Passing additional surface variables into the atmospheric model

[zhihong-tan]

A new boundary layer scheme (NCEP TKE-based eddy-diffusivity mass-flux scheme) is being implemented in the prototype-AM5 model, and it requires five additional surface variables (shflx, lhflx, wind, thv_atm, and thv_surf) as inputs. Thus, I made changes in the FMScoupler (please refer to its issues #92/#93), which would require adding a few lines in the atmos_null (atmos_model.F90) to include these variables in the land_ice_atmos_boundary_type structure.