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