Problems encountered when using code to compute stream functions

[2y1nbbq]

I am a novice in physical oceanography numerical simulation. When I tried to calculate the stream function using TRACMASS model, I found that the number of columns in the data were 21 times jmt. I tried to find out the reason by looking at the specific Fortran code, but I still couldn't figure it out. So I hope you can guide me. Thank you