#include <misc.h> #include <preproc.h> module mkarbinitMod 1 contains !----------------------------------------------------------------------- !BOP ! ! !IROUTINE: mkarbinit ! ! !INTERFACE: subroutine mkarbinit() 1,13 ! ! !DESCRIPTION: ! Initializes the following time varying variables: ! water : h2osno, h2ocan, h2osoi_liq, h2osoi_ice, h2osoi_vol ! snow : snowdp, snl, dz, z, zi ! temperature: t_soisno, t_veg, t_grnd ! ! !USES: use shr_kind_mod , only : r8 => shr_kind_r8 use shr_const_mod, only : SHR_CONST_TKFRZ use clmtype use clm_varpar , only : nlevsoi, nlevgrnd, nlevsno, nlevlak, nlevurb use clm_varcon , only : bdsno, istice, istwet, istsoil, isturb, & denice, denh2o, spval, sb, icol_road_perv, & icol_road_imperv, icol_roof, icol_sunwall, & icol_shadewall use clm_varcon , only : istice_mec, h2osno_max use clm_varctl , only : iulog, pertlim use spmdMod , only : masterproc use decompMod , only : get_proc_bounds use shr_sys_mod , only : shr_sys_flush use SNICARMod , only : snw_rds_min ! ! !ARGUMENTS: implicit none ! ! !CALLED FROM: ! subroutine initialize in module initializeMod ! ! !REVISION HISTORY: ! Created by Mariana Vertenstein ! 3/07/08 Keith Oleson: initialize h2osoi_vol for all soil layers to 0.3 ! 3/18/08 David Lawrence, initialize deep layers ! 03/28/08 Mark Flanner, initialize snow aerosols and grain size ! ! !LOCAL VARIABLES: ! ! local pointers to implicit in arguments ! integer , pointer :: pcolumn(:) ! column index associated with each pft integer , pointer :: ctype(:) ! column type integer , pointer :: clandunit(:) ! landunit index associated with each column integer , pointer :: ltype(:) ! landunit type logical , pointer :: lakpoi(:) ! true => landunit is a lake point integer , pointer :: plandunit(:) ! landunit index associated with each pft logical , pointer :: urbpoi(:) ! true => landunit is an urban point logical , pointer :: ifspecial(:) ! true => landunit is not vegetated real(r8), pointer :: dz(:,:) ! layer thickness depth (m) real(r8), pointer :: watsat(:,:) ! volumetric soil water at saturation (porosity) (nlevgrnd) real(r8), pointer :: h2osoi_ice(:,:) ! ice lens (kg/m2) real(r8), pointer :: h2osoi_liq(:,:) ! liquid water (kg/m2) real(r8), pointer :: bsw2(:,:) ! Clapp and Hornberger "b" for CN code real(r8), pointer :: psisat(:,:) ! soil water potential at saturation for CN code (MPa) real(r8), pointer :: vwcsat(:,:) ! volumetric water content at saturation for CN code (m3/m3) real(r8), pointer :: zi(:,:) ! interface level below a "z" level (m) real(r8), pointer :: wa(:) ! water in the unconfined aquifer (mm) real(r8), pointer :: wt(:) ! total water storage (unsaturated soil water + groundwater) (mm) real(r8), pointer :: zwt(:) ! water table depth (m) ! ! local pointers to implicit out arguments ! integer , pointer :: snl(:) ! number of snow layers real(r8), pointer :: t_soisno(:,:) ! soil temperature (Kelvin) (-nlevsno+1:nlevgrnd) real(r8), pointer :: t_lake(:,:) ! lake temperature (Kelvin) (1:nlevlak) real(r8), pointer :: t_grnd(:) ! ground temperature (Kelvin) real(r8), pointer :: t_veg(:) ! vegetation temperature (Kelvin) real(r8), pointer :: t_ref2m(:) ! 