1 | MODULE asmlogchlbal_ersem |
---|
2 | !!====================================================================== |
---|
3 | !! *** MODULE asmlogchlbal_ersem *** |
---|
4 | !! Calculate increments to ERSEM based on surface logchl increments |
---|
5 | !!====================================================================== |
---|
6 | !! History : 3.6 ! 2016-09 (D. Ford) Original code |
---|
7 | !!---------------------------------------------------------------------- |
---|
8 | #if defined key_asminc && defined key_fabm |
---|
9 | !!---------------------------------------------------------------------- |
---|
10 | !! 'key_asminc' : assimilation increment interface |
---|
11 | !! 'key_fabm' : FABM-ERSEM coupling |
---|
12 | !!---------------------------------------------------------------------- |
---|
13 | !! asm_logchl_bal_ersem : routine to calculate increments to ERSEM |
---|
14 | !!---------------------------------------------------------------------- |
---|
15 | USE par_kind, ONLY: wp ! kind parameters |
---|
16 | USE par_oce, ONLY: jpi, jpj, jpk ! domain array sizes |
---|
17 | USE dom_oce, ONLY: gdepw_n ! domain information |
---|
18 | USE zdfmxl ! mixed layer depth |
---|
19 | USE iom ! i/o |
---|
20 | USE trc, ONLY: trn ! ERSEM state variables |
---|
21 | USE par_fabm ! FABM parameters |
---|
22 | USE par_trc, ONLY: jptra ! Tracer parameters |
---|
23 | |
---|
24 | IMPLICIT NONE |
---|
25 | PRIVATE |
---|
26 | |
---|
27 | PUBLIC asm_logchl_bal_ersem |
---|
28 | |
---|
29 | REAL(wp), PARAMETER :: tiny = 1e-20 |
---|
30 | |
---|
31 | CONTAINS |
---|
32 | |
---|
33 | SUBROUTINE asm_logchl_bal_ersem( ln_logchlpftinc, npfts, mld_choice_bgc, & |
---|
34 | & logchl_bkginc, logchl_balinc ) |
---|
35 | !!--------------------------------------------------------------------------- |
---|
36 | !! *** ROUTINE asm_logchl_bal_ersem *** |
---|
37 | !! |
---|
38 | !! ** Purpose : calculate increments to ERSEM from logchl increments |
---|
39 | !! |
---|
40 | !! ** Method : forthcoming... |
---|
41 | !! |
---|
42 | !! ** Action : forthcoming... |
---|
43 | !! |
---|
44 | !! References : forthcoming... |
---|
45 | !!--------------------------------------------------------------------------- |
---|
46 | !! |
---|
47 | LOGICAL, INTENT(in ) :: ln_logchlpftinc |
---|
48 | INTEGER, INTENT(in ) :: npfts |
---|
49 | INTEGER, INTENT(in ) :: mld_choice_bgc |
---|
50 | REAL(wp), INTENT(in ), DIMENSION(jpi,jpj,npfts) :: logchl_bkginc |
---|
51 | REAL(wp), INTENT( out), DIMENSION(jpi,jpj,jpk,jptra) :: logchl_balinc |
---|
52 | !! |
---|
53 | INTEGER :: ji, jj, jk |
---|
54 | INTEGER :: jkmax |
---|
55 | REAL(wp) :: chl_tot, chl_inc |
---|
56 | REAL(wp), DIMENSION(jpi,jpj) :: zmld |
---|
57 | !!--------------------------------------------------------------------------- |
---|
58 | |
---|
59 | ! Split surface logchl incs into surface Chl1-4 incs |
---|
60 | ! |
---|
61 | ! In order to transform logchl incs to chl incs, need to account for the background, |
---|
62 | ! cannot simply do 10^logchl_bkginc. Need to: |
---|
63 | ! 1) Add logchl inc to log10(background) to get log10(analysis) |
---|
64 | ! 2) Take 10^log10(analysis) to get analysis |
---|
