#if defined(L08_1A) ! *****************************COPYRIGHT******************************* ! (c) CROWN COPYRIGHT 2000, Met Office, All Rights Reserved. ! For further details please refer to the file COPYRIGHT.txt ! which you should have received as part of this distribution. ! *****************************COPYRIGHT******************************* ! SUBROUTINE SF_IMPL----------------------------------------------- ! ! Purpose: Calculate implicit correction to surface fluxes of heat, ! moisture and momentum. Also calculates screen level ! temperature and humidity as well as 10 m winds. ! ! Documentation: UMDP 24. ! !-------------------------------------------------------------------- ! Arguments :- SUBROUTINE sf_impl ( & ! IN values defining field dimensions and subset to be processed : off_x,off_y,row_length,rows,n_rows,land_pts, & ! IN soil/vegetation/land surface data : land_index,land_mask,nice, & ntiles,tile_index,tile_pts,sm_levels, & canhc_tile,canopy,flake,smc, & tile_frac,wt_ext_tile, & fland,flandg, & ! IN sea/sea-ice data : di,ice_fract,di_ncat,ice_fract_ncat,u_0,v_0, & ! IN everything not covered so far : pstar,lw_down,rad_sice,sw_tile,timestep, & t_soil,qw_1,tl_1,u_1,v_1,rhokm_u_1,rhokm_v_1,GAMMA, & alpha1,alpha1_sice,ashtf_prime,ashtf_prime_tile, & dtrdz_charney_grid_1,du_1,dv_1, & fqw_tile,epot_tile,fqw_ice,ftl_ice, & fraca,resfs,resft,rhokh,rhokh_tile,rhokh_sice, & rhokpm,rhokpm_pot,rhokpm_sice, & dtstar_tile,dtstar,z1, & z0hssi,z0mssi,z0h_tile,z0m_tile,cdr10m_u,cdr10m_v, & chr1p5m,chr1p5m_sice,ct_ctq_1,dqw_1,dtl_1,cq_cm_u_1,cq_cm_v_1, & l_neg_tstar, & flandg_u,flandg_v,anthrop_heat,l_sice_heatflux, & emis_tile,emis_soil, & ! IN additional variables used to calculate atmospheric cooling ! at the screen level l_co2_interactive, co2_mmr, co2_3d, & rho1, f3_at_p, ustargbm, & ! IN STASH flags :- simlt,smlt,slh,sq1p5,st1p5,su10,sv10, & ! INOUT data : ti,ti_gb,tstar, & tstar_land,tstar_sea,tstar_sice,tstar_ssi, & tstar_tile,snow_tile, & le_tile,radnet_sice,radnet_tile, & e_sea,fqw_1,ftl_1,ftl_tile,h_sea,olr,taux_1,tauy_1, & taux_land,taux_ssi,tauy_land,tauy_ssi, & tscrndcl_ssi,tscrndcl_tile,tstbtrans, & ! OUT Diagnostic not requiring STASH flags : ecan,ei_tile,esoil_tile, & sea_ice_htf,surf_ht_flux,surf_ht_flux_land,surf_ht_flux_sice, & surf_htf_tile,surf_ht_store, & ! OUT diagnostic requiring STASH flags : sice_mlt_htf,snomlt_surf_htf,latent_heat, & q1p5m,q1p5m_tile,t1p5m,t1p5m_tile,u10m,v10m, & ! OUT data required elsewhere in UM system : ecan_tile,ei,esoil,ext,snowmelt,melt_tile,rhokh_mix, & surf_ht_flux_sice_ncat, & error, & ! LOGICAL LTIMER lq_mix_bl, & l_flux_bc, & ltimer & ) USE c_mdi USE caoptr USE csigma USE c_lheat USE c_kappai USE c_r_cp USE c_0_dg_c USE surf_param, ONLY : ls, ip_scrndecpl2 USE ancil_info, ONLY: nsmax,ssi_pts,sea_pts,sice_pts, & sice_pts_ncat,ssi_index,sea_index,sice_index,sice_index_ncat, & fssi,sea_frac,sice_frac,sice_frac_ncat USE switches, ONLY: iscrntdiag USE jules_mod, ONLY: snowdep_surf USE snow_param, ONLY: rho_snow_const USE solinc_data, ONLY: sky, l_skyview USE parkind1, ONLY: jprb, jpim USE yomhook, ONLY: lhook, dr_hook IMPLICIT NONE ! Inputs :- ! (a) Defining horizontal grid and subset thereof to be processed. ! Checked for consistency. INTEGER & row_length & ! Local number of points on a row , rows & ! Local number of rows in a theta field , n_rows & ! Local number of rows in a v field , off_x & ! Size of small halo in i , off_y & ! Size of small halo in j. ,land_pts ! IN No of land points ! (c) Soil/vegetation/land surface parameters (mostly constant). LOGICAL & land_mask(row_length,rows) ! IN T if land, F elsewhere. INTEGER & land_index(land_pts) ! IN LAND_INDEX(I)=J => the Jth ! ! point in ROW_LENGTH,ROWS is the ! ! Ith land point. INTEGER & sm_levels & ! IN No. of soil moisture levels ,ntiles & ! IN No. of land tiles ,tile_index(land_pts,ntiles) & ! IN Index of tile points ,tile_pts(ntiles) & ! IN Number of tile points ,nice ! IN Number of sea ice catagories REAL & canhc_tile(land_pts,ntiles) & ! IN Areal heat