1 | MODULE usrdef_sbc |
---|
2 | !!====================================================================== |
---|
3 | !! *** MODULE usrdef_sbc *** |
---|
4 | !! |
---|
5 | !! === SWG configuration === |
---|
6 | !! |
---|
7 | !! User defined : surface forcing of a user configuration |
---|
8 | !!====================================================================== |
---|
9 | !! History : 4.0 ! 2016-03 (S. Flavoni, G. Madec) user defined interface |
---|
10 | !! - ! 2020-03 (A. Nasser) Shallow Water Eq. configuration |
---|
11 | !!---------------------------------------------------------------------- |
---|
12 | |
---|
13 | !!---------------------------------------------------------------------- |
---|
14 | !! usrdef_sbc : user defined surface bounday conditions in GYRE case |
---|
15 | !!---------------------------------------------------------------------- |
---|
16 | USE oce ! ocean dynamics and tracers |
---|
17 | USE dom_oce ! ocean space and time domain |
---|
18 | USE sbc_oce ! Surface boundary condition: ocean fields |
---|
19 | USE phycst ! physical constants |
---|
20 | USE usrdef_nam |
---|
21 | ! |
---|
22 | USE in_out_manager ! I/O manager |
---|
23 | USE lib_mpp ! distribued memory computing library |
---|
24 | USE lbclnk ! ocean lateral boundary conditions (or mpp link) |
---|
25 | USE lib_fortran ! Fortran library |
---|
26 | |
---|
27 | IMPLICIT NONE |
---|
28 | PRIVATE |
---|
29 | |
---|
30 | PUBLIC usrdef_sbc_oce ! routine called in sbcmod module |
---|
31 | PUBLIC usrdef_sbc_ice_tau ! routine called by icestp.F90 for ice dynamics |
---|
32 | PUBLIC usrdef_sbc_ice_flx ! routine called by icestp.F90 for ice thermo |
---|
33 | |
---|
34 | !!---------------------------------------------------------------------- |
---|
35 | !! NEMO/OCE 4.0 , NEMO Consortium (2018) |
---|
36 | !! $Id: usrdef_sbc.F90 10425 2018-12-19 21:54:16Z smasson $ |
---|
37 | !! Software governed by the CeCILL license (see ./LICENSE) |
---|
38 | !!---------------------------------------------------------------------- |
---|
39 | CONTAINS |
---|
40 | |
---|
41 | SUBROUTINE usrdef_sbc_oce( kt, Kbb ) |
---|
42 | !!--------------------------------------------------------------------- |
---|
43 | !! *** ROUTINE usrdef_sbc_oce *** |
---|
44 | !! |
---|
45 | !! ** Purpose : provide at each time-step the GYRE surface boundary |
---|
46 | !! condition, i.e. the momentum, heat and freshwater fluxes. |
---|
47 | !! |
---|
48 | !! ** Method : analytical seasonal cycle for GYRE configuration. |
---|
49 | !! CAUTION : never mask the surface stress field ! |
---|
50 | !! |
---|
51 | !! ** Action : - set the ocean surface boundary condition, i.e. |
---|
52 | !! utau, vtau, taum, wndm, qns, qsr, emp, sfx |
---|
53 | !! |
---|
54 | !!---------------------------------------------------------------------- |
---|
55 | INTEGER, INTENT(in) :: kt ! ocean time step |
---|
56 | INTEGER, INTENT(in) :: Kbb ! ocean time index |
---|
57 | !! |
---|
58 | INTEGER :: ji, jj ! dummy loop indices |
---|
59 | REAL(wp) :: ztauu, ztauv ! wind intensity projeted |
---|
60 | REAL(wp) :: zrhoa = 1.22 ! Air density kg/m3 |
---|
61 | REAL(wp) :: zcdrag = 1.5e-3 ! drag coefficient |
---|
62 | REAL(wp) :: ztx, zty, zmod, zcoef ! temporary variables |
---|
63 | !!--------------------------------------------------------------------- |
---|
64 | |
---|
65 | ! ---------------------------- ! |
---|
66 | ! heat and freshwater fluxes ! (no fluxes) |
---|
67 | ! ---------------------------- ! |
---|
68 | |
---|
69 | emp (:,:) = 0._wp |
---|
70 | sfx (:,:) = 0._wp |
---|
71 | qns (:,:) = 0._wp |
---|
72 | |
---|
73 | ! ---------------------------- ! |
---|
74 | ! momentum fluxes ! |
---|
75 | ! ---------------------------- ! |
---|
76 | ! rotated case (45deg) |
---|
77 | ! ztauu = 0.2_wp / SQRT( 2._wp ) ! N.m-2 |
---|
78 | ! ztauv = 0.2_wp / SQRT( 2._wp) ! N.m-2 |
---|
79 | ! non rotated |
---|
80 | !ztauu = 0.2_wp ! N.m-2 |
---|
81 | !ztauv = 0._wp ! N.m-2 |
---|
82 | ! general case |
---|
83 | ztauu = REAL( rn_tau, wp ) * COS( rn_theta * rad ) ! N.m-2 |
---|
84 | ztauv = - REAL( rn_tau, wp ) * SIN( rn_theta * rad ) ! N.m-2 |
---|
85 | |
---|
86 | DO jj = 1, jpj |
---|
87 | DO ji = 1, jpi |
---|
88 | ! length of the domain : 2000km x 2000km |
---|
89 | utau(ji,jj) = - ztauu * COS( rpi * gphiu(ji,jj) / 2000000._wp) |
---|
90 | vtau(ji,jj) = - ztauv * COS( rpi * gphiv(ji,jj) / 2000000._wp) |
---|
91 | END DO |
---|
92 | END DO |
---|
93 | |
---|
94 | ! module of wind stress and wind speed at T-point |
---|
95 | zcoef = 1. / ( zrhoa * zcdrag ) |
---|
96 | DO jj = 2, jpjm1 |
---|
97 | DO ji = 2, jpim1 |
---|
98 | ztx = utau(ji-1,jj ) + utau(ji,jj) |
---|
99 | zty = vtau(ji ,jj-1) + vtau(ji,jj) |
---|
100 | zmod = 0.5 * SQRT( ztx * ztx + zty * zty ) |
---|
101 | taum(ji,jj) = zmod |
---|
102 | wndm(ji,jj) = SQRT( zmod * zcoef ) |
---|
103 | END DO |
---|
104 | END DO |
---|
105 | |
---|
106 | CALL lbc_lnk( 'usrdef_sbc', taum(:,:), 'T', 1. , wndm(:,:), 'T', 1. ) |
---|
107 | ! |
---|
108 | END SUBROUTINE usrdef_sbc_oce |
---|
109 | |
---|
110 | |
---|
111 | SUBROUTINE usrdef_sbc_ice_tau( kt ) |
---|
112 | INTEGER, INTENT(in) :: kt ! ocean time step |
---|
113 | END SUBROUTINE usrdef_sbc_ice_tau |
---|
114 | |
---|
115 | |
---|
116 | SUBROUTINE usrdef_sbc_ice_flx( kt, phs, phi ) |
---|
117 | INTEGER, INTENT(in) :: kt ! ocean time step |
---|
118 | REAL(wp), DIMENSION(:,:,:), INTENT(in) :: phs ! snow thickness |
---|
119 | REAL(wp), DIMENSION(:,:,:), INTENT(in) :: phi ! ice thickness |
---|
120 | END SUBROUTINE usrdef_sbc_ice_flx |
---|
121 | |
---|
122 | !!====================================================================== |
---|
123 | END MODULE usrdef_sbc |
---|