| Variable name | Description |
| BEGDAY | - only set in INISET either to 0.0 or
through namelist INPRN |
| DELT | Diabatic timestep - is only altered in DSTEP, INISET and INISI. |
| DOY | Day Of Year - is only altered in IGCM3 and INISTR |
| IGC | (MG+2)*NHEM - number longitude levels stored in model
for however many degrees from equator, e.g. grid points at 10 degrees
North and 10 degrees South are clumped together, and so on. |
| JG | Number of grid levels in one hemisphere, i.e. usually
2*JG latitude levels |
| JH | The j-slice model is currently working on |
| KITS | - set in INISI either as 3 or through namelist INPRN |
| KBAL | - set through namelist INPBL in INIBAL (=5 in my example) |
| KOUNT | Timestep count - is only altered in IGCM3 and INISTR. Can equal
-KBAL(only if LBALAN is TRUE in INISTR), NINT(RKOUNT) (only in INISTR)
or KOUNT+1 |
| MG | Number of longitude levels |
| MGPP | MG+2 |
| NHEM | Number of hemispheres, ie. 2 or 1 |
| NL | Vertical levels??? |
| NLM, NLP, NLPP, NLA, NLB, NL2 | =NL -1, +1, +2, +3, +4, *NL |
| NN | ??? |
| NNP | NN+1 |
| PI2 | 2*pi, i.e. 6.28... |