capacity of canopy ! ! for land tiles (J/K/m2). ,canopy(land_pts,ntiles) & ! IN Surface/canopy water for ! ! snow-free land tiles (kg/m2) ,flake(land_pts,ntiles) & ! IN Lake fraction. ,smc(land_pts) & ! IN Available soil moisture (kg/m2). ,tile_frac(land_pts,ntiles) & ! IN Tile fractions including ! ! snow cover in the ice tile. ,wt_ext_tile(land_pts,sm_levels,ntiles) & ! ! IN Fraction of evapotranspiration ! ! extracted from each soil layer ! ! by each tile. ,fland(land_pts) & ! IN Land fraction on land pts. ,flandg(row_length,rows) & ! ! IN Land fraction on all pts. ,flandg_u(row_length,rows) & ! IN Land fraction on U grid. ,flandg_v(row_length,n_rows) & ! IN Land fraction on V grid. ,emis_tile(land_pts,ntiles) & ! IN Emissivity for land tiles ,emis_soil(land_pts) ! IN Emissivity of underlying soil ! (d) Sea/sea-ice data. REAL & di(row_length,rows) & ! IN "Equivalent thickness" of ! ! sea-ice GBM agregate (m). ,di_ncat(row_length,rows,nice) & ! IN "Equivalent thickness" of ! ! sea-ice catagories (m). ,ice_fract(row_length,rows) & ! IN Fraction of gridbox covered by ! ! sea-ice (decimal fraction). ,ice_fract_ncat(row_length,rows,nice) & ! IN Fraction of gridbox ! ! covered by sea-ice on catagories. ,u_0(row_length,rows) & ! IN W'ly component of surface ! ! current (m/s). ,v_0(row_length,n_rows) ! IN S'ly component of surface ! ! current (m/s). ! (f) Atmospheric + any other data not covered so far, incl control. REAL & pstar(row_length,rows) & ! IN Surface pressure (Pascals). ,lw_down(row_length,rows) & ! IN Surface downward LW radiation ! ! (W/m2). ,rad_sice(row_length,rows) & ! IN Surface net SW and downward LW ! ! radiation for sea-ice (W/sq m). ,sw_tile(land_pts,ntiles) & ! IN Surface net SW radiation on ! ! land tiles (W/m2). ,timestep & ! IN Timestep (seconds). ,t_soil(land_pts,sm_levels) & ! IN Soil temperatures (K). ,qw_1(row_length,rows) & ! IN Total water content ,tl_1(row_length,rows) & ! IN Ice/liquid water temperature ,u_1(1-off_x:row_length+off_x, & 1-off_y:rows+off_y) & ! IN W'ly wind component (m/s) ,v_1(1-off_x:row_length+off_x, & 1-off_y:n_rows+off_y) & ! IN S'ly wind component (m/s) ,rhokm_u_1(row_length,rows) & ! IN Exchange coefficients for ! ! momentum (on U-grid, with 1st ! ! and last rows undefined or, at ! ! present, set to "missing data") ,rhokm_u_land(row_length,rows) & ! ! IN Exchange coefficients for ! ! land momentum ! ! (on U-grid, with 1st ! ! and last rows undefined or, at ! ! present, set to "missing data") ,rhokm_u_ssi(row_length,rows) & ! IN Exchange coefficients for ! ! mean sea momentum ! ! (on U-grid, with 1st ! ! and last rows undefined or, at ! ! present, set to "missing data") ,rhokm_v_1(row_length,n_rows) & ! IN Exchange coefficients for ! ! momentum (on V-grid, with 1st ! ! and last rows undefined or, at ! ! present, set to "missing data") ,rhokm_v_land(row_length,n_rows) & ! ! IN Exchange coefficients for ! ! land momentum ! ! (on V-grid, with 1st ! ! and last rows undefined or, at ! ! present, set to "missing data") ,rhokm_v_ssi(row_length,n_rows) ! ! IN Exchange coefficients for ! ! mean sea momentum ! ! (on V-grid, with 1st ! ! and last rows undefined or, at ! ! present, set to "missing data") REAL GAMMA ! IN implicit weight in level 1 REAL & alpha1(land_pts,ntiles) & ! IN Mean gradient of saturated ! ! specific humidity with respect ! ! to temperature between the ! ! bottom model layer and tile ! ! surfaces ,alpha1_sice(row_length,rows) & ! IN ALPHA1 for sea-ice. ,ashtf_prime(row_length,rows) & ! IN Adjusted SEB coefficient for ! sea-ice ,ashtf_prime_tile(land_pts,ntiles) & ! IN Adjusted SEB coefficient for ! land tiles. ,ashtf_tile(land_pts,ntiles) & !IN Coefficient to calculate ! ! surface heat flux into land ! ! tiles. ,dtrdz_charney_grid_1(row_length,rows) & ! ! IN -g.dt/dp for model layers. ,fqw_tile(land_pts,ntiles) & ! IN Surface FQW for land tiles ,epot_tile(land_pts,ntiles) & ! IN surface tile potential ! ! evaporation ,fqw_ice(row_length,rows) & ! IN Surface FQW for sea-ice ,ftl_ice(row_length,rows) & ! IN