1 | MODULE diahth |
---|
2 | !!====================================================================== |
---|
3 | !! *** MODULE diahth *** |
---|
4 | !! Ocean diagnostics: thermocline and 20 degree depth |
---|
5 | !!====================================================================== |
---|
6 | #if defined key_diahth || defined key_esopa |
---|
7 | !!---------------------------------------------------------------------- |
---|
8 | !! 'key_diahth' : thermocline depth diag. |
---|
9 | !!---------------------------------------------------------------------- |
---|
10 | !! dia_hth : Compute diagnostics associated with the thermocline |
---|
11 | !!---------------------------------------------------------------------- |
---|
12 | !! * Modules used |
---|
13 | USE oce ! ocean dynamics and tracers |
---|
14 | USE dom_oce ! ocean space and time domain |
---|
15 | USE phycst ! physical constants |
---|
16 | USE in_out_manager ! I/O manager |
---|
17 | |
---|
18 | IMPLICIT NONE |
---|
19 | PRIVATE |
---|
20 | |
---|
21 | !! * Routine accessibility |
---|
22 | PUBLIC dia_hth ! routine called by step.F90 |
---|
23 | |
---|
24 | !! * Shared module variables |
---|
25 | LOGICAL , PUBLIC, PARAMETER :: & |
---|
26 | lk_diahth = .TRUE. ! thermocline-20d depths flag |
---|
27 | REAL(wp), PUBLIC, DIMENSION(jpi,jpj) :: & |
---|
28 | hth , & ! depth of the max vertical temperature gradient (m) |
---|
29 | hd20 , & ! depth of 20 C isotherm (m) |
---|
30 | hd28 , & ! depth of 28 C isotherm (m) |
---|
31 | htc3 ! heat content of first 300 m |
---|
32 | |
---|
33 | !! * Substitutions |
---|
34 | # include "domzgr_substitute.h90" |
---|
35 | !!---------------------------------------------------------------------- |
---|
36 | !! OPA 9.0 , LODYC-IPSL (2003) |
---|
37 | !!---------------------------------------------------------------------- |
---|
38 | |
---|
39 | CONTAINS |
---|
40 | |
---|
41 | SUBROUTINE dia_hth( kt ) |
---|
42 | !!--------------------------------------------------------------------- |
---|
43 | !! *** ROUTINE dia_hth *** |
---|
44 | !! |
---|
45 | !! ** Purpose : |
---|
46 | !! Computes the depth of strongest vertical temperature gradient |
---|
47 | !! Computes the depth of the 20 degree isotherm |
---|
48 | !! Computes the depth of the 28 degree isotherm |
---|
49 | !! Computes the heat content of first 300 m |
---|
50 | !! |
---|
51 | !! ** Method : |
---|
52 | !! |
---|
53 | !! History : |
---|
54 | !! ! 94-09 (J.-P. Boulanger) Original code |
---|
55 | !! ! 96-11 (E. Guilyardi) OPA8 |
---|
56 | !! ! 97-08 (G. Madec) optimization |
---|
57 | !! ! 99-07 (E. Guilyardi) hd28 + heat content |
---|
58 | !! 8.5 ! 02-06 (G. Madec) F90: Free form and module |
---|
59 | !!------------------------------------------------------------------- |
---|
60 | !! * Arguments |
---|
61 | INTEGER, INTENT( in ) :: kt ! ocean time-step index |
---|
62 | |
---|
63 | !! * Local declarations |
