The files included in MITgcm_inputs.tar.gz were/are necessary to run the MITgcm_ocean model from within the DART framework. They are too big to include with the DART code tree, so they are provided here with no guarantee that they will work with your instance of the MITgcm ocean model, etc.

[thoar@mirage2 ~]$ tar -tzvf MITgcm_inputs.tar.gz
-rw-r--r-- thoar/ncar   230400 2008-05-21 10:30:32 inputs/bathymetry.bin
-rw-r--r-- thoar/ncar     3175 2008-07-28 16:50:11 inputs/data
-rw-r--r-- thoar/ncar      150 2008-06-17 17:38:39 inputs/data.cal
-rw-r--r-- thoar/ncar    15167 2008-05-21 13:18:58 inputs/data.exf
-rw-r--r-- thoar/ncar      133 2008-05-21 12:17:43 inputs/data.kpp
-rw-r--r-- thoar/ncar      733 2008-05-21 12:16:19 inputs/data.obcs
-rw-r--r-- thoar/ncar      137 2008-05-21 12:16:37 inputs/data.pkg
-rw-r--r-- thoar/ncar      303 2008-05-21 10:29:27 inputs/eedata
-rw-r--r-- thoar/ncar   230400 2008-05-21 12:22:33 inputs/gom_H_199601.bin
-rw-r--r-- thoar/ncar  9216000 2008-05-21 12:22:09 inputs/gom_S_199601.bin
-rw-r--r-- thoar/ncar  9216000 2008-05-21 12:22:17 inputs/gom_T_199601.bin
-rw-r--r-- thoar/ncar  9216000 2008-05-21 12:22:23 inputs/gom_U_199601.bin
-rw-r--r-- thoar/ncar  9216000 2008-05-21 12:22:28 inputs/gom_V_199601.bin
-rw-r--r-- thoar/ncar  2764800 2008-05-21 12:26:29 inputs/lev05_monthly_sss_relax.bin
-rw-r--r-- thoar/ncar  2764800 2008-05-21 12:26:18 inputs/lev05_monthly_sst_relax.bin
-rw-r--r-- thoar/ncar  2237952 2008-05-21 12:26:57 inputs/ncep_air_19960101.bin
-rw-r--r-- thoar/ncar  2237952 2008-05-21 12:27:51 inputs/ncep_dlwrf_19960101.bin
-rw-r--r-- thoar/ncar  2237952 2008-05-21 12:27:21 inputs/ncep_dswrf_19960101.bin
-rw-r--r-- thoar/ncar  2237952 2008-05-21 12:27:32 inputs/ncep_nswrs_19960101.bin
-rw-r--r-- thoar/ncar  2237952 2008-05-21 12:26:47 inputs/ncep_prate_19960101.bin
-rw-r--r-- thoar/ncar  2237952 2008-05-21 12:27:11 inputs/ncep_shum_19960101.bin
-rw-r--r-- thoar/ncar  2237952 2008-05-21 12:28:05 inputs/ncep_uwnd_19960101.bin
-rw-r--r-- thoar/ncar  2237952 2008-05-21 12:28:13 inputs/ncep_vwnd_19960101.bin
-rw-r--r-- thoar/ncar 21600000 2008-05-21 12:49:38 inputs/Rs_SobcsE_52_01_nPx1.bin
-rw-r--r-- thoar/ncar 24576000 2008-05-21 12:50:29 inputs/Rs_SobcsN_52_01_nPy1.bin
-rw-r--r-- thoar/ncar 21600000 2008-05-21 12:49:23 inputs/Rs_TobcsE_52_01_nPx1.bin
-rw-r--r-- thoar/ncar 24576000 2008-05-21 12:50:17 inputs/Rs_TobcsN_52_01_nPy1.bin
-rw-r--r-- thoar/ncar 21600000 2008-05-21 12:48:54 inputs/Rs_UobcsE_52_01_nPx1_c1.bin
-rw-r--r-- thoar/ncar 24576000 2008-05-21 12:49:53 inputs/Rs_UobcsN_52_01_nPy1.bin
-rw-r--r-- thoar/ncar 21600000 2008-05-21 12:49:10 inputs/Rs_VobcsE_52_01_nPx1.bin
-rw-r--r-- thoar/ncar 24576000 2008-05-21 12:50:05 inputs/Rs_VobcsN_52_01_nPy1_c1.bin
-rw-r--r-- thoar/ncar  2764800 2008-05-21 12:28:26 inputs/run-off.bin_1x1

All I know is that I needed them to test both the free run and the assimilation experiments.

For more information, see the README in the MITgcm_ocean/inputs directory of DART.