1 | MODULE asmlogchlbal_hadocc |
---|
2 | !!====================================================================== |
---|
3 | !! *** MODULE asmlogchlbal_hadocc *** |
---|
4 | !! Calculate increments to HadOCC based on surface logchl increments |
---|
5 | !! |
---|
6 | !! IMPORTANT NOTE: This calls the bioanalysis routine of Hemmings et al. |
---|
7 | !! For licensing reasons this is kept in its own internal Met Office |
---|
8 | !! branch (dev/frdf/vn3.6_nitrogen_balancing) rather than in the Paris |
---|
9 | !! repository, and must be merged in when building. |
---|
10 | !! |
---|
11 | !!====================================================================== |
---|
12 | !! History : 3.6 ! 2017-08 (D. Ford) Adapted from bioanal.F90 |
---|
13 | !!---------------------------------------------------------------------- |
---|
14 | #if defined key_asminc && defined key_hadocc |
---|
15 | !!---------------------------------------------------------------------- |
---|
16 | !! 'key_asminc' : assimilation increment interface |
---|
17 | !! 'key_hadocc' : HadOCC model |
---|
18 | !!---------------------------------------------------------------------- |
---|
19 | !! asm_logchl_bal_hadocc : routine to calculate increments to HadOCC |
---|
20 | !!---------------------------------------------------------------------- |
---|
21 | USE par_kind, ONLY: wp ! kind parameters |
---|
22 | USE par_oce, ONLY: jpi, jpj, jpk ! domain array sizes |
---|
23 | USE dom_oce, ONLY: gdepw_n ! domain information |
---|
24 | USE zdfmxl ! mixed layer depth |
---|
25 | USE iom ! i/o |
---|
26 | USE trc, ONLY: trn, trb, & ! HadOCC variables |
---|
27 | & HADOCC_CHL |
---|
28 | USE par_hadocc ! HadOCC parameters |
---|
29 | USE had_bgc_stnd, ONLY: kmt ! HadOCC parameters |
---|
30 | USE had_bgc_const ! HadOCC parameters |
---|
31 | USE par_trc, ONLY: jptra ! Tracer parameters |
---|
32 | USE bioanalysis ! Nitrogen balancing |
---|
33 | |
---|
34 | IMPLICIT NONE |
---|
35 | PRIVATE |
---|
36 | |
---|
37 | PUBLIC asm_logchl_bal_hadocc |
---|
38 | |
---|
39 | ! Default values for biological assimilation parameters |
---|
40 | ! Should match Hemmings et al. (2008) |
---|
41 | REAL(wp), PARAMETER :: balnutext = 0.6 !: Default nutrient balancing factor |
---|
42 | REAL(wp), PARAMETER :: balnutmin = 0.1 !: Fraction of phytoplankton loss to nutrient |
---|
43 | REAL(wp), PARAMETER :: r = 1 !: Reliability of model specific growth rate |
---|
44 | REAL(wp), PARAMETER :: beta_g = 0.05 !: Low rate bias correction for growth rate estimator |
---|
45 | REAL(wp), PARAMETER :: beta_l = 0.05 !: Low rate bias correction for primary loss rate estimator |
---|
46 | REAL(wp), PARAMETER :: beta_m = 0.05 !: Low rate bias correction for secondary loss rate estimator |
---|
47 | REAL(wp), PARAMETER :: a_g = 0.2 !: Error s.d. for log10 of growth rate estimator |
---|
48 | REAL(wp), PARAMETER :: a_l = 0.4 !: Error s.d. for log10 of primary loss rate estimator |
---|
49 | REAL(wp), PARAMETER :: a_m = 0.7 !: Error s.d. for log10 of secondary loss rate estimator |
---|
