25.3.9 fill_isolated_cells

This option converts all isolated ocean T cells into land cells. An ocean T cell T_i,k,j is isolated if the four surrounding U cells U_i,k,j, U_i-1,k,j, U_i-1,k,j-1, and U_i,k,j-1 at the same vertical level k are land cells. Potholes as well as trenches which are one T cell wide fall into this category.