IN2016_V02 Southern Ocean bathymetry 10m - 210m Multi-resolution AusSeabed products

Brief description

This layer group describes multibeam echosounder data collected on RV Investigator voyage IN2016_V02, titled "SOTS: Southern Ocean Time Series automated moorings for climate and carbon cycle studies southwest of Tasmania. CAPRICORN: Clouds, Aerosols, Precipitation, Radiation, and Atmospheric Composition over the Southern Ocean. Eddy: Linking eddy physics and biogeochemistry in the Antarctic Circumpolar Current south of Tasmania". The voyage took place between March 14 and April 16, 2016 departing from Hobart (TAS) and arriving in Hobart (TAS).

This voyage had several primary objectives, to (1) deploy a reduced set (SAZ and FluxPulse) and then recover a full set of SOTS moorings (SOFS, Pulse, and SAZ), (2) collect cloud, aerosol, precipitation, radiation and atmospheric composition measurements over the Southern Ocean over 30 days, and to capture the latitudinal variability of these properties from the latitude of Hobart down to 55-60S if time allows and to (3) deploy a suite of floats, two different models per eddy, to obtain profiles of temperature, salinity, velocity, oxygen, nitrate, pH and bio-optics near the eddy centre while we perform spatial surveys.

This dataset is published with the permission of CSIRO. Not to be used for navigational purposes.

The dataset contains bathymetry grids of 10m to 210m resolution of the Southern Ocean, produced from the processed EM122 and EM710 bathymetry data.

Lineage

Data processing for the EM122 and EM710 data was performed using CARIS 8.1.8. Data from both systems were imported into a single CARIS project using Vessel files Investigator_EM710 and Investigator_EM122. A zero tide was applied to the data before merging. All lines were swath edited and then subedited.

The data was then gridded at multiple resolutions in python Caris batch script using a Depth filter Vs Resolution guideline derived from AusSeabed Multibeam guidelines v2 and further inspected for outliers. Final raster products are available in L3 folder of this collection. Final processed data were also exported per line as GSF and ASCII format and available in the L2 folder of this collection.