50 | REAL(wp), PARAMETER :: zfracb0 = 0.7 !: Base zooplankton fraction of loss to Z & D |
---|
51 | REAL(wp), PARAMETER :: zfracb1 = 0 !: Phytoplankton sensitivity of zooplankton fraction |
---|
52 | REAL(wp), PARAMETER :: qrfmax = 1.1 !: Maximum nutrient limitation reduction factor |
---|
53 | REAL(wp), PARAMETER :: qafmax = 1.1 !: Maximum nutrient limitation amplification factor |
---|
54 | REAL(wp), PARAMETER :: zrfmax = 2 !: Maximum zooplankton reduction factor |
---|
55 | REAL(wp), PARAMETER :: zafmax = 2 !: Maximum zooplankton amplification factor |
---|
56 | REAL(wp), PARAMETER :: prfmax = 10 !: Maximum phytoplankton reduction factor (secondary) |
---|
57 | REAL(wp), PARAMETER :: incphymin = 0.0001 !: Minimum size of non-zero phytoplankton increment |
---|
58 | REAL(wp), PARAMETER :: integnstep = 20 !: Number of steps for p.d.f. integral evaluation |
---|
59 | REAL(wp), PARAMETER :: pthreshold = 0.01 !: Fractional threshold level for setting p.d.f. |
---|
60 | ! |
---|
61 | LOGICAL, PARAMETER :: diag_active = .TRUE. !: Depth-independent diagnostics |
---|
62 | LOGICAL, PARAMETER :: diag_fulldepth_active = .TRUE. !: Full-depth diagnostics |
---|
63 | LOGICAL, PARAMETER :: gl_active = .TRUE. !: Growth/loss-based balancing |
---|
64 | LOGICAL, PARAMETER :: nbal_active = .TRUE. !: Nitrogen balancing |
---|
65 | LOGICAL, PARAMETER :: subsurf_active = .TRUE. !: Increments below MLD |
---|
66 | LOGICAL, PARAMETER :: deepneg_active = .FALSE. !: Negative primary increments below MLD |
---|
67 | LOGICAL, PARAMETER :: deeppos_active = .FALSE. !: Positive primary increments below MLD |
---|
68 | LOGICAL, PARAMETER :: nutprof_active = .TRUE. !: Secondary increments |
---|
69 | |
---|
70 | CONTAINS |
---|
71 | |
---|
72 | SUBROUTINE asm_logchl_bal_hadocc( logchl_bkginc, aincper, mld_choice_bgc, & |
---|
73 | & k_maxchlinc, ld_logchlbal, & |
---|
74 | & pgrow_avg_bkg, ploss_avg_bkg, & |
---|
75 | & phyt_avg_bkg, mld_max_bkg, & |
---|
76 | & logchl_balinc ) |
---|
77 | !!--------------------------------------------------------------------------- |
---|
78 | !! *** ROUTINE asm_logchl_bal_hadocc *** |
---|
79 | !! |
---|
80 | !! ** Purpose : calculate increments to HadOCC from logchl increments |
---|
81 | !! |
---|
82 | !! ** Method : convert logchl increments to chl increments |
---|
83 | !! call nitrogen balancing scheme |
---|
84 | !! |
---|
85 | !! ** Action : populate logchl_balinc |
---|
86 | !! |
---|
87 | !! References : Hemmings et al., 2008, J. Mar. Res. |
---|
88 | !! Ford et al., 2012, Ocean Sci. |
---|
89 | !!--------------------------------------------------------------------------- |
---|
90 | !! |
---|
91 | REAL(wp), INTENT(in ), DIMENSION(jpi,jpj) :: logchl_bkginc ! logchl increments |
---|
92 | REAL(wp), INTENT(in ) :: aincper ! Assimilation period |
---|
93 | INTEGER, INTENT(in ) :: mld_choice_bgc ! MLD criterion |
---|
94 | REAL(wp), INTENT(in ) :: k_maxchlinc ! Max chl increment |
---|
95 | LOGICAL, INTENT(in ) :: ld_logchlbal ! Balancing y/n |
---|
96 | REAL(wp), INTENT(in ), DIMENSION(jpi,jpj) :: pgrow_avg_bkg ! Avg phyto growth |
---|
