------- purpose ------- This demonstration case allows for examining the sea ice rheology under idealised forcing. The set-up follows the paper "Stress and deformation characteristics of sea ice in a high-resolution, anisotropic sea ice model" by Heorton et al, Phil. Trans, R. Soc. 2018. ----------- Experiments ----------- A range of experiments can be configured: - The suggested experiment is to examine the different shear patterns formed by different rheologies. The default set-up reproduces the leftmost panels of figure 3a (ln_rhg_EAP true in namelist_ice_cfg) and 3b (ln_rhg_EVP true in namelist_ice_cfg). Increase the last time step in namelist_cfg appropriately to generate the other panels. - The resolution of the box can be changed analogous to figure 2 of the paper (change rn_dx and rn_dy in namelist_cfg, default is 2000m) - The ratio of the windstress component can be changed to cause different modes of failure (Rwind in usrdef_sbc.F90, default is -0.8) It takes about 10 minutes to run a simulation on 16 processors ---------- How to run ---------- a) Compile and run the model once to get mesh_mask_xxxx.nc files. E.g., starting in the root NEMO directory: ./makenemo -a ICE_RHEO -r ICE_RHEO_TEST -m X64_MOBILIS -j 4 cd tests/ICE_RHEO_TEST/EXP00 mpirun -np 1 ./nemo c) Create the initial condition file for sea-ice (initice.nc) by running this python script: python ../../ICE_RHEO/EXPREF/make_INITICE.py d) Run the model a second time mpirun -np 16 ./nemo --------------- What to look at --------------- EVP rheology has less defined shear strain maxima (linear kinematic features). If the model is run longer one can see that the LKFs appearing with EVP rheology intersect at a different angle than with EAP rheology