LCOV - code coverage report
Current view: | top level - physics/cam - beljaars_drag_cam.F90 (source / functions) |  |  | Hit | Total | Coverage
Test: | coverage.info |  | Lines: | 50 | 54 | 92.6 %
Date: | 2024-12-17 22:39:59 |  | Functions: | 4 | 4 | 100.0 %

              Line data    Source code
           1             : module beljaars_drag_cam
           2             :
           3             : use shr_kind_mod, only: r8 => shr_kind_r8
           4             : use spmd_utils, only: masterproc
           5             : use cam_abortutils, only: endrun
           6             : use shr_log_mod, only: errMsg => shr_log_errMsg
           7             : use cam_logfile, only: iulog
           8             : use ppgrid, only: pcols, pver
           9             :
          10             : implicit none
          11             : private
          12             :
          13             : public :: beljaars_drag_readnl
          14             : public :: beljaars_drag_register
          15             : public :: beljaars_drag_init
          16             : public :: beljaars_drag_tend
          17             :
          18             : ! Is this module on at all?
          19             : logical, public, protected :: do_beljaars = .false.
          20             :
          21             : ! Tuning parameters for TMS.
          22             : real(r8) :: blj_orocnst
          23             : real(r8) :: blj_z0fac
          24             :
          25             : ! pbuf field indices
          26             : integer :: &
          27             :      sgh30_idx = -1, &
          28             :      dragblj_idx = -1, &
          29             :      taubljx_idx = -1, &
          30             :      taubljy_idx = -1
          31             :
          32             : contains
          33             :
          34     1490712 : subroutine beljaars_drag_readnl(nlfile)
          35             :   use namelist_utils, only: find_group_name
          36             :   use units, only: getunit, freeunit
          37             :   use spmd_utils, only: masterprocid, mpi_logical, mpi_real8, mpicom
          38             :
          39             :   ! filepath for file containing namelist input
          40             :   character(len=*), intent(in) :: nlfile
          41             :
          42             :   ! file unit and error code
          43             :   integer :: unitn, ierr
          44             :
          45             :   character(len=*), parameter :: subname = "beljaars_drag_readnl"
          46             :
          47             :   namelist /blj_nl/ do_beljaars
          48             :
          49        1536 :   ierr = 0
          50             :
          51        1536 :   if (masterproc) then
          52           2 :      unitn = getunit()
          53           2 :      open( unitn, file=trim(nlfile), status='old' )
          54           2 :      call find_group_name(unitn, 'blj_nl', status=ierr)
          55           2 :      if (ierr == 0) then
          56           2 :         read(unitn, blj_nl, iostat=ierr)
          57           2 :         if (ierr /= 0) then
          58           0 :            call endrun(subname // ':: ERROR reading namelist')
          59             :         end if
          60             :      end if
          61           2 :      close(unitn)
          62           2 :      call freeunit(unitn)
          63             :   end if
          64             :
          65        1536 :   call mpi_bcast(do_beljaars,      1, mpi_logical, masterprocid, mpicom, ierr)
          66        1536 :   if (ierr /= 0) call endrun(errMsg(__FILE__, __LINE__)//" mpi_bcast error")
          67             :
          68        1536 : end subroutine beljaars_drag_readnl
          69             :
          70        1536 : subroutine beljaars_drag_register()
          71             :   use physics_buffer, only: pbuf_add_field, dtype_r8
          72             :
          73        1536 :   call pbuf_add_field("dragblj", "physpkg", dtype_r8, (/pcols,pver/), dragblj_idx)
          74        1536 :   call pbuf_add_field("taubljx", "physpkg", dtype_r8, (/pcols/), taubljx_idx)
          75        1536 :   call pbuf_add_field("taubljy", "physpkg", dtype_r8, (/pcols/), taubljy_idx)
          76             :
          77        1536 : end subroutine beljaars_drag_register
          78             :