2 m height surface air temperature (Kelvin) real(r8), pointer :: t_ref2m_u(:) ! Urban 2 m height surface air temperature (Kelvin) real(r8), pointer :: t_ref2m_r(:) ! Rural 2 m height surface air temperature (Kelvin) real(r8), pointer :: h2osoi_vol(:,:) ! volumetric soil water (0<=h2osoi_vol<=watsat) [m3/m3] real(r8), pointer :: h2ocan_col(:) ! canopy water (mm H2O) (column-level) real(r8), pointer :: h2ocan_pft(:) ! canopy water (mm H2O) (pft-level) real(r8), pointer :: h2osno(:) ! snow water (mm H2O) real(r8), pointer :: snowdp(:) ! snow height (m) real(r8), pointer :: eflx_lwrad_out(:) ! emitted infrared (longwave) radiation (W/m**2) real(r8), pointer :: soilpsi(:,:) ! soil water potential in each soil layer (MPa) real(r8), pointer :: snw_rds(:,:) ! effective snow grain radius (col,lyr) [microns, m^-6] real(r8), pointer :: snw_rds_top(:) ! snow grain size, top (col) [microns] real(r8), pointer :: sno_liq_top(:) ! liquid water fraction (mass) in top snow layer (col) [frc] real(r8), pointer :: mss_bcpho(:,:) ! mass of hydrophobic BC in snow (col,lyr) [kg] real(r8), pointer :: mss_bcphi(:,:) ! mass of hydrophillic BC in snow (col,lyr) [kg] real(r8), pointer :: mss_bctot(:,:) ! total mass of BC (pho+phi) (col,lyr) [kg] real(r8), pointer :: mss_bc_col(:) ! total mass of BC in snow column (col) [kg] real(r8), pointer :: mss_bc_top(:) ! total mass of BC in top snow layer (col) [kg] real(r8), pointer :: mss_cnc_bcphi(:,:) ! mass concentration of BC species 1 (col,lyr) [kg/kg] real(r8), pointer :: mss_cnc_bcpho(:,:) ! mass concentration of BC species 2 (col,lyr) [kg/kg] real(r8), pointer :: mss_ocpho(:,:) ! mass of hydrophobic OC in snow (col,lyr) [kg] real(r8), pointer :: mss_ocphi(:,:) ! mass of hydrophillic OC in snow (col,lyr) [kg] real(r8), pointer :: mss_octot(:,:) ! total mass of OC (pho+phi) (col,lyr) [kg] real(r8), pointer :: mss_oc_col(:) ! total mass of OC in snow column (col) [kg] real(r8), pointer :: mss_oc_top(:) ! total mass of OC in top snow layer (col) [kg] real(r8), pointer :: mss_cnc_ocphi(:,:) ! mass concentration of OC species 1 (col,lyr) [kg/kg] real(r8), pointer :: mss_cnc_ocpho(:,:) ! mass concentration of OC species 2 (col,lyr) [kg/kg] real(r8), pointer :: mss_dst1(:,:) ! mass of dust species 1 in snow (col,lyr) [kg] real(r8), pointer :: mss_dst2(:,:) ! mass of dust species 2 in snow (col,lyr) [kg] real(r8), pointer :: mss_dst3(:,:) ! mass of dust species 3 in snow (col,lyr) [kg] real(r8), pointer :: mss_dst4(:,:) ! mass of dust species 4 in snow (col,lyr) [kg] real(r8), pointer :: mss_dsttot(:,:) ! total mass of dust in snow (col,lyr) [kg] real(r8), pointer :: mss_dst_col(:) ! total mass of dust in snow column (col) [kg] real(r8), pointer :: mss_dst_top(:) ! total mass of dust in top snow layer (col) [kg] real(r8), pointer :: mss_cnc_dst1(:,:) ! mass concentration of dust species 1 (col,lyr) [kg/kg] real(r8), pointer :: mss_cnc_dst2(:,:) ! mass concentration of dust species 2 (col,lyr) [kg/kg] real(r8), pointer :: mss_cnc_dst3(:,:) ! mass concentration of dust species 3 (col,lyr) [kg/kg] real(r8), pointer :: mss_cnc_dst4(:,:) ! mass concentration of dust species 4 (col,lyr) [kg/kg] ! ! ! !OTHER LOCAL VARIABLES: !EOP integer :: j,l,c,p ! indices integer :: nlevs ! number of levels integer :: begp, endp ! per-proc beginning and ending pft indices integer :: begc, endc ! per-proc beginning and ending column indices integer :: begl, endl ! per-proc beginning and ending landunit indices integer :: begg, endg ! per-proc gridcell ending gridcell indices real(r8):: vwc,psi ! for calculating soilpsi real(r8):: pertval ! for calculating temperature perturbation !----------------------------------------------------------------------- if ( masterproc )then write(iulog,*) 'Setting initial data to non-spun up values' if ( pertlim /= 0.0_r8 ) & write(iulog,*) 'Applying perturbation to initial surface temperature' end if ! Assign local pointers to derived subtypes components (landunit-level) ltype => clm3%g%l%itype lakpoi => clm3%g%l%lakpoi ifspecial => clm3%g%l%ifspecial urbpoi => clm3%g%l%urbpoi ! Assign local pointers to derived subtypes components (column-level) ctype => clm3%g%l%c%itype clandunit => clm3%g%l%c%landunit snl => clm3%g%l%c%cps%snl dz => clm3%g%l%c%cps%dz watsat => clm3%g%l%c%cps%watsat bsw2 => clm3%g%l%c%cps%bsw2 vwcsat => clm3%g%l%c%cps%vwcsat psisat => clm3%g%l%c%cps%psisat soilpsi => clm3%g%l%c%cps%soilpsi h2osoi_ice => clm3%g%l%c%cws%h2osoi_ice h2osoi_liq => clm3%g%l%c%cws%h2osoi_liq h2osoi_vol => clm3%g%l%c%cws%h2osoi_vol h2ocan_col => clm3%g%l%c%cws%pws_a%h2ocan snowdp => clm3%g%l%c%cps%snowdp h2osno => clm3%g%l%c%cws%h2osno t_soisno => clm3%g%l%c%ces%t_soisno t_lake => clm3%g%l%c%ces%t_lake t_grnd => clm3%g%l%c%ces%t_grnd zi => clm3%g%l%c%cps%zi wa => clm3%g%l%c%cws%wa wt => clm3%g%l%c%cws%wt zwt => clm3%g%l%c%cws%zwt snw_rds => clm3%g%l%c%cps%snw_rds snw_rds_top => clm3%g%l%c%cps%snw_rds_top sno_liq_top => clm3%g%l%c%cps%sno_liq_top mss_bcpho => clm3%g%l%c%cps%mss_bcpho mss_bcphi => clm3%g%l%c%cps%mss_bcphi mss_bctot => clm3%g%l%c%cps%mss_bctot mss_bc_col => clm3%g%l%c%cps%mss_bc_col mss_bc_top => clm3%g%l%c%cps%mss_bc_top mss_cnc_bcphi => clm3%g%l%c%cps%mss_cnc_bcphi mss_cnc_bcpho => clm3%g%l%c%cps%mss_cnc_bcpho mss_ocpho => clm3%g%l%c%cps%mss_ocpho mss_ocphi => clm3%g%l%c%cps%mss_ocphi mss_octot => clm3%g%l%c%cps%mss_octot mss_oc_col => clm3%g%l%c%cps%mss_oc_col mss_oc_top => clm3%g%l%c%cps%mss_oc_top mss_cnc_ocphi => clm3%g%l%c%cps%mss_cnc_ocphi mss_cnc_ocpho => clm3%g%l%c%cps%mss_cnc_ocpho mss_dst1 => clm3%g%l%c%cps%mss_dst1 mss_dst2 => clm3%g%l%c%cps%mss_dst2 mss_dst3 => clm3%g%l%c%cps%mss_dst3 mss_dst4 => clm3%g%l%c%cps%mss_dst4 mss_dsttot => clm3%g%l%c%cps%mss_dsttot mss_dst_col => clm3%g%l%c%cps%mss_dst_col mss_dst_top => clm3%g%l%c%cps%mss_dst_top mss_cnc_dst1 => clm3%g%l%c%cps%mss_cnc_dst1 mss_cnc_dst2 => clm3%g%l%c%cps%mss_cnc_dst2 mss_cnc_dst3 => clm3%g%l%c%cps%mss_cnc_dst3 mss_cnc_dst4 => clm3%g%l%c%cps%mss_cnc_dst4 ! Assign local pointers to derived subtypes components (pft-level) pcolumn => clm3%g%l%c%p%column h2ocan_pft => clm3%g%l%c%p%pws%h2ocan t_veg => clm3%g%l%c%p%pes%t_veg t_ref2m => clm3%g%l%c%p%pes%t_ref2m t_ref2m_u => clm3%g%l%c%p%pes%t_ref2m_u