fixed error in which constant nsquared was not put into log space before use in the linear solution.  Also made the import of atm_utilities functions more explicit
fixed error in which constant nsquared was not put into log space before use in the linear solution.  Also made the import of atm_utilities functions more explicit

gutmann/icar,gutmann/icar,gutmann/icar,NCAR/icar,NCAR/icar,NCAR/icar