97 | REAL(wp), INTENT(in ), DIMENSION(jpi,jpj) :: ploss_avg_bkg ! Avg phyto loss |
---|
98 | REAL(wp), INTENT(in ), DIMENSION(jpi,jpj) :: phyt_avg_bkg ! Avg phyto |
---|
99 | REAL(wp), INTENT(in ), DIMENSION(jpi,jpj) :: mld_max_bkg ! Max MLD |
---|
100 | REAL(wp), INTENT( out), DIMENSION(jpi,jpj,jpk,jptra) :: logchl_balinc ! Balancing increments |
---|
101 | !! |
---|
102 | INTEGER :: ji, jj, jk, jn ! Loop counters |
---|
103 | INTEGER :: jkmax ! Loop index |
---|
104 | INTEGER, DIMENSION(6) :: i_tracer ! Tracer indices |
---|
105 | REAL(wp), DIMENSION(jpi,jpj) :: chl_inc ! Chlorophyll increments |
---|
106 | REAL(wp), DIMENSION(jpi,jpj) :: zmld ! Mixed layer depth |
---|
107 | REAL(wp), DIMENSION(16) :: modparm ! Model parameters |
---|
108 | REAL(wp), DIMENSION(20) :: assimparm ! Assimilation parameters |
---|
109 | REAL(wp), DIMENSION(jpi,jpj,jpk,6) :: bstate ! Background state |
---|
110 | REAL(wp), DIMENSION(jpi,jpj,jpk,6) :: outincs ! Balancing increments |
---|
111 | REAL(wp), DIMENSION(jpi,jpj,22) :: diag ! Depth-indep diagnostics |
---|
112 | REAL(wp), DIMENSION(jpi,jpj,jpk,22) :: diag_fulldepth ! Full-depth diagnostics |
---|
113 | !!--------------------------------------------------------------------------- |
---|
114 | |
---|
115 | ! Convert log10(chlorophyll) increment back to a chlorophyll increment |
---|
116 | ! In order to transform logchl incs to chl incs, need to account for model |
---|
117 | ! background, cannot simply do 10^logchl_bkginc. Need to: |
---|
118 | ! 1) Add logchl inc to log10(background) to get log10(analysis) |
---|
119 | ! 2) Take 10^log10(analysis) to get analysis |
---|
120 | ! 3) Subtract background from analysis to get chl incs |
---|
121 | ! If k_maxchlinc > 0 then cap total absolute chlorophyll increment at that value |
---|
122 | DO jj = 1, jpj |
---|
123 | DO ji = 1, jpi |
---|
124 | IF ( HADOCC_CHL(ji,jj,1) > 0.0 ) THEN |
---|
125 | chl_inc(ji,jj) = 10**( LOG10( HADOCC_CHL(ji,jj,1) ) + logchl_bkginc(ji,jj) ) - HADOCC_CHL(ji,jj,1) |
---|
126 | IF ( k_maxchlinc > 0.0 ) THEN |
---|
127 | chl_inc(ji,jj) = MAX( -1.0 * k_maxchlinc, MIN( chl_inc(ji,jj), k_maxchlinc ) ) |
---|
128 | ENDIF |
---|
129 | ELSE |
---|
130 | chl_inc(ji,jj) = 0.0 |
---|
131 | ENDIF |
---|
132 | END DO |
---|
133 | END DO |
---|
134 | |
---|
135 | ! Select mixed layer |
---|
136 | SELECT CASE( mld_choice_bgc ) |
---|
137 | CASE ( 1 ) ! Turbocline/mixing depth [W points] |
---|
138 | zmld(:,:) = hmld(:,:) |
---|
139 | CASE ( 2 ) ! Density criterion (0.01 kg/m^3 change from 10m) [W points] |
---|
140 | zmld(:,:) = hmlp(:,:) |
---|
141 | CASE ( 3 ) ! Kara MLD [Interpolated] |
---|
142 | #if defined key_karaml |
---|
143 | IF ( ln_kara ) THEN |
---|
144 | zmld(:,:) = hmld_kara(:,:) |
---|
145 | ELSE |
---|
146 | CALL ctl_stop( ' Kara mixed layer requested for LogChl assimilation,', & |
---|
147 | & ' but ln_kara=.false.' ) |
---|
148 | ENDIF |
---|
149 | #else |
---|
150 | CALL ctl_stop( ' Kara mixed layer requested for LogChl assimilation,', & |
---|
151 | & ' but is not defined' ) |
---|
152 | #endif |
---|
153 | CASE ( 4 ) ! Temperature criterion (0.2 K change from surface) [T points] |
