditions, ranging from 5/10 to 8/10 coverage. The multibeam echosounder installed in Oden is a Kongsberg EM122, 12 kHz (1x1°). 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). The bathymetric data are provided as a processed grid with a cell-size resolution of 15x15 m on a polar stereographic projection, true scale 75° N. The horizontal datum is WGS84 and vertical datum is Mean Sea Level. The multibeam data are available in various formats: Fledermaus SD object files, ArcView ASCII files and netCDF files.

Comments

The Petermann 2015 expedition 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 NSF, NASA, the British Antarctic Survey, UNAVCO, the Polar Geospatial Center (PGC), the Swedish Polar Research Secretarial, and the Geological Survey of Denmark and Greenland.