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coupled to a dynamic thermodynamic sea-ice model. |
coupled to a dynamic thermodynamic sea-ice model. |
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A brief description of the sea-ice model is in "seaice.ps". |
A brief description of the sea-ice model is in "seaice.ps". |
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This experiment is a 1-cpu, 10-hour integration used to test |
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CPP option SEAICE_EXTERNAL_FORCING. Atmospheric state is read-in |
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using pkg/exf, rather than pkg/seaice routines. This experiment |
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uses pkg/gmredi, pkg/kpp, pkg/seaice, and pkg/exf. |
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The domain of integration spans 280E to 320E and 46N to 78N. |
The domain of integration spans 280E to 320E and 46N to 78N. |
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Horizontal grid spacing is 2 degrees. |
Horizontal grid spacing is 2 degrees. |
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The 23 vertical levels and the bathymetry file |
The 23 vertical levels and the bathymetry file |
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lwdownFile = 'flo.labsea1979' # downward longwave radiation |
lwdownFile = 'flo.labsea1979' # downward longwave radiation |
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swdownFile = 'fsh.labsea1979' # downward shortwave radiation |
swdownFile = 'fsh.labsea1979' # downward shortwave radiation |
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precipFile = 'prate.labsea1979' # precipitation |
precipFile = 'prate.labsea1979' # precipitation |
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evapFile = 'evap.labsea1979' # evaporation |
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The experiment uses pkg/gmredi, pkg/kpp, pkg/seaice, and pkg/exf. |
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The test is a 1-cpu, 10-hour integration. Both the atmospheric |
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state and the open-water surface fluxes are provided by pkg/exf. |
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More pkg/seaice test experiments, configured for low and |
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high-resolution global cube-sphere domains are described |
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in MITgcm_contrib/high_res_cube/README_ice. |
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Using testscript to test sea-ice code |
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===================================== |
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Running the testscript experiment: |
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cd MITgcm/verification |
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./testreport -t lab_sea |
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Note that fairly large differences in accuracy occur across different |
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platforms. For example, testscript comparisons between g77 (Linux) |
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and f77 (SGI) generated output gives: |
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T S U V |
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C D M c m s m s m s m s |
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n p a R g m m e . m m e . m m e . m m e . |
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f n k u 2 i a a d i a a d i a a d i a a d |
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g d e n d n x n . n x n . n x n . n x n . |
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Y Y Y Y 8 10 9 11 10 9 11 13 10 9 8 8 9 8 9 8 9 FAIL lab_sea |
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Instructions for running default Experiment |
Instructions for generating 1-CPU and 2-CPU executables |
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=========================================== |
======================================================= |
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Compiling the code: |
Generating 1-CPU executable: |
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cd verification/lab_sea/input |
cd MITgcm/verification/lab_sea |
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ln -sf ../code/*.h . |
mkdir build |
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../../../tools/genmake -makefile |
cd build |
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../../../tools/genmake2 |
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make clean |
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make depend |
make depend |
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make |
make |
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mv mitgcmuv mitgcmuv_1 |
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Running the code: |
Generating 2-CPU executable: |
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mitgcmuv >&! output.txt |
cd ../code |
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\mv SIZE.h SIZE.h_1 |
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\mv SIZE.h_mpi SIZE.h |
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../../../tools/genmake2 -mpi |
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make clean |
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make depend |
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make |
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mv mitgcmuv mitgcmuv_2x1 |
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Instructions for running Experiment 1 |
| 85 |
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===================================== |
| 86 |
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This is a 1-cpu, 10-hour integration used to make sure that all |
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the files are available and that the sea-ice model compiles and |
| 89 |
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runs. The reading of atmospheric forcing files and the computation |
| 90 |
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of open-water bulk fluxes are carried out within pkg/seaice. |
| 91 |
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| 92 |
There is comparison output in: |
To run Experiment 1: |
| 93 |
diff output.txt ../results/output.txt | more |
cd ../input |
| 94 |
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./mitgcmuv_1 >&! output.txt |
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Matlab comparison script: |
Use matlab script lookat_exp1.m to compare the output |
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of exp1 with that from checkpoint51f sea-ice code: |
| 98 |
cd ../../../verification/lab_sea/matlab |
cd ../../../verification/lab_sea/matlab |
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matlab |
matlab |
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lookat_exp |
lookat_ice |
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Instructions for running Experiment 2 |
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===================================== |
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This is a 2-cpu, 10-hour integration. |
| 107 |
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To run Experiment 2: |
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cd ../../../verification/lab_sea/input |
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mpirun -np 2 mitgcmuv_2x1 |
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