landice/calving_dt_convergence/dt_convergence_test runs short
integrations repeatedly with different values for the fraction of the
calving CFL limit applied in the adpative timestepper. Time series of the
total calving flux and the calving CFL to actual timestep ratio are then
plotted, as well as summary of the number of calving warnings for each choice
of calving CFL fraction (see below).
The individual tests are named for the mesh, the calving law, and the
velocity solver setting, separated by periods.