---|
154 | !zmld(:,:) = hmld_tref(:,:) |
---|
155 | CALL ctl_stop( ' hmld_tref mixed layer requested for LogChl assimilation,', & |
---|
156 | & ' but is not available in this version' ) |
---|
157 | CASE ( 5 ) ! Density criterion (0.01 kg/m^3 change from 10m) [T points] |
---|
158 | zmld(:,:) = hmlpt(:,:) |
---|
159 | END SELECT |
---|
160 | |
---|
161 | IF ( ld_logchlbal ) THEN ! Nitrogen balancing |
---|
162 | |
---|
163 | ! Set up model parameters to be passed into Hemmings balancing routine |
---|
164 | modparm(1) = grow_sat |
---|
165 | modparm(2) = psmax |
---|
166 | modparm(3) = par |
---|
167 | modparm(4) = alpha |
---|
168 | modparm(5) = resp_rate |
---|
169 | modparm(6) = pmort_rate |
---|
170 | modparm(7) = phyto_min |
---|
171 | modparm(8) = z_mort_1 |
---|
172 | modparm(9) = z_mort_2 |
---|
173 | modparm(10) = c2n_p |
---|
174 | modparm(11) = c2n_z |
---|
175 | modparm(12) = c2n_d |
---|
176 | modparm(13) = graze_threshold |
---|
177 | modparm(14) = holling_coef |
---|
178 | modparm(15) = graze_sat |
---|
179 | modparm(16) = graze_max |
---|
180 | |
---|
181 | ! Set up assimilation parameters to be passed into balancing routine |
---|
182 | ! Not sure what assimparm(1) is meant to be, but it doesn't get used |
---|
183 | assimparm(2) = balnutext |
---|
184 | assimparm(3) = balnutmin |
---|
185 | assimparm(4) = r |
---|
186 | assimparm(5) = beta_g |
---|
187 | assimparm(6) = beta_l |
---|
188 | assimparm(7) = beta_m |
---|
189 | assimparm(8) = a_g |
---|
190 | assimparm(9) = a_l |
---|
191 | assimparm(10) = a_m |
---|
192 | assimparm(11) = zfracb0 |
---|
193 | assimparm(12) = zfracb1 |
---|
194 | assimparm(13) = qrfmax |
---|
195 | assimparm(14) = qafmax |
---|
196 | assimparm(15) = zrfmax |
---|
197 | assimparm(16) = zafmax |
---|
198 | assimparm(17) = prfmax |
---|
199 | assimparm(18) = incphymin |
---|
200 | assimparm(19) = integnstep |
---|
201 | assimparm(20) = pthreshold |
---|
202 | |
---|
203 | ! Set up external tracer indices array bstate |
---|
204 | i_tracer(1) = 1 ! nutrient |
---|
205 | i_tracer(2) = 2 ! phytoplankton |
---|
206 | i_tracer(3) = 3 ! zooplankton |
---|
207 | i_tracer(4) = 4 ! detritus |
---|
208 | i_tracer(5) = 5 ! DIC |
---|
209 | i_tracer(6) = 6 ! Alkalinity |
---|
210 | |
---|
211 | ! Set background state |
---|
212 | bstate(:,:,:,i_tracer(1)) = trb(:,:,:,jp_had_nut) |
---|
213 | bstate(:,:,:,i_tracer(2)) = trb(:,:,:,jp_had_phy) |
---|
214 | bstate(:,:,:,i_tracer(3)) = trb(:,:,:,jp_had_zoo) |
---|
215 | bstate(:,:,:,i_tracer(4)) = trb(:,:,:,jp_had_pdn) |
---|
216 | bstate(:,:,:,i_tracer(5)) = trb(:,:,:,jp_had_dic) |
---|
217 | bstate(:,:,:,i_tracer(6)) = trb(:,:,:,jp_had_alk) |
---|
218 | |
---|
219 | ! Call nitrogen balancing routine |
---|
220 | CALL bio_analysis( jpi, jpj, jpk, ZDZ(:,:,:), i_tracer, modparm, & |
---|
221 | & n2be_p, n2be_z, n2be_d, assimparm, & |
---|
222 | & INT(aincper), 1, kmt(:,:), tmask(:,:,:), & |
---|
223 | & zmld(:,:), mld_max_bkg(:,:), chl_inc(:,:), cchl_p(:,:,1), & |
---|
224 | & nbal_active, phyt_avg_bkg(:,:), & |
---|
