/[MITgcm]/MITgcm_contrib/ecco_darwin/v4_3deg/code/dic_budgetDic.F
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Contents of /MITgcm_contrib/ecco_darwin/v4_3deg/code/dic_budgetDic.F

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Revision 1.2 - (show annotations) (download)
Mon Jan 27 06:31:50 2020 UTC (6 years, 7 months ago) by dimitri
Branch: MAIN
CVS Tags: HEAD
Changes since 1.1: +0 -0 lines
FILE REMOVED
where possible, using code and input files from va_llc270

1 #include "CPP_OPTIONS.h"
2 #include "PTRACERS_OPTIONS.h"
3 #include "DARWIN_OPTIONS.h"
4
5 #ifdef ALLOW_PTRACERS
6 #ifdef ALLOW_DARWIN
7
8 #ifdef ALLOW_CARBON
9
10 CBOP
11 C !ROUTINE: DIC_BUDGETDIC
12
13 C !INTERFACE: ==========================================================
14 SUBROUTINE DIC_BUDGETDIC( PTR_DIC , PTR_ALK, PTR_PO4, PTR_SIL,
15 O deltaDic,
16 I bi,bj,imin,imax,jmin,jmax,
17 I myIter,myTime,myThid)
18
19 C !DESCRIPTION:
20 C Calculate the carbon air-sea flux terms
21 C following external_forcing_dic.F (OCMIP run) from Mick
22
23 C !USES: ===============================================================
24 IMPLICIT NONE
25 #include "SIZE.h"
26 #include "DYNVARS.h"
27 #include "EEPARAMS.h"
28 #include "PARAMS.h"
29 #include "GRID.h"
30 #include "FFIELDS.h"
31 #include "DARWIN_SIZE.h"
32 #include "DARWIN_IO.h"
33 #include "DARWIN_FLUX.h"
34 #ifdef USE_EXFWIND
35 #include "EXF_FIELDS.h"
36 #endif
37
38 C !INPUT PARAMETERS: ===================================================
39 C myThid :: thread number
40 C myIter :: current timestep
41 C myTime :: current time
42 c PTR_DIC :: DIC tracer field
43 INTEGER myIter, myThid
44 _RL myTime
45 _RL PTR_DIC(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
46 _RL PTR_ALK(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
47 _RL PTR_PO4(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
48 _RL PTR_SIL(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
49 INTEGER iMin,iMax,jMin,jMax, bi, bj
50
51 C !LOCAL VARIABLES: ====================================================
52 INTEGER I,J, kLev, it
53 C Number of iterations for pCO2 solvers...
54 C Solubility relation coefficients
55 _RL SchmidtNoDIC(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
56 _RL pCO2sat(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
57 _RL Kwexch(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
58 _RL pisvel(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
59 C local variables for carbon chem
60 _RL surfdic(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
61 _RL surfalk(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
62 _RL surfphos(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
63 _RL surfsi(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
64 _RL surfsalt(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
65 _RL surftemp(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
66 _RL budgetDicPert(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
67 #ifdef ALLOW_OLD_VIRTUALFLUX
68 _RL VirtualFlux(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
69 #endif
70 C local variables for CO2_FLUX_BUDGET
71 _RL deltaDic(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
72 CEOP
73
74 cccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccc
75
76 kLev=1
