anchor.diff:          real :: e_s,mr_s,a,b
   
           ! from http://www.dtic.mil/dtic/tr/fulltext/u2/778316.pdf
  -        !   Lowe, P.R. and J.M. Ficke., 1974: THE COMPUTATION OF SATURATION VAPOR PRESSURE 
  +        !   Lowe, P.R. and J.M. Ficke., 1974: THE COMPUTATION OF SATURATION VAPOR PRESSURE
           !       Environmental Prediction Research Facility, Technical Paper No. 4-74
           ! which references:
  -        !   Murray, F. W., 1967: On the computation of saturation vapor pressure. 
  +        !   Murray, F. W., 1967: On the computation of saturation vapor pressure.
           !       Journal of Applied Meteorology, Vol. 6, pp. 203-204.
  -        ! Also notes a 6th order polynomial and look up table as viable options. 
  +        ! Also notes a 6th order polynomial and look up table as viable options.
           if (temperature < freezing_threshold) then
               a = 21.8745584
               b = 7.66
  
positive.code:     !!  @param qc           cloud water mixing ratio [kg/kg]
      !!  @param qvsat        saturated mixing ratio   [kg/kg]
      !!  @param dt           time step                [sec.]
      !! 
      !!----------------------------------------------------------
      subroutine cloud_conversion(pressure,temperature,qv,qc,qvsat,dt)
          implicit none
  
negative.code:                             rain(i,j),snow(i,j),&
                              dt,dz(i,:,j),nz,((i==(nx/2+20)).and.(j==2)))
                  th(i,:,j) = temperature/pii(i,:,j)
  
              enddo
              ! where(qs(:,:,j)<0) qs(:,:,j) = 0
              ! where(qr(:,:,j)<0) qr(:,:,j) = 0
  