225 | & gl_active, pgrow_avg_bkg(:,:), ploss_avg_bkg(:,:), & |
---|
226 | & subsurf_active, deepneg_active, & |
---|
227 | & deeppos_active, nutprof_active, & |
---|
228 | & bstate, outincs, & |
---|
229 | & diag_active, diag, & |
---|
230 | & diag_fulldepth_active, diag_fulldepth ) |
---|
231 | |
---|
232 | ! Save balancing increments |
---|
233 | logchl_balinc(:,:,:,jp_had_nut) = outincs(:,:,:,i_tracer(1)) |
---|
234 | logchl_balinc(:,:,:,jp_had_phy) = outincs(:,:,:,i_tracer(2)) |
---|
235 | logchl_balinc(:,:,:,jp_had_zoo) = outincs(:,:,:,i_tracer(3)) |
---|
236 | logchl_balinc(:,:,:,jp_had_pdn) = outincs(:,:,:,i_tracer(4)) |
---|
237 | logchl_balinc(:,:,:,jp_had_dic) = outincs(:,:,:,i_tracer(5)) |
---|
238 | logchl_balinc(:,:,:,jp_had_alk) = outincs(:,:,:,i_tracer(6)) |
---|
239 | |
---|
240 | ELSE ! No nitrogen balancing |
---|
241 | |
---|
242 | ! Initialise phytoplankton increment to zero |
---|
243 | logchl_balinc(:,:,:,jp_had_phy) = 0.0 |
---|
244 | |
---|
245 | ! Convert surface chlorophyll increment to phytoplankton nitrogen |
---|
246 | logchl_balinc(:,:,1,jp_had_phy) = ( cchl_p(:,:,1) / (mw_carbon * c2n_p) ) * chl_inc(:,:) |
---|
247 | |
---|
248 | ! Propagate through mixed layer |
---|
249 | DO jj = 1, jpj |
---|
250 | DO ji = 1, jpi |
---|
251 | ! |
---|
252 | jkmax = jpk-1 |
---|
253 | DO jk = jpk-1, 1, -1 |
---|
254 | IF ( ( zmld(ji,jj) > gdepw_n(ji,jj,jk) ) .AND. & |
---|
255 | & ( zmld(ji,jj) <= gdepw_n(ji,jj,jk+1) ) ) THEN |
---|
256 | zmld(ji,jj) = gdepw_n(ji,jj,jk+1) |
---|
257 | jkmax = jk |
---|
258 | ENDIF |
---|
259 | END DO |
---|
260 | ! |
---|
261 | DO jk = 2, jkmax |
---|
262 | logchl_balinc(ji,jj,jk,jp_had_phy) = logchl_balinc(ji,jj,1,jp_had_phy) |
---|
263 | END DO |
---|
264 | ! |
---|
265 | END DO |
---|
266 | END DO |
---|
267 | |
---|
268 | ! Set other balancing increments to zero |
---|
269 | logchl_balinc(:,:,:,jp_had_nut) = 0.0 |
---|
270 | logchl_balinc(:,:,:,jp_had_zoo) = 0.0 |
---|
271 | logchl_balinc(:,:,:,jp_had_pdn) = 0.0 |
---|
272 | logchl_balinc(:,:,:,jp_had_dic) = 0.0 |
---|
273 | logchl_balinc(:,:,:,jp_had_alk) = 0.0 |
---|
274 | |
---|
275 | ENDIF |
---|
276 | |
---|
277 | END SUBROUTINE asm_logchl_bal_hadocc |
---|
278 | |
---|
279 | #else |
---|
280 | !!---------------------------------------------------------------------- |
---|
281 | !! Default option : Empty routine |
---|
282 | !!---------------------------------------------------------------------- |
---|
283 | CONTAINS |
---|
284 | SUBROUTINE asm_logchl_bal_hadocc( logchl_bkginc, aincper, mld_choice_bgc, & |
---|
285 | & k_maxchlinc, logchl_balinc ) |
---|
286 | REAL :: logchl_bkginc(:,:) |
---|
287 | REAL :: aincper |
---|
288 | INTEGER :: mld_choice_bgc |
---|
289 | REAL :: k_maxchlinc |
---|
290 | REAL( :: logchl_balinc(:,:,:,:) |
---|
291 | WRITE(*,*) 'asm_logchl_bal_hadocc: You should not have seen this print! error?' |
---|
292 | END SUBROUTINE asm_logchl_bal_hadocc |
---|
293 | #endif |
---|
294 | |
---|
295 | !!====================================================================== |
---|
296 | END MODULE asmlogchlbal_hadocc |
---|