MODULE crsini !!====================================================================== !! *** MODULE crsini *** !! Manage the grid coarsening module initialization !!====================================================================== !! History 2012-05 (J. Simeon, G. Madec, C. Ethe, C. Calone) Original code !!---------------------------------------------------------------------- !!---------------------------------------------------------------------- !! crs_init : !!---------------------------------------------------------------------- USE par_kind, ONLY: wp USE par_oce ! For parameter jpi,jpj USE dom_oce ! For parameters in par_oce USE crs ! Coarse grid domain USE phycst, ONLY: omega, rad ! physical constants USE crsdom USE crsdomwri USE crslbclnk ! USE iom USE in_out_manager USE lib_mpp IMPLICIT NONE PRIVATE PUBLIC crs_init ! called by nemogcm.F90 module !!---------------------------------------------------------------------- !! NEMO/OCE 4.0 , NEMO Consortium (2018) !! $Id$ !! Software governed by the CeCILL license (see ./LICENSE) !!---------------------------------------------------------------------- CONTAINS SUBROUTINE crs_init !!------------------------------------------------------------------- !! *** SUBROUTINE crs_init !! ** Purpose : Initialization of the grid coarsening module !! 1. Read namelist !! X2. MOVE TO crs_dom.F90 Set the domain definitions for coarse grid !! a. Define the coarse grid starting/ending indices on parent grid !! Here is where the T-pivot or F-pivot grids are discerned !! b. TODO. Include option for north-centric or equator-centric binning. !! (centered only for odd reduction factors; even reduction bins bias equator to the south) !! 3. Mask and mesh creation. => calls to crsfun !! a. Use crsfun_mask to generate tmask,umask, vmask, fmask. !! b. Use crsfun_coordinates to get coordinates !! c. Use crsfun_UV to get horizontal scale factors !! d. Use crsfun_TW to get initial vertical scale factors !! 4. Volumes and weights jes.... TODO. Updates for vvl? Where to do this? crsstp.F90? !! a. Calculate initial coarse grid box volumes: pvol_T, pvol_W !! b. Calculate initial coarse grid surface-averaging weights !! c. Calculate initial coarse grid volume-averaging weights !! !! X5. MOVE TO crs_dom_wri.F90 Using iom_rstput output the initial meshmask. !! ?. Another set of "masks" to generate !! are the u- and v- surface areas for U- and V- area-weighted means. !! Need to put this somewhere in section 3? !! jes. What do to about the vvl? GM. could separate the weighting (denominator), so !! output C*dA or C*dV as summation not mran, then do mean (division) at moment of output. !! As is, crsfun takes into account vvl. !! Talked about pre-setting the surface array to avoid IF/ENDIF and division. !! But have then to make that preset array here and elsewhere. !! that is called every timestep... !! !! - Read in pertinent data ? !!------------------------------------------------------------------- INTEGER :: ji,jj,jk ! dummy indices INTEGER :: ierr ! allocation error status INTEGER :: ios ! Local integer output status for namelist read REAL(wp), DIMENSION(jpi,jpj,jpk) :: ze3t, ze3u, ze3v, ze3w NAMELIST/namcrs/ nn_factx, nn_facty, nn_binref, ln_msh_crs, nn_crs_kz, ln_crs_wn !!