Surface FTL for sea-ice ,fraca(land_pts,ntiles) & ! IN Fraction of surface moisture ! ! flux with only aerodynamic ! ! resistance for snow-free land ! ! tiles. ,resfs(land_pts,ntiles) & ! IN Combined soil, stomatal ! ! and aerodynamic resistance ! ! factor for fraction (1-FRACA) of ! ! snow-free land tiles. ,resft(land_pts,ntiles) & ! IN Total resistance factor. ! ! FRACA+(1-FRACA)*RESFS for ! ! snow-free land, 1 for snow. ,rhokh(row_length,rows) & ! IN Grid-box surface exchange ! ! coefficients ! ! (not used for JULES) ,rhokh_tile(land_pts,ntiles) & ! IN Surface exchange coefficients ! ! for land tiles ,rhokh_sice(row_length,rows) & ! IN Surface exchange coefficients ! ! for sea and sea-ice ,rhokpm(land_pts,ntiles) & ! IN Land surface exchange coeff. ! ! (not used for JULES) ,rhokpm_pot(land_pts,ntiles) & ! IN Land surface exchange coeff. ! ! for potential evaporation. ! ! (not used for JULES) ,rhokpm_sice(row_length,rows) & ! IN Sea-ice surface exchange coeff. ! ! (not used for JULES) ,dtstar_tile(land_pts,ntiles) & ! IN Change in TSTAR over timestep ! ! for land tiles ,dtstar(row_length,rows) ! IN Change is TSTAR over timestep ! ! for sea-ice REAL & z1(row_length,rows) & ! IN Height of lowest level (i.e. ! ! height of middle of lowest ! ! layer). ,z0hssi(row_length,rows) & ,z0mssi(row_length,rows) & ! IN Roughness lengths over sea (m) ,z0h_tile(land_pts,ntiles) & ! IN Tile roughness lengths for heat ! ! and moisture (m). ,z0m_tile(land_pts,ntiles) & ! IN Tile roughness lengths for ! ! momentum. ,cdr10m_u(row_length,rows) & ! IN Ratio of CD's reqd for ! ! calculation of 10 m wind. On ! ! U-grid; comments as per RHOKM. ,cdr10m_v(row_length,n_rows) & ! IN Ratio of CD's reqd for ! ! calculation of 10 m wind. On ! ! V-grid; comments as per RHOKM. ,chr1p5m(land_pts,ntiles) & ! IN Ratio of coefffs for calculation ! ! of 1.5m temp for land tiles. ,chr1p5m_sice(row_length,rows) & ! ! IN CHR1P5M for sea and sea-ice ! ! (leads ignored). ,ct_ctq_1(row_length,rows) & ! IN Coefficient in T and q ! ! tri-diagonal implicit matrix ,cq_cm_u_1(row_length,rows) & ! IN Coefficient in U tri-diagonal ! ! implicit matrix ,cq_cm_v_1(row_length,n_rows) & ! IN Coefficient in V tri-diagonal ! ! implicit matrix ,dqw_1(row_length,rows) & ! IN Level 1 increment to q field ,dtl_1(row_length,rows) & ! IN Level 1 increment to T field ,du_1(1-off_x:row_length+off_x, & 1-off_y:rows+off_y) & ! IN Level 1 increment to u wind ! ! field ,dv_1(1-off_x:row_length+off_x, & 1-off_y:n_rows+off_y) & ! IN Level 1 increment to v wind ! ! field ,anthrop_heat(land_pts,ntiles) ! IN Additional heat source on tiles ! for anthropogenic urban heat ! source (W/m2) ! IN Additional variables for screen-level diagnostics LOGICAL, INTENT(IN) :: l_co2_interactive ! Flag for interactive 3-D CO2 REAL, INTENT(IN) :: co2_mmr ! Initial or fixed mass mixing ratio ! of CO2 REAL, INTENT(IN) :: co2_3d(row_length,rows) ! 3-D field of CO2 REAL, INTENT(IN) :: rho1(row_length,rows) ! Density on lowest level REAL, INTENT(IN) :: f3_at_p(row_length,rows) ! Coriolis parameter REAL, INTENT(IN) :: uStargbm(row_length,rows) ! GBM surface friction velocity LOGICAL & ltimer & ! IN Logical switch for TIMER diags ,l_neg_tstar & ! IN Switch for -ve TSTAR error check ,l_flux_bc & ! IN SCM logical for prescribed ! surface flux forcing ,l_sice_heatflux ! IN T: semi-implicit update of TI LOGICAL & lq_mix_bl ! TRUE if mixing ratios used in ! ! boundary layer code ! STASH flags :- LOGICAL & simlt & ! IN Flag for SICE_MLT_HTF (q.v.) ,smlt & ! IN Flag for SNOMLT_SURF_HTF (q.v.) ,slh & ! IN Flag for LATENT_HEAT (q.v.) ,sq1p5 & ! IN Flag for Q1P5M (q.v.) ,st1p5 & ! IN Flag for T1P5M (q.v.) ,su10 & ! IN Flag for U10M (q.v.) ,sv10 ! IN Flag for V10M (q.v.) ! In/outs :- REAL & ti(row_length,rows,nice) & ! INOUT Sea-ice surface layer ! ! temperature (K). ,ti_gb(row_length,rows) & ! OUT GBM ice surface temperature (K) ! (Not used for JULES) ,tstar(row_length,rows) & ! OUT GBM surface temperature (K). ,tstar_land(row_length,rows) & ! OUT Land mean sfc