The Arctic bathymetry predicted from DTU17 gravity anomalies.
Basic information on these two grids can be accesed using GMT module "grdinfo".


Arc_BATH_FULL.nc :
Netcdf format, Cartesian coordinate system. Polar Stereographic projection is used, 
which is the same as the International Bathymetric Chart of the Arctic Ocean (IBCAO). 
The grid spacing is 500 m in both x and y axis directions. Basic projection parameters are as 
follows:
    PROJECTION["Polar_Stereographic"],
    PARAMETER["latitude_of_origin",90],
    PARAMETER["central_meridian",0],
    PARAMETER["scale_factor",1],
    PARAMETER["false_easting",0],
    PARAMETER["false_northing",0],

Arc_BATH_FULL_geo.nc :
1 arcminute geographic grid, Netcdf format, achieved using GMT, with the following command:
grdproject Arc_BATH_FULL.nc -GArc_BATH_FULL_geo.nc -Js0/+90/+75/1:1 -R0/360/60/90  -C0/0 -F -I -D1m -V