          79        1536 : subroutine beljaars_drag_init()
          80             :
          81        1536 :   use cam_history, only: addfld, add_default, horiz_only
          82             :   use error_messages, only: handle_errmsg
          83             :   use phys_control, only: phys_getopts
          84             :   use physconst, only: karman, gravit, rair
          85             :   use physics_buffer, only: pbuf_get_index
          86             :   use beljaars_drag, only: init_blj
          87             :
          88             :   logical :: history_amwg
          89             :
          90             :   character(len=128) :: errstring
          91             :
          92        1536 :   if (.not. do_beljaars) return
          93             :
          94        1536 :   call phys_getopts(history_amwg_out=history_amwg)
          95             :
          96        1536 :   call init_blj( r8, gravit, rair, errstring )
          97        1536 :   call handle_errmsg(errstring, subname="init_blj")
          98             :
          99        3072 :   call addfld('DRAGBLJ', (/ 'lev' /) , 'A', '1/s', 'Drag profile from Beljaars SGO              ')
         100        1536 :   call addfld('TAUBLJX', horiz_only, 'A', 'N/m2',  'Zonal      integrated drag from Beljaars SGO')
         101        1536 :   call addfld('TAUBLJY', horiz_only, 'A', 'N/m2',  'Meridional integrated drag from Beljaars SGO')
         102        1536 :   if (history_amwg) then
         103        1536 :      call add_default( 'TAUBLJX ', 1, ' ' )
         104        1536 :      call add_default( 'TAUBLJY ', 1, ' ' )
         105             :   end if
         106             :
         107        1536 :   if (masterproc) then
         108           2 :      write(iulog,*)'Using Beljaars SGO drag module'
         109             :   end if
         110             :
         111        1536 :   sgh30_idx = pbuf_get_index("SGH30")
         112             :
         113        1536 : end subroutine beljaars_drag_init
         114             :
         115     1489176 : subroutine beljaars_drag_tend(state, pbuf, cam_in)
         116        1536 :   use physics_buffer, only: physics_buffer_desc, pbuf_get_field
         117             :   use physics_types, only: physics_state
         118             :   use camsrfexch, only: cam_in_t
         119             :   use cam_history, only: outfld
         120             :   use beljaars_drag, only: compute_blj
         121             :
         122             :   type(physics_state), intent(in) :: state
         123             :   type(physics_buffer_desc), pointer, intent(in) :: pbuf(:)
         124             :   type(cam_in_t), intent(in) :: cam_in
         125             :
         126     1489176 :   real(r8), pointer :: sgh30(:)
         127     1489176 :   real(r8), pointer :: dragblj(:,:)
         128     1489176 :   real(r8), pointer :: taubljx(:), taubljy(:)
         129             :
         130     1489176 :   call pbuf_get_field(pbuf, dragblj_idx, dragblj)
         131     1489176 :   call pbuf_get_field(pbuf, taubljx_idx, taubljx)
         132     1489176 :   call pbuf_get_field(pbuf, taubljy_idx, taubljy)
         133             :
         134     1489176 :   if (.not. do_beljaars) then
         135           0 :      dragblj = 0._r8
         136           0 :      taubljx = 0._r8
         137           0 :      taubljy = 0._r8
         138             :      return
         139             :   end if
         140             :
         141     1489176 :   call pbuf_get_field(pbuf, sgh30_idx, sgh30)
         142             :
         143             :   call compute_blj( pcols    , pver    , state%ncol , &
         144             :        state%u    , state%v  , state%t , state%pmid , &
         145             :        state%pdel , state%zm , sgh30   , dragblj    , &
         146     1489176 :        taubljx    , taubljy  , cam_in%landfrac )
         147             :
         148     1489176 :   call outfld("TAUBLJX", taubljx, pcols, state%lchnk)
         149     1489176 :   call outfld("TAUBLJY", taubljy, pcols, state%lchnk)
         150     1489176 :   call outfld("DRAGBLJ", dragblj, pcols, state%lchnk)
         151             :
         152     2978352 : end subroutine beljaars_drag_tend
         153             :
         154             : end module beljaars_drag_cam

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