temperature (K) ,tstar_sea(row_length,rows) & ! IN Open sea sfc temperature (K). ,tstar_sice(row_length,rows) & ! OUT Sea-ice sfc temperature (K). ,tstar_ssi(row_length,rows) & ! INOUT Sea mean sfc temperature (K). ,tstar_tile(land_pts,ntiles) & ! INOUT Surface tile temperatures ,snow_tile(land_pts,ntiles) & ! INOUT Lying snow on tiles (kg/m2) ,le_tile(land_pts,ntiles) & ! INOUT Surface latent heat flux for ! ! land tiles ,radnet_sice(row_length,rows) & ! INOUT Surface net radiation on ! ! sea-ice (W/m2) ,radnet_tile(land_pts,ntiles) & ! INOUT Surface net radiation on ! ! land tiles (W/m2) ,e_sea(row_length,rows) & ! INOUT Evaporation from sea times ! ! leads fraction. Zero over ! ! land. (kg per square metre ! ! per sec). ,fqw_1(row_length,rows) & ! INOUT Moisture flux between layers ! ! (kg per square metre per sec) ! ! FQW(,1) is total water flux ! ! from surface, 'E'. ,ftl_1(row_length,rows) & ! INOUT FTL(,K) contains net ! ! turbulent sensible heat flux ! ! into layer K from below; so ! ! FTL(,1) is the surface ! ! sensible heat, H.(W/m2) ,ftl_tile(land_pts,ntiles) & ! INOUT Surface FTL for land tiles ,h_sea(row_length,rows) & ! INOUT Surface sensible heat flux ! ! over sea times leads fraction ! ! (W/m2) ,olr(row_length,rows) & ! IN TOA - surface upward LW on ! ! last radiation timestep ! ! OUT Corrected TOA outward LW ,taux_1(row_length,rows) & ! OUT W'ly component of surface ! ! wind stress (N/sq m). (On ! ! UV-grid with first and last ! ! rows undefined or, at ! ! present, set to missing data ,taux_land(row_length,rows) & ! INOUT W'ly component of surface ! ! wind stress over land ! ! (N/sq m). (On ! ! UV-grid with first and last ! ! rows undefined or, at ! ! present, set to missing data ,taux_ssi(row_length,rows) & ! INOUT W'ly component of surface ! ! wind stress over mean sea ! ! (N/sq m). (On ! ! UV-grid with first and last ! ! rows undefined or, at ! ! present, set to missing data ,tauy_1(row_length,n_rows) & ! OUT S'ly component of surface ! ! wind stress (N/sq m). On ! ! UV-grid; comments as per TAUX ,tauy_land(row_length,n_rows) & ! INOUT S'ly component of land sfc ! ! wind stress (N/sq m). On ! ! UV-grid; comments as per TAUX ,tauy_ssi(row_length,n_rows) ! INOUT S'ly compt of mean sea sfc ! ! wind stress (N/sq m). On ! ! UV-grid; comments as per TAUX REAL, INTENT(INOUT) :: tscrndcl_ssi(row_length,rows) ! Decoupled screen-level temperature ! over sea or sea-ice REAL, INTENT(INOUT) :: tscrndcl_tile(land_pts,ntiles) ! Decoupled screen-level temperature ! over land tiles REAL, INTENT(INOUT) :: tstbtrans(row_length,rows) ! Time since the transition ! Outputs :- !-1 Diagnostic (or effectively so - includes coupled model requisites):- ! (a) Calculated anyway (use STASH space from higher level) :- ! REAL & ecan(row_length,rows) & ! OUT Gridbox mean evaporation from ! ! canopy/surface store (kg/m2/s). ! ! Zero over sea. ,esoil_tile(land_pts,ntiles) & ! OUT ESOIL for snow-free land tiles ,sea_ice_htf(row_length,rows,nice) & ! OUT Heat flux through sea-ice ! ! (W/m2, positive downwards). ! ! (Not used for JULES) ,surf_ht_flux(row_length,rows) & ! ! OUT Net downward heat flux at ! ! surface over land and sea-ice ! ! fraction of gridbox (W/m2). ,surf_ht_flux_land(row_length,rows) & ! ! OUT Net downward heat flux at ! ! surface over land ! ! fraction of gridbox (W/m2). ,surf_ht_flux_sice(row_length,rows) & ! ! OUT Net downward heat flux at ! ! surface over sea-ice ! ! fraction of gridbox (W/m2). ,surf_htf_tile(land_pts,ntiles) & ! ! OUT Net downward surface heat flux ! ! on tiles (W/m2) ,surf_ht_store(land_pts,ntiles) ! ! OUT Diagnostic to store values ! ! of C*(dT/dt) during calculation ! ! of energy balance ! (b) Not passed between lower-level routines (not in workspace at this ! level) :- REAL & sice_mlt_htf(row_length,rows,nice) & ! ! OUT Heat flux due to melting of ! ! sea-ice (Watts per sq metre). ,snomlt_surf_htf(row_length,rows) & ! ! OUT Heat flux required for surface ! ! melting of snow (W/m2). ,latent_heat(row_length,rows) & ! OUT Surface latent heat flux, +ve ! ! upwards (Watts per sq m). ,q1p5m(row_length,rows) & ! OUT Q at 1.5 m (kg water / kg air). ,q1p5m_tile(land_pts,ntiles) & ! OUT Q1P5M over land tiles. ,t1p5m(row_length,rows) & ! OUT T at 1.5 m (K). ,u10m(row_length,rows) & ! OUT U at 10 m (m per s). ,t1p5m_tile(land_pts,ntiles) & ! OUT T1P5M over land tiles. ,v10m(row_length,n_rows) ! OUT V at 10 m (m per s). !