more grazing updates

biogeochem/FatesLandUseChangeMod.F90

@@ -29,6 +29,7 @@ module FatesLandUseChangeMod
   public :: get_landuse_transition_rates
   public :: get_landusechange_rules
   public :: get_luh_statedata
+  public :: fates_grazing
 
 
   ! module data
@@ -298,4 +299,34 @@ subroutine CheckLUHData(luh_vector,modified_flag)
 
   end subroutine CheckLUHData
 
+  !----------------------------------------------------------------------------------------------------
+
+  subroutine fates_grazing(prt, ft, land_use_label, hite)
+
+    use PRTGenericMod,    only : leaf_organ
+    use PRTGenericMod,    only : prt_vartypes
+    use PRTLossFluxesMod, only : PRTHerbivoryLosses
+
+    ! apply grazing and browsing to plants as a function of PFT, height (for woody plants), and land use label.
+
+    class(prt_vartypes), intent(inout), pointer :: prt
+    integer, intent(in)  :: ft
+    integer, intent(in)  :: land_use-label
+    real(r8), intent(in) :: hite
+
+    real(r8) :: grazing_rate    ! rate of grazing (or browsing) of leaf tissue [day -1]
+
+    grazing_rate = fates_landuse_grazing_rate(land_use_label) * fates_landuse_grazing_palatability(ft)
+
+    if ( grazing_rate .gt. 0._r8) then
+       if (woody(ft)) then
+          grazing_rate = grazing_rate * &
+               max(0._r8, min(1._r8, (fates_landuse_grazing_maxheight - hite*fates_allom_crown_depth_frac(ft)/(hite - hite*fates_allom_crown_depth_frac(ft)))))
+       endif
+
+       call PRTHerbivoryLosses(prt, leaf_organ, grazing_rate)
+    end if
+
+  end subroutine fates_grazing
+
 end module FatesLandUseChangeMod

main/EDParamsMod.F90

@@ -134,6 +134,7 @@ module EDParamsMod
    character(len=param_string_length),parameter,public :: ED_name_history_coageclass_bin_edges = "fates_history_coageclass_bin_edges"
    character(len=param_string_length),parameter,public :: ED_name_history_damage_bin_edges = "fates_history_damage_bin_edges"
 
+
    ! Hydraulics Control Parameters (ONLY RELEVANT WHEN USE_FATES_HYDR = TRUE)
    ! ----------------------------------------------------------------------------------------------
    real(r8),protected,public :: hydr_kmax_rsurf1         !  maximum conducitivity for unit root surface 
@@ -246,6 +247,14 @@ module EDParamsMod
                                                         ! product pool (pprodharv10) of all woody PFT types
    character(len=param_string_length),parameter,public :: logging_name_pprodharv10="fates_landuse_pprodharv10_forest_mean"
 
+   ! grazing-related parameters
+   character(len=param_string_length),parameter,public :: ED_name_landuse_grazing_palatability = "fates_landuse_grazing_palatability"
+   character(len=param_string_length),parameter,public :: ED_name_landuse_grazing_rate = "fates_landuse_grazing_rate"
+   character(len=param_string_length),parameter,public :: ED_name_landuse_grazing_carbon_use_eff = "fates_landuse_grazing_carbon_use_eff"
+   character(len=param_string_length),parameter,public :: ED_name_landuse_grazing_maxheight = "fates_landuse_grazing_maxheight"
+   character(len=param_string_length),parameter,public :: ED_name_landuse_grazing_nitrogen_use_eff = "fates_landuse_grazing_nitrogen_use_eff"
+   character(len=param_string_length),parameter,public :: ED_name_landuse_grazing_phosphorus_use_eff = "fates_landuse_grazing_phosphorus_use_eff"
+
    real(r8),protected,public :: eca_plant_escalar  ! scaling factor for plant fine root biomass to 
                                                ! calculate nutrient carrier enzyme abundance (ECA)
 

main/FatesParametersInterface.F90

@@ -38,6 +38,7 @@ module FatesParametersInterface
   character(len=*), parameter, public :: dimension_name_hlm_pftno = 'fates_hlm_pftno'
   character(len=*), parameter, public :: dimension_name_history_damage_bins = 'fates_history_damage_bins'
   character(len=*), parameter, public :: dimension_name_damage = 'fates_damage_class'
+  character(len=*), parameter, public :: dimension_name_landuse = 'fates_landuseclass'
 
   ! Dimensions in the host namespace:
   character(len=*), parameter, public :: dimension_name_host_allpfts = 'allpfts'

parameter_files/fates_params_default.cdl

@@ -597,9 +597,6 @@ variables:
 	double fates_landuse_grazing_rate(fates_landuseclass) ;
 		fates_landuse_grazing_rate:units = "1/day" ;
 		fates_landuse_grazing_rate:long_name = "fraction of leaf biomass consumed by grazers per day" ;
-	double fates_landuse_pft_maxcancov(fates_landuseclass, fates_pft) ;
-		fates_landuse_pft_maxcancov:units = "area fraction" ;
-		fates_landuse_pft_maxcancov:long_name = "Maximum canopy coverage of each PFT in each land use class" ;
 	double fates_canopy_closure_thresh ;
 		fates_canopy_closure_thresh:units = "unitless" ;
 		fates_canopy_closure_thresh:long_name = "tree canopy coverage at which crown area allometry changes from savanna to forest value" ;
@@ -1462,13 +1459,6 @@ data:
 
  fates_landuse_grazing_rate = 0.0, 0.0, 0.07, 0.07, 0.0 ;
 
- fates_landuse_pft_maxcancov =
-  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
-  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
-  0.8, 0.8, 0.8, 0.8, 0.8, 0.8, 0.8, 0.8, 0.8, 1, 1, 1,
-  0.2, 0.2, 0.2, 0.2, 0.2, 0.2, 0.2, 0.2, 0.2, 1, 1, 1,
-  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 ;
-
  fates_canopy_closure_thresh = 0.8 ;
 
  fates_cnp_eca_plant_escalar = 1.25e-05 ;