da_jo_and_grady_synop.inc

1 subroutine da_jo_and_grady_synop(iv, re, jo, jo_grad_y)
2 
3    !-----------------------------------------------------------------------
4    ! Purpose: TBD
5    !-----------------------------------------------------------------------
6 
7    implicit none
8 
9    type (ob_type), intent(in)   :: iv          ! Innovation vector.
10    type (y_type),  intent(in)   :: re          ! Residual vector.
11    type (y_type),  intent(inout):: jo_grad_y   ! Grad_y(Jo)
12    type (jo_type), intent(inout):: jo          ! Obs cost function.
13 
14    integer                      :: n
15    ! the following "global" objects are used only when testing
16    type (ob_type) :: iv_glob         ! Global Innovation vector (O-B).
17    type (y_type)  :: re_glob         ! Global Residual vector (O-A).
18    type (y_type)  :: jo_grad_y_glob  ! Global Grad_y(Jo)
19 
20    jo % synop_u = 0.0
21    jo % synop_v = 0.0
22    jo % synop_t = 0.0
23    jo % synop_p = 0.0
24    jo % synop_q = 0.0
25 
26    if (testing_dm_exact) then
27       if (iv%num_synop_glo == 0) return
28    else
29       if (iv%num_synop < 1) return
30    end if
31 
32    do n=1, iv%num_synop
33 
34          jo_grad_y%synop(n)%u = -re%synop(n)%u / &
35                                (iv%synop(n)%u%error * iv%synop(n)%u%error)
36          jo_grad_y%synop(n)%v = -re%synop(n)%v / &
37                                (iv%synop(n)%v%error * iv%synop(n)%v%error)
38          jo_grad_y%synop(n)%t = -re%synop(n)%t / &
39                                (iv%synop(n)%t%error * iv%synop(n)%t%error)
40          jo_grad_y%synop(n)%p = -re%synop(n)%p / &
41                                (iv%synop(n)%p%error * iv%synop(n)%p%error)
42          jo_grad_y%synop(n)%q = -re%synop(n)%q / &
43                                (iv%synop(n)%q%error * iv%synop(n)%q%error)
44    end do
45 
46    ! Bitwise-exact reduction preserves operation order of serial code for
47    ! testing, at the cost of much-increased run-time.  Turn it off when not
48    ! testing.  This will always be .false. for a serial run.
49    if (testing_dm_exact) then
50       ! collect all obs in serial order and allocate global objects
51       call da_to_global_synop(iv,      re,      jo_grad_y, &
52                            iv_glob, re_glob, jo_grad_y_glob)
53       ! perform remaining computations
54       call da_jo_synop_uvtq(iv_glob, re_glob, jo_grad_y_glob, jo)
55       ! free global objects
56       call da_deallocate_global_synop(iv_glob, re_glob, jo_grad_y_glob)
57    else
58       ! perform remaining computations
59       call da_jo_synop_uvtq(iv, re, jo_grad_y, jo)
60    end if
61 
62    jo % synop_u = 0.5 * jo % synop_u
63    jo % synop_v = 0.5 * jo % synop_v
64    jo % synop_t = 0.5 * jo % synop_t
65    jo % synop_p = 0.5 * jo % synop_p
66    jo % synop_q = 0.5 * jo % synop_q
67 
68 end subroutine da_jo_and_grady_synop
69 
70