t_ref2m_r => clm3%g%l%c%p%pes%t_ref2m_r plandunit => clm3%g%l%c%p%landunit eflx_lwrad_out => clm3%g%l%c%p%pef%eflx_lwrad_out ! Determine subgrid bounds on this processor call get_proc_bounds(begg, endg, begl, endl, begc, endc, begp, endp) ! NOTE: h2ocan, h2osno, and snowdp has valid values everywhere ! canopy water (pft level) do p = begp, endp h2ocan_pft(p) = 0._r8 ! added for canopy water mass balance under dynamic pft weights !clm3%g%l%c%p%pps%tlai(p) = 0._r8 !clm3%g%l%c%p%pps%tsai(p) = 0._r8 !clm3%g%l%c%p%pps%elai(p) = 0._r8 !clm3%g%l%c%p%pps%esai(p) = 0._r8 !clm3%g%l%c%p%pps%htop(p) = 0._r8 !clm3%g%l%c%p%pps%hbot(p) = 0._r8 !clm3%g%l%c%p%pps%frac_veg_nosno_alb(p) = 0._r8 end do do c = begc,endc ! canopy water (column level) h2ocan_col(c) = 0._r8 ! snow water l = clandunit(c) ! Note: Glacier_mec columns are initialized with half the maximum snow cover. ! This gives more realistic values of qflx_glcice sooner in the simulation ! for columns with net ablation, at the cost of delaying ice formation ! in columns with net accumulation. if (ltype(l)==istice) then h2osno(c) = h2osno_max elseif (ltype(l)==istice_mec) then h2osno(c) = 0.5_r8 * h2osno_max ! 50 cm if h2osno_max = 1 m else h2osno(c) = 0._r8 endif ! snow depth snowdp(c) = h2osno(c) / bdsno end do ! Set snow layer number, depth and thickiness call snowdp2lev(begc, endc) ! Set snow/soil temperature, note: ! t_soisno only has valid values over non-lake ! t_lake only has valid values over lake ! t_grnd has valid values over all land ! t_veg has valid values over all land ! NOTE: THESE MEMORY COPIES ARE INEFFICIENT -- SINCE nlev LOOP IS NESTED FIRST!!!! do c = begc,endc t_soisno(c,-nlevsno+1:nlevgrnd) = spval t_lake(c,1:nlevlak) = spval l = clandunit(c) if (.not. lakpoi(l)) then !not lake t_soisno(c,-nlevsno+1:0) = spval if (snl(c) < 0) then !snow layer temperatures do j = snl(c)+1, 0 t_soisno(c,j) = 250._r8 enddo endif if (ltype(l)==istice .or. ltype(l)==istice_mec) then do j = 1, nlevgrnd t_soisno(c,j) = 250._r8 end do else if (ltype(l) == istwet) then do j = 1, nlevgrnd t_soisno(c,j) = 277._r8 end do else if (ltype(l) == isturb) then #if (defined VANCOUVER) if (ctype(c) == icol_road_perv .or. ctype(c) == icol_road_imperv) then ! Set road top layer to initial air temperature and interpolate other ! layers down to 20C in bottom layer do j = 1, nlevurb t_soisno(c,j) = 297.56 - (j-1) * ((297.56-293.16)/(nlevurb-1)) end do ! Set wall and roof layers to initial air temperature else if (ctype(c) == icol_sunwall .or. ctype(c) == icol_shadewall .or. ctype(c) == icol_roof) then do j = 1, nlevurb t_soisno(c,j) = 297.56 end do else do j = 1, nlevurb t_soisno(c,j) = 283._r8 end do end if #elif (defined MEXICOCITY) if (ctype(c) == icol_road_perv .or. ctype(c) == icol_road_imperv) then ! Set road top layer to initial air temperature and interpolate other ! layers down to 22C in bottom layer do j = 1, nlevurb t_soisno(c,j) = 289.46 - (j-1) * ((289.46-295.16)/(nlevurb-1)) end do ! Set wall and roof layers to initial air temperature else if (ctype(c) == icol_sunwall .or. ctype(c) == icol_shadewall .or. ctype(c) == icol_roof) then do j = 1, nlevurb t_soisno(c,j) = 289.46 end do else do j = 1, nlevurb t_soisno(c,j) = 283._r8 end do end if #elif (defined GRANDVIEW) if (ctype(c) == icol_road_perv .or. ctype(c) == icol_road_imperv) then ! Set road layers to 18.5C do j = 1, nlevurb t_soisno(c,j) = 291.66_r8 end do else if (ctype(c) == icol_sunwall .or. ctype(c) == icol_shadewall) then ! Set wall layers to 18.35C do j = 1, nlevurb t_soisno(c,j) = 291.51_r8 end do else if (ctype(c) == icol_roof) then ! Set roof layers to 18.5C do j = 1, nlevurb t_soisno(c,j) = 291.66_r8 end do end if #else if (ctype(c) == icol_road_perv .or. ctype(c) == icol_road_imperv) then do j = 1, nlevurb t_soisno(c,j) = 274._r8 end do ! Set sunwall, shadewall, roof to fairly high temperature to avoid initialization ! shock from large heating/air conditioning flux else if (ctype(c) == icol_sunwall .or. ctype(c) == icol_shadewall & .or. ctype(c) == icol_roof) then do j = 1, nlevurb t_soisno(c,j) = 292._r8 end do end if #endif else do j = 1, nlevgrnd t_soisno(c,j) = 274._r8 end do endif t_grnd(c) = t_soisno(c,snl(c)+1) else !lake t_lake(c,1:nlevlak) = 277._r8 t_grnd(c) = t_lake(c,1) endif if ( pertlim /= 0.0_r8 )then if (.not. lakpoi(l)) then !not lake if ( ltype(l) == isturb) then nlevs = nlevurb else nlevs = nlevgrnd end if do j = 1, nlevs call random_number (pertval) pertval = 2._r8*pertlim*(0.5_r8 - pertval) t_soisno(c,j) = t_soisno(c,j)*(1._r8 + pertval) end do t_grnd(c) = t_soisno(c,snl(c)+1) else !lake do j = 1, nlevlak call random_number (pertval) pertval = 2._r8*pertlim*(0.5_r8 - pertval) t_lake(c,j) = t_lake(c,j)*(1._r8 + pertval) end do t_grnd(c) = t_lake(c,1) endif end if end do do p = begp, endp c = pcolumn(p) l = plandunit(p) #if (defined VANCOUVER) t_veg(p) = 297.56 t_ref2m(p) = 297.56 if (urbpoi(l)) then t_ref2m_u(p) = 297.56 else t_ref2m_u(p) = spval end if if (ifspecial(l)) then t_ref2m_r(p) = spval else t_ref2m_r(p) = 297.56 end if #elif (defined MEXICOCITY) t_veg(p) = 289.46 t_ref2m(p) = 289.46 if (urbpoi(l)) then t_ref2m_u(p) = 289.46 else t_ref2m_u(p) = spval end if if (ifspecial(l)) then t_ref2m_r(p) = spval else t_ref2m_r(p) = 289.46 end if #elif (defined GRANDVIEW) ! Set to 19.0C t_veg(p) = 292.16 t_ref2m(p) = 292.16 if (urbpoi(l)) then t_ref2m_u(p) = 292.16 else t_ref2m_u(p) = spval end if if (ifspecial(l)) then t_ref2m_r(p) = spval else t_ref2m_r(p) = 292.16 end if #else t_veg(p) = 283._r8 t_ref2m(p) = 283._r8 if (urbpoi(l)) then t_ref2m_u(p) = 283._r8 else t_ref2m_u(p) = spval end if if (ifspecial(l)) then t_ref2m_r(p) = spval else t_ref2m_r(p) = 283._r8 end if #endif eflx_lwrad_out(p) = sb * (t_grnd(c))**4 end do ! Set snow/soil ice and liquid mass ! volumetric water is set first and liquid content and ice lens are obtained ! NOTE: h2osoi_vol, h2osoi_liq and h2osoi_ice only have valid values over soil ! and urban pervious road (other urban columns have zero soil water) h2osoi_vol(begc:endc, 1:) = spval h2osoi_liq(begc:endc,-nlevsno+1:) = spval h2osoi_ice(begc:endc,-nlevsno+1:) = spval wa(begc:endc) = 5000._r8 wt(begc:endc) = 5000._r8 zwt(begc:endc) = 0._r8 do c = begc,endc