-2 Genuinely output, needed by other atmospheric routines :- REAL & ei(row_length,rows) & ! OUT Sublimation from lying snow or ! ! sea-ice (kg/m2/s). ,ei_land(row_length,rows) & ! OUT Sublimation from lying snow ! ! (kg/m2/s). ,ei_sice(row_length,rows) & ! OUT Sublimation from sea-ice ! ! (kg/m2/s). ,ei_tile(land_pts,ntiles) & ! OUT EI for land tiles. ,ecan_tile(land_pts,ntiles) & ! OUT ECAN for snow-free land tiles ,esoil(row_length,rows) & ! OUT Surface evapotranspiration ! ! from soil moisture store ! ! (kg/m2/s). ,ext(land_pts,sm_levels) & ! OUT Extraction of water from each ! ! soil layer (kg/m2/s). ,snowmelt(row_length,rows) & ! OUT Snowmelt (kg/m2/s). ,melt_tile(land_pts,ntiles) & ! OUT Snowmelt on land tiles (kg/m2/s ,surf_ht_flux_sice_ncat(row_length,rows,nice) & ! ! OUT Heat flux by ice catagory ,rhokh_mix(row_length,rows) ! OUT Exchange coeffs for moisture. & ! (Not used for JULES) INTEGER & error ! OUT 0 - AOK; ! ! 1 to 7 - bad grid definition detected; !--------------------------------------------------------------------- ! External routines called :- EXTERNAL im_sf_pt,sf_evap,sf_melt,screen_tq,sice_htf EXTERNAL timer !----------------------------------------------------------------------- ! Workspace :- REAL & elake_tile(land_pts,ntiles) & ! Lake evaporation. ,qim_1(row_length,rows) & ! Implicit value of first model level ! ! humidity ,tim_1(row_length,rows) & ! Implicit value of first model level ! ! temperature ,tstar_rad4(row_length,rows) & ! Effective surface radiative ! ! temperature for land and sea-ice ,tstar_tile_old(land_pts,ntiles) & ! ! Tile surface temperatures at ! ! beginning of timestep. ,tsurf(land_pts) & ! Soil or snow surface layer temp ,sice_melt(row_length,rows,nice) & !Melt at surface sea-ice catagory ,tstar_sic(row_length,rows,nice) & !Ice catagory surface temperature ,dftl_sice_ncat(row_length,rows) & ! Increment for ftl_ice from sea-ice ! melt calculated for each category, ! but un-weighted by category fractions ,dfqw_sice_ncat(row_length,rows) & ! Increment for fqw_ice from sea-ice ! melt calculated for each category, ! but un-weighted by category fractions ,dei_sice_ncat(row_length,rows) ! Increment for ei_sice from sea-ice ! melt calculated for each category, ! but un-weighted by category fractions REAL, ALLOCATABLE :: tstar_ssi_old(:,:) ! Sea and ice surface temperatures at ! beginning of timestep. ! dummy arrays required for sea and se-ice to create universal ! routines for all surfaces REAL & array_one(row_length*rows) & ! Array of ones ,array_one_e_six(row_length*rows) ! Array of 1.0E6 ! Local scalars :- REAL & lat_ht ! Latent heat of evaporation for snow-free land ! ! or sublimation for snow-covered land and ice. INTEGER & i,j & ! LOCAL Loop counter (horizontal field index). ,k & ! LOCAL Tile pointer ,l & ! LOCAL Land pointer ,n ! LOCAL Loop counter (tile index). INTEGER(KIND=jpim), PARAMETER :: zhook_in = 0 INTEGER(KIND=jpim), PARAMETER :: zhook_out = 1 REAL(KIND=jprb) :: zhook_handle IF (lhook) CALL dr_hook('SF_IMPL',zhook_in,zhook_handle) IF (ltimer) THEN ! DEPENDS ON: timer CALL timer('SF_IMPL ',3) END IF error = 0 array_one(:)=1.0 array_one_e_six(:)=1.0e6 ! DEPENDS ON: im_sf_pt CALL im_sf_pt ( & off_x,off_y,row_length,rows,n_rows,land_pts & ,land_index,ntiles,tile_index,tile_pts & ,flandg,tile_frac,snow_tile,ice_fract & ,GAMMA,alpha1,alpha1_sice,ashtf_prime,ashtf_prime_tile & ,resft,dtstar_tile,dtstar & ,rhokm_u_1,rhokm_v_1,rhokh_tile,rhokh_sice & ,ct_ctq_1,dqw_1,dtl_1,cq_cm_u_1,cq_cm_v_1,du_1,dv_1 & ,flandg_u,flandg_v & ,fqw_1,ftl_1 & ,taux_1,taux_land,taux_ssi,tauy_1,tauy_land,tauy_ssi & ,fqw_tile,epot_tile,ftl_tile,fqw_ice,ftl_ice,e_sea,h_sea & ,l_flux_bc,ltimer & ) !