var/da/da_chem_sfc/da_calculate_grady_chem_sfc.inc

   1 subroutine da_calculate_grady_chem_sfc(iv, re, jo_grad_y)
   2
   3    !-------------------------------------------------------------------------
   4    ! Purpose: Applies obs inverse on re-vector
   5    !-------------------------------------------------------------------------
   6
   7    implicit none
   8
   9    type (iv_type), intent(in)     :: iv          ! Innovation vector.
  10    type (y_type),  intent(inout)  :: re          ! Residual vector.
  11    type (y_type),  intent(inout)  :: jo_grad_y   ! Grad_y(Jo)
  12
  13    integer                      :: n, ichem
  14
  15    if (trace_use_dull) call da_trace_entry("da_calculate_grady_chem_sfc")
  16
  17    do ichem = PARAM_FIRST_SCALAR ,num_chemic_surf
  18    do n=1, iv%info(chemic_surf)%nlocal
  19       if (iv%chemic_surf(n)%chem(ichem)%qc < obs_qc_pointer) re%chemic_surf(n)%chem(ichem) = 0.0
  20
  21       jo_grad_y%chemic_surf(n)%chem(ichem) = -re%chemic_surf(n)%chem(ichem) / &
  22                                              (iv%chemic_surf(n)%chem(ichem)%error * iv%chemic_surf(n)%chem(ichem)%error)
  23    end do
  24    end do
  25
  26    if (trace_use_dull) call da_trace_exit("da_calculate_grady_chem_sfc")
  27
  28 end subroutine da_calculate_grady_chem_sfc
  29
  30