l = clandunit(c) if (.not. lakpoi(l)) then !not lake if (ltype(l) == isturb) then if (ctype(c) == icol_road_perv) then wa(c) = 4800._r8 wt(c) = wa(c) zwt(c) = (25._r8 + zi(c,nlevsoi)) - wa(c)/0.2_r8 /1000._r8 ! One meter below soil column else wa(c) = spval wt(c) = spval zwt(c) = spval end if else wa(c) = 4800._r8 wt(c) = wa(c) zwt(c) = (25._r8 + zi(c,nlevsoi)) - wa(c)/0.2_r8 /1000._r8 ! One meter below soil column end if end if end do do c = begc,endc l = clandunit(c) if (.not. lakpoi(l)) then !not lake ! volumetric water if (ltype(l) == istsoil) then nlevs = nlevgrnd do j = 1, nlevs if (j > nlevsoi) then h2osoi_vol(c,j) = 0.0_r8 else h2osoi_vol(c,j) = 0.3_r8 endif end do else if (ltype(l) == isturb) then nlevs = nlevurb do j = 1, nlevs if (ctype(c) == icol_road_perv .and. j <= nlevsoi) then #if (defined GRANDVIEW) h2osoi_vol(c,j) = 0.0_r8 #else h2osoi_vol(c,j) = 0.3_r8 #endif else h2osoi_vol(c,j) = 0.0_r8 end if end do else if (ltype(l) == istwet) then nlevs = nlevgrnd do j = 1, nlevs if (j > nlevsoi) then h2osoi_vol(c,j) = 0.0_r8 else h2osoi_vol(c,j) = 1.0_r8 endif end do else if (ltype(l) == istice .or. ltype(l) == istice_mec) then nlevs = nlevgrnd do j = 1, nlevs h2osoi_vol(c,j) = 1.0_r8 end do endif do j = 1, nlevs h2osoi_vol(c,j) = min(h2osoi_vol(c,j),watsat(c,j)) ! soil layers if (t_soisno(c,j) <= SHR_CONST_TKFRZ) then h2osoi_ice(c,j) = dz(c,j)*denice*h2osoi_vol(c,j) h2osoi_liq(c,j) = 0._r8 else h2osoi_ice(c,j) = 0._r8 h2osoi_liq(c,j) = dz(c,j)*denh2o*h2osoi_vol(c,j) endif end do #if (defined CN) || (defined CASA) ! soil water potential (added 10/21/03, PET) ! required for CN and CASA code if (ltype(l) == istsoil) then nlevs = nlevgrnd do j = 1, nlevs if (h2osoi_liq(c,j) > 0._r8) then vwc = h2osoi_liq(c,j)/(dz(c,j)*denh2o) psi = psisat(c,j) * (vwc/vwcsat(c,j))**bsw2(c,j) soilpsi(c,j) = max(psi, -15.0_r8) soilpsi(c,j) = min(soilpsi(c,j),0.0_r8) end if end do end if #endif end if end do ! Set snow do j = -nlevsno+1, 0 do c = begc,endc l = clandunit(c) if (.not. lakpoi(l)) then !not lake if (j > snl(c)) then h2osoi_ice(c,j) = dz(c,j)*250._r8 h2osoi_liq(c,j) = 0._r8 end if end if end do end do ! initialize SNICAR fields: do c = begc,endc mss_bctot(c,:) = 0._r8 mss_bcpho(c,:) = 0._r8 mss_bcphi(c,:) = 0._r8 mss_cnc_bcphi(c,:)=0._r8 mss_cnc_bcpho(c,:)=0._r8 mss_octot(c,:) = 0._r8 mss_ocpho(c,:) = 0._r8 mss_ocphi(c,:) = 0._r8 mss_cnc_ocphi(c,:)=0._r8 mss_cnc_ocpho(c,:)=0._r8 mss_dst1(c,:) = 0._r8 mss_dst2(c,:) = 0._r8 mss_dst3(c,:) = 0._r8 mss_dst4(c,:) = 0._r8 mss_dsttot(c,:) = 0._r8 mss_cnc_dst1(c,:)=0._r8 mss_cnc_dst2(c,:)=0._r8 mss_cnc_dst3(c,:)=0._r8 mss_cnc_dst4(c,:)=0._r8 if (snl(c) < 0) then snw_rds(c,snl(c)+1:0) = snw_rds_min snw_rds(c,-nlevsno+1:snl(c)) = 0._r8 snw_rds_top(c) = snw_rds_min sno_liq_top(c) = h2osoi_liq(c,snl(c)+1) / (h2osoi_liq(c,snl(c)+1)+h2osoi_ice(c,snl(c)+1)) elseif (h2osno(c) > 0._r8) then snw_rds(c,0) = snw_rds_min snw_rds(c,-nlevsno+1:-1) = 0._r8 snw_rds_top(c) = spval sno_liq_top(c) = spval else snw_rds(c,:) = 0._r8 snw_rds_top(c) = spval sno_liq_top(c) = spval endif enddo end subroutine mkarbinit end module mkarbinitMod