----------------------------------------------------------------------- !! 6.1 Convert FTL to sensible heat flux in Watts per square metre. !----------------------------------------------------------------------- !Cfpp$ Select(CONCUR) DO j=1,rows DO i=1,row_length ftl_1(i,j) = ftl_1(i,j)*cp END DO END DO DO j=1,rows DO i=1,row_length h_sea(i,j) = cp*h_sea(i,j) ftl_ice(i,j) = cp*ftl_ice(i,j) END DO END DO DO n=1,ntiles DO k=1,tile_pts(n) l = tile_index(k,n) ftl_tile(l,n) = cp*ftl_tile(l,n) END DO END DO !----------------------------------------------------------------------- ! Land surface calculations !----------------------------------------------------------------------- !----------------------------------------------------------------------- ! Optional error check : test for negative top soil layer temperature !----------------------------------------------------------------------- IF (l_neg_tstar) THEN DO l=1,land_pts IF (t_soil(l,1) < 0) THEN error = 1 WRITE(6,*) '*** ERROR DETECTED BY ROUTINE SF_IMPL ***' WRITE(6,*) 'NEGATIVE TEMPERATURE IN TOP SOIL LAYER AT ' WRITE(6,*) 'LAND POINT ',l END IF END DO END IF !----------------------------------------------------------------------- !! Diagnose the land surface temperature !----------------------------------------------------------------------- DO n=1,ntiles DO k=1,tile_pts(n) l = tile_index(k,n) tstar_tile_old(l,n) = tstar_tile(l,n) tstar_tile(l,n) = tstar_tile_old(l,n) + dtstar_tile(l,n) END DO END DO !----------------------------------------------------------------------- !! 7. Surface evaporation components and updating of surface !! temperature (P245, routine SF_EVAP). !----------------------------------------------------------------------- ! DEPENDS ON: sf_evap CALL sf_evap ( & row_length,rows,land_pts,ntiles, & land_index,tile_index,tile_pts,sm_levels,ltimer,fland, & ashtf_prime_tile,canopy,dtrdz_charney_grid_1,flake,fraca, & snow_tile,resfs,resft,rhokh_tile,tile_frac,smc,wt_ext_tile, & timestep,GAMMA,fqw_1,fqw_tile,ftl_1,ftl_tile,tstar_tile, & ecan,ecan_tile,elake_tile,esoil,esoil_tile,ei_tile,ext & ) !----------------------------------------------------------------------- !! Surface melting of sea-ice and snow on land tiles. !----------------------------------------------------------------------- ei_land(:,:)=0.0 snowmelt(:,:)=0.0 DO n=1,ntiles ! DEPENDS ON: sf_melt CALL sf_melt ( & row_length,rows,land_pts,land_index, & tile_index(:,n),tile_pts(n),ltimer,flandg, & alpha1(:,n),ashtf_prime_tile(:,n),dtrdz_charney_grid_1, & resft(:,n),rhokh_tile(:,n),tile_frac(:,n),timestep,GAMMA, & ei_tile(:,n),fqw_1,ftl_1,fqw_tile(:,n),ftl_tile(:,n), & tstar_tile(:,n),snow_tile(:,n),snowdep_surf(:,n), & melt_tile(:,n) & ) !----------------------------------------------------------------------- ! Increment gridbox snow sublimation and melt. !----------------------------------------------------------------------- DO k=1,tile_pts(n) l = tile_index(k,n) j=(land_index(l)-1)/row_length + 1 i = land_index(l) - (j-1)*row_length ei_land(i,j) = ei_land(i,j) + tile_frac(l,n)*ei_tile(l,n) snowmelt(i,j) = snowmelt(i,j) + tile_frac(l,n)*melt_tile(l,n) END DO END DO IF (smlt) THEN DO j=1,rows DO i=1,row_length snomlt_surf_htf(i,j) = lf*snowmelt(i,j) END DO END DO END IF DO j=1,rows DO i=1,row_length surf_ht_flux_land(i,j) = 0. END DO END DO DO l=1,land_pts j=(land_index(l)-1)/row_length + 1 i = land_index(l) - (j-1)*row_length tstar_land(i,j) = 0. END DO IF (l_skyview) THEN DO n=1,ntiles DO k=1,tile_pts(n) l = tile_index(k,n) j=(land_index(l)-1)/row_length + 1 i = land_index(l) - (j-1)*row_length radnet_tile(l,n) = sw_tile(l,n) + emis_tile(l,n)* & sky(i,j)*( lw_down(i,j) - sbcon*tstar_tile(l,n)**4 ) END DO END DO ELSE DO n=1,ntiles DO k=1,tile_pts(n) l = tile_index(k,n) j=(land_index(l)-1)/row_length + 1 i = land_index(l) - (j-1)*row_length radnet_tile(l,n) = sw_tile(l,n) + emis_tile(l,n)* & ( lw_down(i,j) - sbcon*tstar_tile(l,n)**4 ) END DO END DO END IF DO n=1,ntiles DO k=1,tile_pts(n) l = tile_index(k,n) j=(land_index(l)-1)/row_length + 1 i = land_index(l) - (j-1)*row_length le_tile(l,n) = lc*ecan_tile(l,n) + lc*esoil_tile(l,n) + & lc*elake_tile(l,n) + ls*ei_tile(l,n) surf_ht_store(l,n) = (canhc_tile(l,n)/timestep) * & (tstar_tile(l,n) - tstar_tile_old(l,n)) surf_htf_tile(l,n) = radnet_tile(l,n) + anthrop_heat(l,n) - & ftl_tile(l,n) - & le_tile(l,n) - lf*melt_tile(l,n) - & surf_ht_store(l,n) surf_ht_flux_land(i,j) = surf_ht_flux_land(i,j) & + tile_frac(l,n) * surf_htf_tile(l,n) tstar_land(i,j) = tstar_land(i,j) & + tile_frac(l,n)*tstar_tile(l,n) END DO END DO !