anchor.diff:  		integer::convection
   		integer::windtype
   	end type physics_type
  -	
  +
  +        !! ++ trude
  +        type mp_options_type
  +                 real :: Nt_c
  +        end type mp_options_type
  +        !! -- trude
   	!------------------------------------------------
   	! store all model options
   	!------------------------------------------------
   	type options_type
  -		character (len=MAXVARLENGTH) :: version,comment
  +                character (len=MAXVARLENGTH) :: version,comment
   
   		! file names
   		character (len=MAXFILELENGTH) :: init_conditions_file
  
positive.code: 		
  		! defines which physics package to be used. 
  		type(physics_type)::physics
  		
  		integer :: warning_level        ! level of warnings to issue when checking options settings 0-10.  
  										! 0  = Don't print anything
  										! 1  = print serious warnings
  
negative.code: 										! 9  = stop on serious warnings 
  										! 10 = stop on all warnings
  	end type options_type
  end module data_structures	
  