65 | ! 3) Subtract background from analysis to get chl incs |
---|
66 | ! |
---|
67 | IF ( ln_logchlpftinc ) THEN |
---|
68 | ! |
---|
69 | ! Assimilating separate PFTs, so separately transform each from LogChl to Chl |
---|
70 | ! |
---|
71 | IF ( npfts /= 4 ) THEN |
---|
72 | CALL ctl_stop( 'If assimilating PFTs into ERSEM, nn_asmpfts must be 4' ) |
---|
73 | ENDIF |
---|
74 | DO jj = 1, jpj |
---|
75 | DO ji = 1, jpi |
---|
76 | IF ( ( trn(ji,jj,1,jp_fabm_m1+jp_fabm_chl1) > 0.0 ) .AND. & |
---|
77 | & ( trn(ji,jj,1,jp_fabm_m1+jp_fabm_chl2) > 0.0 ) .AND. & |
---|
78 | & ( trn(ji,jj,1,jp_fabm_m1+jp_fabm_chl3) > 0.0 ) .AND. & |
---|
79 | & ( trn(ji,jj,1,jp_fabm_m1+jp_fabm_chl4) > 0.0 ) ) THEN |
---|
80 | logchl_balinc(ji,jj,1,jp_fabm_m1+jp_fabm_chl1) = 10**( LOG10( trn(ji,jj,1,jp_fabm_m1+jp_fabm_chl1) ) + & |
---|
81 | & logchl_bkginc(ji,jj,1) ) - & |
---|
82 | & trn(ji,jj,1,jp_fabm_m1+jp_fabm_chl1) |
---|
83 | logchl_balinc(ji,jj,1,jp_fabm_m1+jp_fabm_chl2) = 10**( LOG10( trn(ji,jj,1,jp_fabm_m1+jp_fabm_chl2) ) + & |
---|
84 | & logchl_bkginc(ji,jj,2) ) - & |
---|
85 | & trn(ji,jj,1,jp_fabm_m1+jp_fabm_chl2) |
---|
86 | logchl_balinc(ji,jj,1,jp_fabm_m1+jp_fabm_chl3) = 10**( LOG10( trn(ji,jj,1,jp_fabm_m1+jp_fabm_chl3) ) + & |
---|
87 | & logchl_bkginc(ji,jj,3) ) - & |
---|
88 | & trn(ji,jj,1,jp_fabm_m1+jp_fabm_chl3) |
---|
89 | logchl_balinc(ji,jj,1,jp_fabm_m1+jp_fabm_chl4) = 10**( LOG10( trn(ji,jj,1,jp_fabm_m1+jp_fabm_chl4) ) + & |
---|
90 | & logchl_bkginc(ji,jj,4) ) - & |
---|
91 | & trn(ji,jj,1,jp_fabm_m1+jp_fabm_chl4) |
---|
92 | ENDIF |
---|
93 | END DO |
---|
94 | END DO |
---|
95 | ELSE |
---|
96 | ! |
---|
97 | ! Assimilating total Chl, so transform total from LogChl to Chl |
---|
98 | ! and split between PFTs according to the existing background ratios |
---|
99 | ! |
---|
100 | IF ( npfts /= 1 ) THEN |
---|
101 | CALL ctl_stop( 'If assimilating total chlorophyll, nn_asmpfts must be 1' ) |
---|
102 | ENDIF |
---|
103 | DO jj = 1, jpj |
---|
104 | DO ji = 1, jpi |
---|
105 | IF ( ( trn(ji,jj,1,jp_fabm_m1+jp_fabm_chl1) > 0.0 ) .AND. & |
---|
106 | & ( trn(ji,jj,1,jp_fabm_m1+jp_fabm_chl2) > 0.0 ) .AND. & |
---|
107 | & ( trn(ji,jj,1,jp_fabm_m1+jp_fabm_chl3) > 0.0 ) .AND. & |
---|
108 | & ( trn(ji,jj,1,jp_fabm_m1+jp_fabm_chl4) > 0.0 ) ) THEN |
---|
109 | chl_tot = trn(ji,jj,1,jp_fabm_m1+jp_fabm_chl1) + trn(ji,jj,1,jp_fabm_m1+jp_fabm_chl2) + & |
---|
110 | & trn(ji,jj,1,jp_fabm_m1+jp_fabm_chl3) + trn(ji,jj,1,jp_fabm_m1+jp_fabm_chl4) |
---|
111 | chl_inc = 10**( LOG10( chl_tot ) + logchl_bkginc(ji,jj,1) ) - chl_tot |
---|
112 | logchl_balinc(ji,jj,1,jp_fabm_m1+jp_fabm_chl1) = chl_inc * trn(ji,jj,1,jp_fabm_m1+jp_fabm_chl1) / chl_tot |
---|
113 | logchl_balinc(ji,jj,1,jp_fabm_m1+jp_fabm_chl2) = chl_inc * trn(ji,jj,1,jp_fabm_m1+jp_fabm_chl2) / chl_tot |
---|
114 | logchl_balinc(ji,jj,1,jp_fabm_m1+jp_fabm_chl3) = chl_inc * trn(ji,jj,1,jp_fabm_m1+jp_fabm_chl3) / chl_tot |
---|
115 | logchl_balinc(ji,jj,1,jp_fabm_m1+jp_fabm_chl4) = chl_inc * trn(ji,jj,1,jp_fabm_m1+jp_fabm_chl4) / chl_tot |
---|
116 | ENDIF |
---|
117 | END DO |
---|
118 | END DO |
---|
119 | ENDIF |
---|
120 | |
---|
121 | ! Propagate surface Chl1-4 incs through mixed layer |
