!======================================================================= ! global 4x4 deg model with 15 levels !======================================================================= module config_module ! use this module only locally in this file implicit none real*8, allocatable :: t_star(:,:,:) real*8, allocatable :: s_star(:,:,:) real*8, allocatable :: qnec(:,:,:) real*8, allocatable :: qnet(:,:,:) real*8, allocatable :: taux(:,:,:) real*8, allocatable :: tauy(:,:,:) end module config_module subroutine set_parameter ! ---------------------------------- ! set here main parameter ! ---------------------------------- use main_module use config_module use eke_module use tke_module use idemix_module use isoneutral_module use diagnostics_module implicit none nx = 90 ny = 40 nz = 15 dt_mom = 1800.0 dt_tracer = 86400.!dt_mom coord_degree = .true. enable_cyclic_x = .true. runlen = 365*86400*100. ! runlen = 365*86400/12.0 enable_diag_ts_monitor = .true.; ts_monint = 365*86400./24. enable_diag_snapshots = .true.; snapint = 365*86400. /24.0 enable_diag_overturning= .true.; overint = 365*86400./24.0; overfreq = dt_tracer enable_diag_energy = .true.; energint = 365*86400./24. energfreq = 86400 enable_diag_averages = .true. aveint = 365*86400.*10 avefreq = 86400 congr_epsilon = 1e-8 congr_max_iterations = 20000 enable_streamfunction = .true. ! enable_congrad_verbose = .true. enable_neutral_diffusion = .true.; K_iso_0 = 1000.0 K_iso_steep = 1000.0 iso_dslope=4./1000.0 iso_slopec=1./1000.0 enable_skew_diffusion = .true. enable_hor_friction = .true.; A_h = (4*degtom)**3*2e-11 enable_hor_friction_cos_scaling = .true.; hor_friction_cosPower=1 enable_implicit_vert_friction = .true. enable_tke = .true. c_k = 0.1 c_eps = 0.7 alpha_tke = 30.0 mxl_min = 1d-8 tke_mxl_choice = 2 enable_tke_superbee_advection = .true. enable_eke = .true. eke_k_max = 1e4 eke_c_k = 0.4 eke_c_eps = 0.5 eke_cross = 2. eke_crhin = 1.0 eke_lmin = 100.0 enable_eke_superbee_advection = .true. enable_idemix = .true. enable_idemix_hor_diffusion = .true.; enable_eke_diss_surfbot = .true. eke_diss_surfbot_frac = 0.2 ! fraction which goes into bottom enable_idemix_superbee_advection = .true. eq_of_state_type = 5 end subroutine set_parameter subroutine set_grid use main_module use config_module implicit none real*8 :: ddz(nz) ddz = (/50.,70.,100.,140.,190.,240.,290.,340.,390.,440.,490.,540.,590.,640.,690./) dzt=ddz(nz:1:-1) dxt = 4.0 dyt = 4.0 y_origin = -76.0 x_origin = 4.0 end subroutine set_grid subroutine set_coriolis use main_module use config_module implicit none integer :: j do j=js_pe-onx,je_pe+onx coriolis_t(:,j) = 2*omega*sin( yt(j)/180.*pi ) enddo end subroutine set_coriolis subroutine set_topography use main_module implicit none integer :: i,j,k,kk real*4 :: lev_salt(nx,ny,nz),bathy(nx,ny) kbot=0 open(10,file='bathymetry.bin',access='direct',recl=4*nx*ny,status='old') read(10,rec=1) bathy close(10) open(10,file='lev_s.bin',access='direct',recl=4*nx*ny,status='old') kk=nz do k=1,nz read(10,rec=kk) lev_salt(:,:,k) kk=kk-1 enddo close(10) do i=is_pe,ie_pe do j=js_pe,je_pe do k=nz,1,-1 if (lev_salt(i,j,k) .ne. 0.0 ) kbot(i,j)=k enddo if (bathy(i,j) == 0.0) kbot(i,j) =0 enddo enddo where ( kbot == nz) kbot = 0 !where (bathy == 0.0) kbot(1:nx,1:ny) =0 end subroutine set_topography subroutine set_initial_conditions use main_module use config_module use eke_module use tke_module use idemix_module implicit none integer :: i,j,k,kk,n real*4 :: dat4(nx,ny) include "netcdf.inc" integer :: iret, ncid,id real*8 :: fxa,fxb allocate( s_star(is_pe-onx:ie_pe+onx,js_pe-onx:je_pe+onx,12) ); s_star=0 allocate( t_star(is_pe-onx:ie_pe+onx,js_pe-onx:je_pe+onx,12) ); t_star=0 allocate( qnec(is_pe-onx:ie_pe+onx,js_pe-onx:je_pe+onx,12) ) ; qnec=0 allocate( qnet(is_pe-onx:ie_pe+onx,js_pe-onx:je_pe+onx,12) ); qnet=0 allocate( taux(is_pe-onx:ie_pe+onx,js_pe-onx:je_pe+onx,12) ); taux=0 allocate( tauy(is_pe-onx:ie_pe+onx,js_pe-onx:je_pe+onx,12) ); tauy=0 iret=nf_open('ecmwf_4deg_monthly.cdf',NF_NOWRITE,ncid) ! ECMWF monthly heat flux forcing !iret=nf_open('ecmwf_4deg.cdf',NF_NOWRITE,ncid) ! annual mean if (iret /=0 ) then; print*,nf_strerror(iret) ; stop; endif iret=nf_inq_varid(ncid,'Q3',id) iret= nf_get_vara_double(ncid,id,(/is_pe,js_pe,1/), (/ie_pe-is_pe+1,je_pe-js_pe+1,12/),qnec(is_pe:ie_pe,js_pe:je_pe,1:12)) iret = nf_close (ncid) do n=1,12 qnec(:,:,n)=qnec(:,:,n)*maskT(:,:,nz) enddo ! use NCEP net heat flux instead of ECMWF open(10,file='ncep_qnet.bin',access='direct',recl=4*nx*ny,status='old') do n=1,12 read(10,rec=n) dat4 qnet(is_pe:ie_pe,js_pe:je_pe,n) = - dat4(is_pe:ie_pe,js_pe:je_pe)*maskT(is_pe:ie_pe,js_pe:je_pe,nz) enddo close(10) fxa = 0.; fxb = 0. do n=1,12 do i=is_pe,ie_pe do j=js_pe,je_pe fxa = fxa + qnet(i,j,n)*area_t(i,j) fxb = fxb + area_t(i,j) enddo enddo enddo call global_sum(fxa); call global_sum(fxb) if (my_pe==0) print*,' removing a heat flux imbalance of ',fxa/fxb,'W/m^2' do n=1,12 qnet(:,:,n) = (qnet(:,:,n) - fxa/fxb)*maskT(:,:,nz) enddo ! use Trenberth wind stress from MITgcm instead of ECMWF (also contained in ecmwf_4deg.cdf) open(10,file='trenberth_taux.bin',access='direct',recl=4*nx*ny,status='old') open(20,file='trenberth_tauy.bin',access='direct',recl=4*nx*ny,status='old') do n=1,12 read(10,rec=n) dat4 taux(is_pe:ie_pe,js_pe:je_pe,n) = dat4(is_pe:ie_pe,js_pe:je_pe)/rho_0 read(20,rec=n) dat4 tauy(is_pe:ie_pe,js_pe:je_pe,n) = dat4(is_pe:ie_pe,js_pe:je_pe)/rho_0 call border_exchg_xy(is_pe-onx,ie_pe+onx,js_pe-onx,je_pe+onx,taux(:,:,n)) call setcyclic_xy (is_pe-onx,ie_pe+onx,js_pe-onx,je_pe+onx,taux(:,:,n)) call border_exchg_xy(is_pe-onx,ie_pe+onx,js_pe-onx,je_pe+onx,tauy(:,:,n)) call setcyclic_xy (is_pe-onx,ie_pe+onx,js_pe-onx,je_pe+onx,tauy(:,:,n)) enddo close(10); close(20) ! check for special values where( taux < -99.9) taux = 0 where( tauy < -99.9) tauy = 0 ! initial conditions for T and S open(10,file='lev_t.bin',access='direct',recl=4*nx*ny,status='old') open(20,file='lev_s.bin',access='direct',recl=4*nx*ny,status='old') kk=nz do k=1,nz read(10,rec=kk) dat4 temp(is_pe:ie_pe,js_pe:je_pe,k,tau )= dat4(is_pe:ie_pe,js_pe:je_pe)*maskT(is_pe:ie_pe,js_pe:je_pe,k) temp(is_pe:ie_pe,js_pe:je_pe,k,taum1)= dat4(is_pe:ie_pe,js_pe:je_pe)*maskT(is_pe:ie_pe,js_pe:je_pe,k) read(20,rec=kk) dat4 