[issm-support] ISSM Questions

[Gordan Stuhne]

Hello,

I am quite interested in your model, and have been working with it
using some of my own grids and data relating to Greenland.
My SIA (Hutter) results basically look rational for 100yr prognostic
runs (using thermal penalty_lock=10 for stability), but I have a few
questions.  Firstly, the basal melting rates reported in the
output files are very high (on the order of m/yr).  This is
presumably computed from latent heat fluxes where the
basal ice becomes temperate, but the details don't seem
to be documented in the code and I am not sure if I am
interpreting it right.

Secondly, I am having trouble trying to run the same case in
FS mode.  I've tried adjusting time-step, viscosity overshoot,
and other parameters with no success.  Is there some
useful rule of thumb for preparing the initial conditions?

Your insight would be greatly appreciated,
Thanks in advance,
Gordan Stuhne,
Dept. of Physics,
University of Toronto