----------------------------------------------------------------------- ! Optional error check : test for negative surface temperature !----------------------------------------------------------------------- IF (l_neg_tstar) THEN DO l=1,land_pts j=(land_index(l)-1)/row_length + 1 i = land_index(l) - (j-1)*row_length IF (tstar_land(i,j) < 0) THEN error = 1 WRITE(6,*) '*** ERROR DETECTED BY ROUTINE SF_IMPL ***' WRITE(6,*) 'NEGATIVE SURFACE TEMPERATURE AT LAND POINT ',l END IF END DO END IF !----------------------------------------------------------------------- ! Sea and sea-ice surface calculations !----------------------------------------------------------------------- tstar_sic(:,:,:)= 0.0 surf_ht_flux_sice(:,:)=0.0 sice_melt(:,:,:)=0.0 ei_sice(:,:)=fqw_ice(:,:) !----------------------------------------------------------------------- ! Store old surface temperature for sea and sea-ice if using the ! decoupled diagnostic. !----------------------------------------------------------------------- IF (iscrntdiag == ip_scrndecpl2) THEN ALLOCATE(tstar_ssi_old(row_length,rows)) tstar_ssi_old(:,:) = tstar_ssi(:,:) ELSE ALLOCATE(tstar_ssi_old(row_length,rows)) END IF !----------------------------------------------------------------------- ! Diagnose the surface temperature for points with sea-ice !----------------------------------------------------------------------- DO j=1,rows DO i=1,row_length IF ( flandg(i,j) < 1.0 .AND. ice_fract(i,j) > 0. ) THEN surf_ht_flux_sice(i,j) = radnet_sice(i,j) - & 4.0*sbcon*(tstar_sice(i,j)**3.0)*dtstar(i,j) - & ftl_ice(i,j) - ls*fqw_ice(i,j) DO n=1,nice tstar_sic(i,j,n) = ti(i,j,n) + & surf_ht_flux_sice(i,j)/(2.0*kappai/de) END DO END IF END DO END DO DO n=1,nice ! Since sea-ice categories are not actually tiled for their surface ! fluxes at present, then the increment to ftl_ice, fqw_ice and ! ei_sice are not correctly weighted in sf_melt. Hence need to keep ! the increments and update ftl_ice, fqw_ice and ei_sice with ! weighted contributions below dftl_sice_ncat(:,:)=0.0 dfqw_sice_ncat(:,:)=0.0 dei_sice_ncat(:,:)=0.0 sice_mlt_htf(:,:,:)=0.0 ! DEPENDS ON: sf_melt CALL sf_melt ( & row_length,rows,ssi_pts,ssi_index, & sice_index_ncat(:,n),sice_pts_ncat(n),ltimer,fssi, & alpha1_sice,ashtf_prime,dtrdz_charney_grid_1, & array_one,rhokh_sice,sice_frac_ncat(:,n),timestep,GAMMA, & dei_sice_ncat,fqw_1,ftl_1,dfqw_sice_ncat,dftl_sice_ncat, & tstar_sic(:,:,n),array_one_e_six, & array_one_e_six/rho_snow_const, & sice_melt(:,:,n) & ) DO k=1,sice_pts_ncat(n) l = sice_index_ncat(k,n) j=(ssi_index(l)-1)/row_length + 1 i = ssi_index(l) - (j-1)*row_length IF (simlt) sice_mlt_htf(i,j,n) = lf * sice_melt(i,j,n) ! Add weighted increments to ftl_ice, fqw_ice and ei_sice ftl_ice(i,j)=ftl_ice(i,j) & +( sice_frac_ncat(l,n)/sice_frac(l) )*dftl_sice_ncat(i,j) fqw_ice(i,j)=fqw_ice(i,j) & +( sice_frac_ncat(l,n)/sice_frac(l) )*dfqw_sice_ncat(i,j) ei_sice(i,j)=ei_sice(i,j) & +( sice_frac_ncat(l,n)/sice_frac(l) )*dei_sice_ncat(i,j) END DO END DO !----------------------------------------------------------------------- ! Gridbox-mean surface temperature and net surface heat fluxes !----------------------------------------------------------------------- DO j=1,rows DO i=1,row_length surf_ht_flux_sice(i,j) = 0.0 DO n=1,nice surf_ht_flux_sice_ncat(i,j,n)=0.0 END DO IF (flandg(i,j) < 1.0 .AND. ice_fract(i,j) > 0.0) THEN tstar_sice(i,j)= 0.0 DO n=1,nice tstar_sice(i,j) = tstar_sice(i,j) + & (ice_fract_ncat(i,j,n)/ & ice_fract(i,j)) * tstar_sic(i,j,n) END DO tstar_ssi(i,j)=(1.