---|
64 | INTEGER :: ji, jj, jk ! dummy loop arguments |
---|
65 | INTEGER :: iid, iif, ilevel ! temporary integers |
---|
66 | INTEGER, DIMENSION(jpi) :: idepth |
---|
67 | INTEGER, DIMENSION(jpi,jpj) :: ikc |
---|
68 | |
---|
69 | REAL(wp) :: zd, zmoy ! temporary scalars |
---|
70 | REAL(wp), DIMENSION(jpi) :: zmax |
---|
71 | REAL(wp), DIMENSION(jpi,jpk) :: zdzt |
---|
72 | !!---------------------------------------------------------------------- |
---|
73 | |
---|
74 | IF( kt == nit000 ) THEN |
---|
75 | IF(lwp) WRITE(numout,*) |
---|
76 | IF(lwp) WRITE(numout,*) 'dia_hth : diagnostics of the thermocline depth' |
---|
77 | IF(lwp) WRITE(numout,*) '~~~~~~~ ' |
---|
78 | IF(lwp) WRITE(numout,*) |
---|
79 | ENDIF |
---|
80 | |
---|
81 | |
---|
82 | ! -------------------------- ! |
---|
83 | ! Depth of the thermocline ! |
---|
84 | ! -------------------------- ! |
---|
85 | ! The depth of the thermocline is defined as the depth of the |
---|
86 | ! strongest vertical temperature gradient |
---|
87 | |
---|
88 | DO jj = 1, jpj |
---|
89 | |
---|
90 | ! vertical gradient of temperature |
---|
91 | DO jk = 2, jpkm1 |
---|
92 | zdzt(:,jk) = ( tn(:,jj,jk-1) - tn(:,jj,jk) ) / fse3w(:,jj,jk) * tmask(:,jj,jk) |
---|
93 | END DO |
---|
94 | |
---|
95 | ! search the level of maximum vertical temperature gradient |
---|
96 | zmax (:) = 0.e0 |
---|
97 | idepth(:) = 1 |
---|
98 | DO jk = jpkm1, 2, -1 |
---|
99 | DO ji = 1, jpi |
---|
100 | IF( zdzt(ji,jk) > zmax(ji) ) THEN |
---|
101 | zmax (ji) = zdzt(ji,jk) |
---|
102 | idepth(ji) = jk |
---|
103 | ENDIF |
---|
104 | END DO |
---|
105 | END DO |
---|
106 | |
---|
107 | ! depth of the thermocline |
---|
108 | DO ji = 1, jpi |
---|
109 | hth(ji,jj) = fsdepw(ji,jj,idepth(ji)) |
---|
110 | END DO |
---|
111 | |
---|
112 | END DO |
---|
113 | |
---|
114 | |
---|
115 | ! ----------------------- ! |
---|
116 | ! Depth of 20C isotherm ! |
---|
117 | ! ----------------------- ! |
---|
118 | |
---|
119 | ! initialization to the number of ocean w-point mbathy |
---|
120 | ! (cf dommsk, minimum value: 1) |
---|
121 | ikc(:,:) = 1 |
---|
122 | |
---|
123 | ! search the depth of 20 degrees isotherm |
---|
124 | ! ( starting from the top, last level above 20C, if not exist, = 1) |
---|
125 | DO jk = 1, jpkm1 |
---|
126 | DO jj = 1, jpj |
---|
127 | DO ji = 1, jpi |
---|
128 | IF( tn(ji,jj,jk) >= 20. ) ikc(ji,jj) = jk |
---|
129 | END DO |
---|
130 | END DO |
---|
131 | END DO |
---|
132 | |
---|
133 | ! Depth of 20C isotherm |
---|
134 | DO jj = 1, jpj |
---|
135 | DO ji = 1, jpi |
---|
136 | iid = ikc(ji,jj) |
---|
137 | iif = mbathy(ji,jj) |
---|
138 | IF( iid /= 1 ) THEN |
---|
139 | ! linear interpolation |
---|
140 | zd = fsdept(ji,jj,iid) & |
---|
141 | + ( fsdept(ji,jj,iid+1) - fsdept(ji,jj,iid) ) & |
---|
142 | * ( 20.*tmask(ji,jj,iid+1) - tn(ji,jj,iid) ) & |
---|
143 | / ( tn(ji,jj,iid+1) - tn(ji,jj,iid) & |
---|