---------------------------------------------------------------------- ! !--------------------------------------------------------- ! 1. Read Namelist file !--------------------------------------------------------- ! REWIND( numnam_ref ) ! Namelist namrun in reference namelist : Parameters of the run READ ( numnam_ref, namcrs, IOSTAT = ios, ERR = 901) 901 IF( ios /= 0 ) CALL ctl_nam ( ios , 'namcrs in reference namelist', lwp ) REWIND( numnam_cfg ) ! Namelist namrun in configuration namelist : Parameters of the run READ ( numnam_cfg, namcrs, IOSTAT = ios, ERR = 902 ) 902 IF( ios > 0 ) CALL ctl_nam ( ios , 'namcrs in configuration namelist', lwp ) IF(lwm) WRITE ( numond, namcrs ) IF(lwp) THEN WRITE(numout,*) WRITE(numout,*) 'crs_init : Initializing the grid coarsening module' WRITE(numout,*) '~~~~~~~~' WRITE(numout,*) ' Namelist namcrs ' WRITE(numout,*) ' coarsening factor in i-direction nn_factx = ', nn_factx WRITE(numout,*) ' coarsening factor in j-direction nn_facty = ', nn_facty WRITE(numout,*) ' bin centering preference nn_binref = ', nn_binref WRITE(numout,*) ' create a mesh file (=T) ln_msh_crs = ', ln_msh_crs WRITE(numout,*) ' type of Kz coarsening (0,1,2) nn_crs_kz = ', nn_crs_kz WRITE(numout,*) ' wn coarsened or computed using hdivn ln_crs_wn = ', ln_crs_wn ENDIF rfactx_r = 1. / nn_factx rfacty_r = 1. / nn_facty !--------------------------------------------------------- ! 2. Define Global Dimensions of the coarsened grid !--------------------------------------------------------- CALL crs_dom_def !--------------------------------------------------------- ! 3. Mask and Mesh !--------------------------------------------------------- ! Set up the masks and meshes ! 3.a. Get the masks CALL crs_dom_msk ! 3.b. Get the coordinates ! Odd-numbered reduction factor, center coordinate on T-cell ! Even-numbered reduction factor, center coordinate on U-,V- faces or f-corner. ! IF ( nresty /= 0 .AND. nrestx /= 0 ) THEN CALL crs_dom_coordinates( gphit, glamt, 'T', gphit_crs, glamt_crs ) CALL crs_dom_coordinates( gphiu, glamu, 'U', gphiu_crs, glamu_crs ) CALL crs_dom_coordinates( gphiv, glamv, 'V', gphiv_crs, glamv_crs ) CALL crs_dom_coordinates( gphif, glamf, 'F', gphif_crs, glamf_crs ) ELSEIF ( nresty /= 0 .AND. nrestx == 0 ) THEN CALL crs_dom_coordinates( gphiu, glamu, 'T', gphit_crs, glamt_crs ) CALL crs_dom_coordinates( gphiu, glamu, 'U', gphiu_crs, glamu_crs ) CALL crs_dom_coordinates( gphif, glamf, 'V', gphiv_crs, glamv_crs ) CALL crs_dom_coordinates( gphif, glamf, 'F', gphif_crs, glamf_crs ) ELSEIF ( nresty == 0 .AND. nrestx /= 0 ) THEN CALL crs_dom_coordinates( gphiv, glamv, 'T', gphit_crs, glamt_crs ) CALL crs_dom_coordinates( gphif, glamf, 'U', gphiu_crs, glamu_crs ) CALL crs_dom_coordinates( gphiv, glamv, 'V', gphiv_crs, glamv_crs ) CALL crs_dom_coordinates( gphif, glamf, 'F', gphif_crs, glamf_crs ) ELSE CALL crs_dom_coordinates( gphif, glamf, 'T', gphit_crs, glamt_crs ) CALL crs_dom_coordinates( gphif, glamf, 'U', gphiu_crs, glamu_crs ) CALL crs_dom_coordinates( gphif, glamf, 'V', gphiv_crs, glamv_crs ) CALL crs_dom_coordinates( gphif, glamf, 'F', gphif_crs, glamf_crs ) ENDIF ! 3.c. Get the horizontal mesh ! 