antarctica

The landice/antarctica test group includes a test case for creating a mesh for Antarctica.

../../../_images/antarctica_8to80km.png

Ice thickness on Antarctica 8-80km variable resolution mesh.

config options

The test group uses the following default config options. At this point only the mesh generation options are adjusted through the config file.

[antarctica]

# number of levels in the mesh
levels = 5

# distance from ice margin to cull (km).
# Set to a value <= 0 if you do not want
# to cull based on distance from margin.
cull_distance = 70.0

# mesh density parameters
# minimum cell spacing (meters)
min_spac = 8.e3
# maximum cell spacing (meters)
max_spac = 8.e4
# log10 of max speed (m/yr) for cell spacing
high_log_speed = 2.5
# log10 of min speed (m/yr) for cell spacing
low_log_speed = 0.75
# distance at which cell spacing = max_spac (meters)
high_dist = 1.e5
# distance within which cell spacing = min_spac (meters)
low_dist = 1.e4

# mesh density functions
use_speed = True
use_dist_to_grounding_line = True
use_dist_to_edge = False

mesh_gen

landice/antarctica/mesh_gen creates a 8-80km variable resolution mesh with the mesh file name Antarctica.nc. In addition, two region masks are generated based on the IMBIE1 (http://imbie.org/imbie-2016/drainage-basins/) and ISMIP6 basins (defined in Jourdain et al. 2020). There is no model integration step.