diff --git a/physics/sfc_drv_ruc.F90 b/physics/sfc_drv_ruc.F90
index 985bee414..ec3a3c62b 100644
--- a/physics/sfc_drv_ruc.F90
+++ b/physics/sfc_drv_ruc.F90
@@ -16,8 +16,6 @@ module lsm_ruc
 
         public :: lsm_ruc_init, lsm_ruc_run, lsm_ruc_finalize
 
-        real(kind=kind_phys), parameter :: zero = 0.0d0, one = 1.0d0, epsln = 1.0d-10
-
       contains
 
 !> This subroutine calls set_soilveg_ruc() to specify vegetation and soil parameters for 
@@ -260,7 +258,7 @@ subroutine lsm_ruc_run                                            & ! inputs
      &       srflag, snoalb, isot, ivegsrc, fice, smcwlt2, smcref2,     &
      ! --- constants
      &       con_cp, con_rd, con_rv, con_g, con_pi, con_hvap,           &
-     &       con_fvirt,                                                 &
+     &       con_fvirt, min_seaice, con_tice, rhowater,                 &
      ! for water
      &       ch_wat, tskin_wat,                                         &
      ! --- in/outs for ice and land
@@ -291,11 +289,7 @@ subroutine lsm_ruc_run                                            & ! inputs
       implicit none
 
 !  ---  constant parameters:
-      real(kind=kind_phys), parameter :: rhoh2o  = 1000.0
       real(kind=kind_phys), parameter :: stbolt  = 5.670400e-8
-      real(kind=kind_phys), parameter :: cimin   = 0.15  !--- in GFS
-      !real(kind=kind_phys), parameter :: cimin   = 0.02 !--- minimum ice concentration, 0.15 in GFS
-      real(kind=kind_phys), parameter :: con_tice = 271.2
 
 !  ---  input:
       integer, intent(in) :: me, master
@@ -317,7 +311,8 @@ subroutine lsm_ruc_run                                            & ! inputs
       real (kind=kind_phys),  intent(in) :: delt
       real (kind=kind_phys),  intent(in) :: con_cp, con_rv, con_g,       &
                                             con_pi, con_rd,              &
-                                            con_hvap, con_fvirt
+                                            con_hvap, con_fvirt,         &
+                                            min_seaice, con_tice, rhowater
 
       logical, dimension(im), intent(in) :: flag_iter, flag_guess
       logical, dimension(im), intent(in) :: land, icy, lake
@@ -419,7 +414,7 @@ subroutine lsm_ruc_run                                            & ! inputs
      &     qsfc_ice, qsg_ice, qvg_ice, qcg_ice, soilt1_ice
 
 
-      real (kind=kind_phys) :: xice_threshold
+      real (kind=kind_phys) :: xice_threshold, cimin, rhoh2o
       real (kind=kind_phys) :: fwat, qsw, evapw, hfxw
 
       character(len=256) :: llanduse  !< Land-use dataset.  Valid values are :
@@ -454,6 +449,9 @@ subroutine lsm_ruc_run                                            & ! inputs
 
       chklowq = 1.
 
+      cimin = min_seaice
+      rhoh2o = rhowater
+
       do i  = 1, im ! i - horizontal loop
         ! - Set flag for ice points for uncoupled model (islmsk(i) == 4 when coupled to CICE)
         ! - Exclude ice on the lakes if the lake model is turned on.
diff --git a/physics/sfc_drv_ruc.meta b/physics/sfc_drv_ruc.meta
index ba61ed899..0017c5763 100644
--- a/physics/sfc_drv_ruc.meta
+++ b/physics/sfc_drv_ruc.meta
@@ -798,6 +798,33 @@
   kind = kind_phys
   intent = in
   optional = F
+[min_seaice]
+  standard_name = sea_ice_minimum
+  long_name = minimum sea ice value
+  units = frac
+  dimensions = ()
+  type = real
+  kind = kind_phys
+  intent = in
+  optional = F
+[con_tice]
+  standard_name = freezing_point_temperature_of_seawater
+  long_name = freezing point temperature of seawater
+  units = K
+  dimensions = ()
+  type = real
+  kind = kind_phys
+  intent = in
+  optional = F
+[rhowater]
+  standard_name = liquid_water_density
+  long_name = density of liquid water
+  units = kg m-3
+  dimensions = ()
+  type = real
+  kind = kind_phys
+  intent = in
+  optional = F
 [ch_wat]
   standard_name = surface_drag_coefficient_for_heat_and_moisture_in_air_over_ocean
   long_name = surface exchange coeff heat & moisture over ocean