3.c.1 Horizontal scale factors CALL crs_dom_hgr( e1t, e2t, 'T', e1t_crs, e2t_crs ) CALL crs_dom_hgr( e1u, e2u, 'U', e1u_crs, e2u_crs ) CALL crs_dom_hgr( e1v, e2v, 'V', e1v_crs, e2v_crs ) CALL crs_dom_hgr( e1f, e2f, 'F', e1f_crs, e2f_crs ) e1e2t_crs(:,:) = e1t_crs(:,:) * e2t_crs(:,:) ! 3.c.2 Coriolis factor !!gm Not sure CRS needs Coriolis parameter.... !!gm If needed, then update this to have Coriolis at both f- and t-points ff_crs(:,:) = 2. * omega * SIN( rad * gphif_crs(:,:) ) CALL ctl_warn( 'crsini: CAUTION, CRS only designed for Coriolis defined on the sphere' ) ! 3.d.1 mbathy ( vertical k-levels of bathymetry ) CALL crs_dom_bat ! ze3t(:,:,:) = e3t_n(:,:,:) ze3u(:,:,:) = e3u_n(:,:,:) ze3v(:,:,:) = e3v_n(:,:,:) ze3w(:,:,:) = e3w_n(:,:,:) ! 3.d.2 Surfaces CALL crs_dom_sfc( tmask, 'W', e1e2w_crs, e1e2w_msk, p_e1=e1t, p_e2=e2t ) CALL crs_dom_sfc( umask, 'U', e2e3u_crs, e2e3u_msk, p_e2=e2u, p_e3=ze3u ) CALL crs_dom_sfc( vmask, 'V', e1e3v_crs, e1e3v_msk, p_e1=e1v, p_e3=ze3v ) facsurfu(:,:,:) = umask_crs(:,:,:) * e2e3u_msk(:,:,:) / e2e3u_crs(:,:,:) facsurfv(:,:,:) = vmask_crs(:,:,:) * e1e3v_msk(:,:,:) / e1e3v_crs(:,:,:) ! 3.d.3 Vertical scale factors ! CALL crs_dom_e3( e1t, e2t, ze3t, e1e2w_crs, 'T', tmask, e3t_crs, e3t_max_crs) CALL crs_dom_e3( e1u, e2u, ze3u, e2e3u_crs, 'U', umask, e3u_crs, e3u_max_crs) CALL crs_dom_e3( e1v, e2v, ze3v, e1e3v_crs, 'V', vmask, e3v_crs, e3v_max_crs) CALL crs_dom_e3( e1t, e2t, ze3w, e1e2w_crs, 'W', tmask, e3w_crs, e3w_max_crs) ! Replace 0 by e3t_0 or e3w_0 DO jk = 1, jpk DO ji = 1, jpi_crs DO jj = 1, jpj_crs IF( e3t_crs(ji,jj,jk) == 0._wp ) e3t_crs(ji,jj,jk) = e3t_1d(jk) IF( e3w_crs(ji,jj,jk) == 0._wp ) e3w_crs(ji,jj,jk) = e3w_1d(jk) IF( e3u_crs(ji,jj,jk) == 0._wp ) e3u_crs(ji,jj,jk) = e3t_1d(jk) IF( e3v_crs(ji,jj,jk) == 0._wp ) e3v_crs(ji,jj,jk) = e3t_1d(jk) ENDDO ENDDO ENDDO ! 3.d.3 Vertical depth (meters) CALL crs_dom_ope( gdept_0, 'MAX', 'T', tmask, gdept_crs, p_e3=ze3t, psgn=1.0 ) CALL crs_dom_ope( gdepw_0, 'MAX', 'W', tmask, gdepw_crs, p_e3=ze3w, psgn=1.0 ) !--------------------------------------------------------- ! 4. Coarse grid ocean volume and averaging weights !--------------------------------------------------------- ! 4.a. Ocean volume or area unmasked and masked CALL crs_dom_facvol( tmask, 'T', e1t, e2t, ze3t, ocean_volume_crs_t, facvol_t ) ! bt_crs(:,:,:) = ocean_volume_crs_t(:,:,:) * facvol_t(:,:,:) ! r1_bt_crs(:,:,:) = 0._wp WHERE( bt_crs /= 0._wp ) r1_bt_crs(:,:,:) = 1._wp / bt_crs(:,:,:) CALL crs_dom_facvol( tmask, 'W', e1t, e2t, ze3w, ocean_volume_crs_w, facvol_w ) ! !--------------------------------------------------------- ! 5. Write out coarse meshmask (see OCE/DOM/domwri.F90 for ideas later) !--------------------------------------------------------- IF( ln_msh_crs ) THEN CALL dom_grid_crs ! Save the parent grid information & Switch to coarse grid domain CALL crs_dom_wri CALL dom_grid_glo ! Return to parent grid domain ENDIF !--------------------------------------------------------- ! 7. Finish and clean-up !--------------------------------------------------------- ! END SUBROUTINE crs_init !!====================================================================== END MODULE crsini