Mask the input data by surface type flags: MASKSc
Masked area average specification (A,B): MSKFLcn
Compute ordinary masked area averages: MSKAP
Compute masked area average of the squares: MSKAPS
Compute masked area ave of squares of zonal aves: MSKAZS
Print masked area averages with time series plots: MSKAVPR
Name of surface type save tape to read: SFCTTAP
Name of surface type save tape to create: SFCTCRT
Process data over land only using a simple land mask.
Create a T42 Surface Type Save Tape.