salt(is_pe:ie_pe,js_pe:je_pe,k,tau )= dat4(is_pe:ie_pe,js_pe:je_pe)*maskT(is_pe:ie_pe,js_pe:je_pe,k) salt(is_pe:ie_pe,js_pe:je_pe,k,taum1)= dat4(is_pe:ie_pe,js_pe:je_pe)*maskT(is_pe:ie_pe,js_pe:je_pe,k) kk=kk-1 enddo close(10); close(20) ! SST and SSS open(10,file='lev_sst.bin',access='direct',recl=4*nx*ny,status='old') open(20,file='lev_sss.bin',access='direct',recl=4*nx*ny,status='old') do n=1,12 read(10,rec=n) dat4 t_star(is_pe:ie_pe,js_pe:je_pe,n) = dat4(is_pe:ie_pe,js_pe:je_pe)*maskT(is_pe:ie_pe,js_pe:je_pe,nz) read(20,rec=n) dat4 s_star(is_pe:ie_pe,js_pe:je_pe,n) = dat4(is_pe:ie_pe,js_pe:je_pe)*maskT(is_pe:ie_pe,js_pe:je_pe,nz) enddo close(10); close(20) if (enable_idemix ) then open(10,file='tidal_energy.bin',access='direct',recl=4*nx*ny,status='old') read(10,rec=1) dat4 close(10) do j=js_pe,je_pe do i=is_pe,ie_pe k=max(1,kbot(i,j)) forc_iw_bottom(i,j) = dat4(i,j)*maskW(i,j,k)/rho_0 enddo enddo open(10,file='wind_energy.bin',access='direct',recl=4*nx*ny,status='old') read(10,rec=1) dat4 close(10) do j=js_pe,je_pe do i=is_pe,ie_pe forc_iw_surface(i,j) = dat4(i,j)*maskW(i,j,nz)/rho_0*0.2 enddo enddo endif end subroutine set_initial_conditions subroutine get_periodic_interval(currentTime,cycleLength,recSpacing,nbrec,trec1,trec2,wght1,wght2) ! interpolation routine taken from mitgcm implicit none real*8, intent(in) :: currentTime,recSpacing,cycleLength integer, intent(in) :: nbrec real*8, intent(out) :: wght1,wght2 integer, intent(out) :: tRec1,tRec2 real*8 :: locTime,tmpTime locTime = currentTime - recSpacing*0.5 + cycleLength*( 2 - NINT(currentTime/cycleLength) ) tmpTime = MOD( locTime, cycleLength ) tRec1 = 1 + INT( tmpTime/recSpacing ) tRec2 = 1 + MOD( tRec1, nbRec ) wght2 = ( tmpTime - recSpacing*(tRec1 - 1) )/recSpacing wght1 = 1d0 - wght2 end subroutine subroutine set_forcing use main_module use config_module use eke_module use tke_module use idemix_module implicit none integer :: i,j,n1,n2 real*8 :: t_rest= 30*86400, cp_0 = 3991.86795711963 ! J/kg /K real*8 :: fxa,qqnet,qqnec,f1,f2 fxa = 365*86400d0 call get_periodic_interval((itt-1)*dt_tracer,fxa,fxa/12.,12,n1,n2,f1,f2) ! linearly interpolate wind stress and shift from MITgcm U/V grid to this grid do j=js_pe-onx,je_pe+onx-1 do i=is_pe-onx,ie_pe+onx-1 surface_taux(i,j) = f1*taux(i+1,j,n1) + f2*taux(i+1,j,n2) surface_tauy(i,j) = f1*tauy(i,j+1,n1) + f2*tauy(i,j+1,n2) enddo enddo if (enable_tke ) then do j=js_pe-onx+1,je_pe+onx do i=is_pe-onx+1,ie_pe+onx forc_tke_surface(i,j) = sqrt( (0.5*(surface_taux(i,j)+surface_taux(i-1,j)))**2 & +(0.5*(surface_tauy(i,j)+surface_tauy(i,j-1)))**2 )**(3./2.) enddo enddo endif ! W/m^2 K kg/J m^3/kg = K m/s do j=js_pe,je_pe do i=is_pe,ie_pe fxa = f1*t_star(i,j,n1)+f2*t_star(i,j,n2) qqnec = f1*qnec(i,j,n1)+f2*qnec(i,j,n2) qqnet = f1*qnet(i,j,n1)+f2*qnet(i,j,n2) forc_temp_surface(i,j)=(qqnet+ qqnec*(fxa -temp(i,j,nz,tau)) )*maskT(i,j,nz)/cp_0/rho_0 fxa = f1*s_star(i,j,n1)+f2*s_star(i,j,n2) forc_salt_surface(i,j)=dzt(nz)/t_rest*(fxa-salt(i,j,nz,tau))*maskT(i,j,nz) enddo enddo ! apply simple ice mask do j=js_pe,je_pe do i=is_pe,ie_pe if (temp(i,j,nz,tau)*maskT(i,j,nz) <= -1.8 .and. forc_temp_surface(i,j) <=0 ) then forc_temp_surface(i,j) = 0.0 forc_salt_surface(i,j) = 0.0 endif enddo enddo end subroutine set_forcing subroutine set_diagnostics use main_module use eke_module use tke_module use idemix_module use isoneutral_module implicit none call register_average('taux','Zonal wind stress','m^2/s','UT',surface_taux,0D0,.false.) call register_average('tauy','Meridional wind stress','m^2/s','TU',surface_tauy,0D0,.false.) call register_average('forc_temp_surface','Surface temperature flux','m K/s','TT',forc_temp_surface,0D0,.false.) call register_average('forc_salt_surface','Surface salinity flux','m g/s kg','TT',forc_salt_surface,0D0,.false.) if (enable_streamfunction) then call register_average('psi','Barotropic streamfunction','m^2/s','UU',psi(:,:,tau),0D0,.false.) else call register_average('psi','Surface pressure','m^2/s','TT',psi(:,:,tau),0D0,.false.) endif call register_average('temp','Temperature','deg C','TTT',0d0,temp(:,:,:,tau),.true.) call register_average('salt','Salinity','g/kg','TTT',0d0,salt(:,:,:,tau),.true.) call register_average('u','Zonal velocity','m/s','UTT',0d0,u(:,:,:,tau),.true.) call register_average('v','Meridional velocity','m/s','TUT',0d0,v(:,:,:,tau),.true.) call register_average('w','Vertical velocity','m/s','TTU',0d0,w(:,:,:,tau),.true.) call register_average('kappaH','Vertical diffusivity','m^2/s','TTU',0d0,kappaH,.true.) if (enable_skew_diffusion) then call register_average('B1_gm','Zonal component of GM streamfct.','m^2/s','TUT',0d0,B1_gm,.true.) call register_average('B2_gm','Meridional component of GM streamfct.','m^2/s','UTT',0d0,B2_gm,.true.) endif if (enable_tke) then call register_average('TKE','Turbulent kinetic energy','m^2/s^2','TTU',0d0,tke(:,:,:,tau),.true.) call register_average('Prandtl','Prandtl number',' ','TTU',0d0,Prandtlnumber,.true.) call register_average('mxl','Mixing length',' ','TTU',0d0,mxl,.true.) call register_average('tke_diss','Dissipation of TKE','m^2/s^3','TTU',0d0,tke_diss,.true.) call register_average('forc_tke_surface','TKE surface forcing','m^3/s^2','TT',forc_tke_surface,0D0,.false.) call register_average('tke_surface_corr','TKE surface flux correction','m^3/s^2','TT',tke_surf_corr,0D0,.false.) endif if (enable_idemix) then call register_average('E_iw','Internal wave energy','m^2/s^2','TTU',0d0,e_iw(:,:,:,tau),.true.) call register_average('forc_iw_surface','IW surface forcing','m^3/s^2','TT',forc_iw_surface,0D0,.false.) call register_average('forc_iw_bottom','IW bottom forcing','m^3/s^2','TT',forc_iw_bottom,0D0,.false.) call register_average('iw_diss','Dissipation of E_iw','m^2/s^3','TTU',0d0,iw_diss,.true.) endif if (enable_eke) then call register_average('EKE','Eddy energy','m^2/s^2','TTU',0d0,eke(:,:,:,tau),.true.) call register_average('K_gm','Lateral diffusivity','m^2/s','TTU',0d0,K_gm,.true.) call register_average('eke_diss_tke','Eddy energy dissipation','m^2/s^3','TTU',0d0,eke_diss_tke,.true.) call register_average('eke_diss_iw','Eddy energy dissipation','m^2/s^3','TTU',0d0,eke_diss_iw,.true.) endif end subroutine set_diagnostics subroutine set_particles end subroutine set_particles