Corrected metadata for spatially varying bottom friction

[arango]

• There is a typo in Data/ROMS/CDL/grd_spherical.cdl. The spatially varying bottom friction arrays are defined at RHO-grid points:

          double rdrag(eta_rho, xi_rho) ;
                  rdrag:long_name = "linear bottom drag coefficient" ;
                  rdrag:units = "meter second-1 ;
                  rdrag:coordinates = "lon_rho lat_rho" ;
          double rdrag2(eta_rho, xi_rho) ;
                  rdrag2:long_name = "quadratic bottom drag coefficient" ;
                  rdrag2:coordinates = "lon_rho lat_rho" ;
          double ZoBot(eta_rho, xi_rho) ;
                  ZoBot:long_name = "time invariant, bottom roughness length" ;
                  ZoBot:units = "meter ;
                  ZoBot:coordinates = "lon_rho lat_rho" ;
  

Many thanks to Aijun Zhang for bringing this to my attention.

• I also corrected a typo in ad_set_vbc.F for 2D applications. Many thanks to Kate for reporting this problem.