144 | + (1.-tmask(ji,jj,1)) ) |
---|
145 | ! bound by the ocean depth, minimum value, first T-point depth |
---|
146 | hd20(ji,jj) = MIN( zd*tmask(ji,jj,1), fsdepw(ji,jj,iif)) |
---|
147 | ELSE |
---|
148 | hd20(ji,jj)=0. |
---|
149 | ENDIF |
---|
150 | END DO |
---|
151 | END DO |
---|
152 | |
---|
153 | ! ----------------------- ! |
---|
154 | ! Depth of 28C isotherm ! |
---|
155 | ! ----------------------- ! |
---|
156 | |
---|
157 | ! initialization to the number of ocean w-point mbathy |
---|
158 | ! (cf dommsk, minimum value: 1) |
---|
159 | ikc(:,:) = 1 |
---|
160 | |
---|
161 | ! search the depth of 28 degrees isotherm |
---|
162 | ! ( starting from the top, last level above 28C, if not exist, = 1) |
---|
163 | DO jk = 1, jpkm1 |
---|
164 | DO jj = 1, jpj |
---|
165 | DO ji = 1, jpi |
---|
166 | IF( tn(ji,jj,jk) >= 28. ) ikc(ji,jj) = jk |
---|
167 | END DO |
---|
168 | END DO |
---|
169 | END DO |
---|
170 | |
---|
171 | ! Depth of 28C isotherm |
---|
172 | DO jj = 1, jpj |
---|
173 | DO ji = 1, jpi |
---|
174 | iid = ikc(ji,jj) |
---|
175 | iif = mbathy(ji,jj) |
---|
176 | IF( iid /= 1 ) THEN |
---|
177 | ! linear interpolation |
---|
178 | zd = fsdept(ji,jj,iid) & |
---|
179 | + ( fsdept(ji,jj,iid+1) - fsdept(ji,jj,iid) ) & |
---|
180 | * ( 28.*tmask(ji,jj,iid+1) - tn(ji,jj,iid) ) & |
---|
181 | / ( tn(ji,jj,iid+1) - tn(ji,jj,iid) & |
---|
182 | + ( 1. - tmask(ji,jj,1) ) ) |
---|
183 | ! bound by the ocean depth, minimum value, first T-point depth |
---|
184 | hd28(ji,jj) = MIN( zd*tmask(ji,jj,1), fsdepw(ji,jj,iif) ) |
---|
185 | ELSE |
---|
186 | hd28(ji,jj) = 0. |
---|
187 | ENDIF |
---|
188 | END DO |
---|
189 | END DO |
---|
190 | |
---|
191 | ! ----------------------------------------- ! |
---|
192 | ! Heat content of first 300 m (18 levels) ! |
---|
193 | ! ----------------------------------------- ! |
---|
194 | |
---|
195 | htc3(:,:) = 0.e0 |
---|
196 | ilevel = 18 |
---|
197 | zmoy = rau0 * rcp * 0.5 |
---|
198 | |
---|
199 | ! intregrate tn from surface to klevel |
---|
200 | |
---|
201 | DO jk = 1, ilevel |
---|
202 | htc3(:,:) = htc3(:,:) & |
---|
203 | + zmoy * ( tn(:,:,jk) + tn(:,:,jk+1) ) * fse3w(:,:,jk) * tmask(:,:,jk) |
---|
204 | END DO |
---|
205 | |
---|
206 | END SUBROUTINE dia_hth |
---|
207 | |
---|
208 | #else |
---|
209 | !!---------------------------------------------------------------------- |
---|
210 | !! Default option : Empty module |
---|
211 | !!---------------------------------------------------------------------- |
---|
212 | LOGICAL , PUBLIC, PARAMETER :: & |
---|
213 | lk_diahth = .FALSE. ! thermocline-20d depths flag |
---|
214 | CONTAINS |
---|
215 | SUBROUTINE dia_hth( kt ) ! Empty routine |
---|
216 | WRITE(*,*) kt |
---|
217 | END SUBROUTINE dia_hth |
---|
218 | #endif |
---|
219 | |
---|
220 | !!====================================================================== |
---|
221 | END MODULE diahth |
---|