-ice_fract(i,j))*tstar_sea(i,j) & +ice_fract(i,j)*tstar_sice(i,j) radnet_sice(i,j) = rad_sice(i,j) - sbcon*tstar_sice(i,j)**4 DO n=1,nice surf_ht_flux_sice_ncat(i,j,n) = radnet_sice(i,j) - & 4.0*sbcon*tstar_sice(i,j)**3 * & (tstar_sic(i,j,n)-tstar_sice(i,j)) - & ftl_ice(i,j) - ls*fqw_ice(i,j) - & lf*sice_melt(i,j,n) surf_ht_flux_sice(i,j) = surf_ht_flux_sice(i,j) + & (ice_fract_ncat(i,j,n)/ice_fract(i,j))* & surf_ht_flux_sice_ncat(i,j,n) END DO END IF END DO END DO ! Convert sea and sea-ice fluxes to be fraction of grid-box ! (as required by sea and sea-ice modellers) DO i=1,row_length DO j=1,rows h_sea(i,j)=(1.0-ice_fract(i,j))*h_sea(i,j) e_sea(i,j)=(1.0-ice_fract(i,j))*e_sea(i,j) ftl_ice(i,j)=ice_fract(i,j)*ftl_ice(i,j) fqw_ice(i,j)=ice_fract(i,j)*fqw_ice(i,j) ei_sice(i,j)=ice_fract(i,j)*ei_sice(i,j) rad_sice(i,j)=ice_fract(i,j)*rad_sice(i,j) radnet_sice(i,j)=ice_fract(i,j)*radnet_sice(i,j) surf_ht_flux_sice(i,j)=ice_fract(i,j)*surf_ht_flux_sice(i,j) END DO END DO !----------------------------------------------------------------------- ! GBM diagnostic calculations !----------------------------------------------------------------------- DO j=1,rows DO i=1,row_length qim_1(i,j)=qw_1(i,j) + dqw_1(i,j)-ct_ctq_1(i,j)*fqw_1(i,j) tim_1(i,j)=tl_1(i,j) + dtl_1(i,j)-ct_ctq_1(i,j)*ftl_1(i,j)/cp END DO END DO DO j=1,rows DO i=1,row_length tstar(i,j)=flandg(i,j)*tstar_land(i,j) & +(1.-flandg(i,j))*tstar_ssi(i,j) ei(i,j)=flandg(i,j)*ei_land(i,j) & +(1.-flandg(i,j))*ei_sice(i,j) surf_ht_flux(i,j)=flandg(i,j)*surf_ht_flux_land(i,j) & +(1.-flandg(i,j))*surf_ht_flux_sice(i,j) END DO END DO ! TOA outward LW radiation after boundary layer tstar_rad4(:,:)=0.0 DO j=1,rows DO i=1,row_length tstar_rad4(i,j) = tstar_rad4(i,j) + (1.0-flandg(i,j))* & ( (1.0-ice_fract(i,j))*tstar_sea(i,j)**4 + & ice_fract(i,j)*tstar_sice(i,j)**4 ) END DO END DO DO n=1,ntiles DO k=1,tile_pts(n) l = tile_index(k,n) j=(land_index(l)-1)/row_length + 1 i = land_index(l) - (j-1)*row_length tstar_rad4(i,j) = tstar_rad4(i,j) + flandg(i,j)* & tile_frac(l,n)*tstar_tile(l,n)**4 END DO END DO DO j=1,rows DO i=1,row_length olr(i,j) = olr(i,j) + sbcon*tstar_rad4(i,j) END DO END DO !----------------------------------------------------------------------- !! Specific humidity and temperature at 1.5 metres. !----------------------------------------------------------------------- ! DEPENDS ON: screen_tq CALL screen_tq ( & row_length,rows,land_pts,ntiles, & land_index,tile_index,tile_pts,flandg, & sq1p5,st1p5,chr1p5m,chr1p5m_sice,pstar,qim_1,resft, & tile_frac,tim_1,tstar_ssi,tstar_tile, & z0hssi,z0h_tile,z0mssi,z0m_tile,z1, & timestep,tstar_ssi_old,tstar_tile_old, & l_co2_interactive, co2_mmr, co2_3d, & f3_at_p, ustargbm, rho1, & tscrndcl_ssi,tscrndcl_tile,tstbtrans, & q1p5m,q1p5m_tile,t1p5m,t1p5m_tile, & lq_mix_bl & ) ! Release space allocated for the transitional diagnostic. DEALLOCATE(tstar_ssi_old) !---------------------------------------------------------------------- !! 8.1 Update U_V. !---------------------------------------------------------------------- ! U component of 10m wind IF (su10)THEN DO j=1,rows DO i=1,row_length u10m(i,j) = (u_1(i,j) + (du_1(i,j) - & cq_cm_u_1(i,j)*taux_1(i,j)) - & u_0(i,j))*cdr10m_u(i,j) + u_0(i,j) END DO END DO END IF ! V component of 10m wind IF (sv10)THEN DO j=1,n_rows DO i=1,row_length v10m(i,j) = (v_1(i,j) + (dv_1(i,j) - & cq_cm_v_1(i,j)*tauy_1(i,j)) - & v_0(i,j))*cdr10m_v(i,j) + v_0(i,j) END DO END DO END IF !----------------------------------------------------------------------- !! 9. Calculate surface latent heat flux. !----------------------------------------------------------------------- IF (slh) THEN DO j=1,rows DO i=1,row_length latent_heat(i,j) = lc*fqw_1(i,j) & + lf*(flandg(i,j)*ei_land(i,j)+(1.-flandg(i,j))*ei_sice(i,j)) END DO END DO END IF IF (ltimer) THEN ! DEPENDS ON: timer CALL timer('SF_IMPL ',4) END IF IF (lhook) CALL dr_hook('SF_IMPL',zhook_out,zhook_handle) RETURN END SUBROUTINE sf_impl #endif