---|
122 | ! First, choose mixed layer definition |
---|
123 | ! |
---|
124 | SELECT CASE( mld_choice_bgc ) |
---|
125 | CASE ( 1 ) ! Turbocline/mixing depth [W points] |
---|
126 | zmld(:,:) = hmld(:,:) |
---|
127 | CASE ( 2 ) ! Density criterion (0.01 kg/m^3 change from 10m) [W points] |
---|
128 | zmld(:,:) = hmlp(:,:) |
---|
129 | CASE ( 3 ) ! Kara MLD [Interpolated] |
---|
130 | #if defined key_karaml |
---|
131 | IF ( ln_kara ) THEN |
---|
132 | zmld(:,:) = hmld_kara(:,:) |
---|
133 | ELSE |
---|
134 | CALL ctl_stop( ' Kara mixed layer requested for LogChl assimilation,', & |
---|
135 | & ' but ln_kara=.false.' ) |
---|
136 | ENDIF |
---|
137 | #else |
---|
138 | CALL ctl_stop( ' Kara mixed layer requested for LogChl assimilation,', & |
---|
139 | & ' but is not defined' ) |
---|
140 | #endif |
---|
141 | CASE ( 4 ) ! Temperature criterion (0.2 K change from surface) [T points] |
---|
142 | zmld(:,:) = hmld_tref(:,:) |
---|
143 | CASE ( 5 ) ! Density criterion (0.01 kg/m^3 change from 10m) [T points] |
---|
144 | zmld(:,:) = hmlpt(:,:) |
---|
145 | END SELECT |
---|
146 | ! |
---|
147 | ! Now set MLD to bottom of a level and propagate incs equally through mixed layer |
---|
148 | ! |
---|
149 | DO jj = 1, jpj |
---|
150 | DO ji = 1, jpi |
---|
151 | ! |
---|
152 | jkmax = jpk-1 |
---|
153 | DO jk = jpk-1, 1, -1 |
---|
154 | IF ( ( zmld(ji,jj) > gdepw_n(ji,jj,jk) ) .AND. & |
---|
155 | & ( zmld(ji,jj) <= gdepw_n(ji,jj,jk+1) ) ) THEN |
---|
156 | zmld(ji,jj) = gdepw_n(ji,jj,jk+1) |
---|
157 | jkmax = jk |
---|
158 | ENDIF |
---|
159 | END DO |
---|
160 | ! |
---|
161 | DO jk = 2, jkmax |
---|
162 | logchl_balinc(ji,jj,jk,jp_fabm_m1+jp_fabm_chl1) = logchl_balinc(ji,jj,1,jp_fabm_m1+jp_fabm_chl1) |
---|
163 | logchl_balinc(ji,jj,jk,jp_fabm_m1+jp_fabm_chl2) = logchl_balinc(ji,jj,1,jp_fabm_m1+jp_fabm_chl2) |
---|
164 | logchl_balinc(ji,jj,jk,jp_fabm_m1+jp_fabm_chl3) = logchl_balinc(ji,jj,1,jp_fabm_m1+jp_fabm_chl3) |
---|
165 | logchl_balinc(ji,jj,jk,jp_fabm_m1+jp_fabm_chl4) = logchl_balinc(ji,jj,1,jp_fabm_m1+jp_fabm_chl4) |
---|
166 | END DO |
---|
167 | ! |
---|
168 | END DO |
---|
169 | END DO |
---|
170 | |
---|
171 | ! Multivariate balancing forthcoming... |
---|
172 | |
---|
173 | END SUBROUTINE asm_logchl_bal_ersem |
---|
174 | |
---|
175 | #else |
---|
176 | !!---------------------------------------------------------------------- |
---|
177 | !! Default option : Empty routine |
---|
178 | !!---------------------------------------------------------------------- |
---|
179 | CONTAINS |
---|
180 | SUBROUTINE asm_logchl_bal_ersem( ln_logchlpftinc, npfts, mld_choice_bgc, & |
---|
181 | & logchl_bkginc, logchl_balinc ) |
---|
182 | LOGICAL :: ln_logchlpftinc |
---|
183 | INTEGER :: npfts |
---|
184 | INTEGER :: mld_choice_bgc |
---|
185 | REAL :: logchl_bkginc(:,:,:) |
---|
186 | REAL :: logchl_balinc(:,:,:,:) |
---|
187 | WRITE(*,*) 'asm_logchl_bal_ersem: You should not have seen this print! error?' |
---|
188 | END SUBROUTINE asm_logchl_bal_ersem |
---|
189 | #endif |
---|
190 | |
---|
191 | !!====================================================================== |
---|
192 | END MODULE asmlogchlbal_ersem |
---|