77
78 cc if coupled to atmsopheric model, use the
79 cc Co2 value passed from the coupler
80 c#ifndef USE_ATMOSCO2
81 cC PRE-INDUSTRIAL STEADY STATE pCO2 = 278.0 ppmv
82 c DO j=1-OLy,sNy+OLy
83 c DO i=1-OLx,sNx+OLx
84 c AtmospCO2(i,j,bi,bj)=278.0 _d -6
85 c ENDDO
86 c ENDDO
87 c#endif
88 C =================================================================
89 C determine inorganic carbon chem coefficients
90 DO j=jmin,jmax
91 DO i=imin,imax
92 c put bounds on tracers so pH solver doesn't blow up
93 surfdic(i,j) =
94 & max(100. _d 0 , min(4000. _d 0, PTR_DIC(i,j)))*1e-3
95 & * maskC(i,j,kLev,bi,bj)
96 surfalk(i,j) =
97 & max(100. _d 0 , min(4000. _d 0, PTR_ALK(i,j)))*1e-3
98 & * maskC(i,j,kLev,bi,bj)
99 surfphos(i,j) =
100 & max(1. _d -10, min(10. _d 0, PTR_PO4(i,j)))*1e-3
101 & * maskC(i,j,kLev,bi,bj)
102 surfsi(i,j) =
103 & max(1. _d -8, min(500. _d 0, PTR_SIL(i,j)))*1e-3
104 & * maskC(i,j,kLev,bi,bj)
105 surfsalt(i,j) =
106 & max(4. _d 0, min(50. _d 0, salt(i,j,kLev,bi,bj)))
107 surftemp(i,j) =
108 & max(-4. _d 0, min(39. _d 0, theta(i,j,kLev,bi,bj)))
109 budgetDicPert(i,j) = surfdic(i,j) + budgetPert
110 ENDDO
111 ENDDO
112
113 CALL CARBON_COEFFS(
114 I surftemp,surfsalt,
115 I bi,bj,iMin,iMax,jMin,jMax,myThid)
116 C====================================================================
117
118 DO j=jmin,jmax
119 DO i=imin,imax
120 C Compute AtmosP and Kwexch_Pre which are re-used for flux of O2
121
122 #ifdef USE_PLOAD
123 C Convert anomalous pressure pLoad (in Pa) from atmospheric model
124 C to total pressure (in Atm)
125 C Note: it is assumed the reference atmospheric pressure is 1Atm=1013mb
126 C rather than the actual ref. pressure from Atm. model so that on
127 C average AtmosP is about 1 Atm.
128 AtmosP(i,j,bi,bj)= 1. _d 0 + pLoad(i,j,bi,bj)/Pa2Atm
129 #endif
130
131 C Pre-compute part of exchange coefficient: pisvel*(1-fice)
132 C Schmidt number is accounted for later
133 #ifdef USE_EXFWIND
134 pisvel(i,j)=0.337 _d 0 *wspeed(i,j,bi,bj)**2/3.6 _d 5
135 cBX linear piston velocity after Krakauer et al. (2006), Eq. 3
136 cBX using <k> = 20, n=0.5, and <u^n> = 2.6747 (as determined from 2010
137 cBX EXFwspee field from cube92 run)
138 cDc pisvel(i,j)=20 _d 0 *(wspeed(i,j,bi,bj)**0.5
139 cDc & /2.6747 _d 0) /3.6 _d 5
140 #else
141 pisvel(i,j)=0.337 _d 0 *wind(i,j,bi,bj)**2/3.6 _d 5
142 #endif
143 Kwexch_Pre(i,j,bi,bj) = pisvel(i,j)
144 & * (1. _d 0 - FIce(i,j,bi,bj))
145
146 ENDDO
147 ENDDO
148
149 c pCO2 solver...
150 C$TAF LOOP = parallel
151 DO j=jmin,jmax
152 C$TAF LOOP = parallel
153 DO i=imin,imax
154
155 IF ( maskC(i,j,kLev,bi,bj).NE.0. _d 0 ) THEN
156 CALL CALC_PCO2_APPROX(
157 I surftemp(i,j),surfsalt(i,j),
158 I budgetDicPert(i,j), surfphos(i,j),
159 I surfsi(i,j),surfalk(i,j),
160 I ak1(i,j,bi,bj),ak2(i,j,bi,bj),
161 I ak1p(i,j,bi,bj),ak2p(i,j,bi,bj),ak3p(i,j,bi,bj),
162 I aks(i,j,bi,bj),akb(i,j,bi,bj),akw(i,j,bi,bj),
163 I aksi(i,j,bi,bj),akf(i,j,bi,bj),
164 I ak0(i,j,bi,bj), fugf(i,j,bi,bj),
165 I ff(i,j,bi,bj),
166 I bt(i,j,bi,bj),st(i,j,bi,bj),ft(i,j,bi,bj),
167 U pH(i,j,bi,bj),pCO2(i,j,bi,bj),CO3(i,j,bi,bj),
168 I myThid )
169 ELSE
170 pH(i,j,bi,bj) = 0. _d 0
171 pCO2(i,j,bi,bj) = 0. _d 0
172 CO3(i,j,bi,bj) = 0. _d 0
173 ENDIF
174 ENDDO
175 ENDDO
176
177 C update tendency
178 DO j=jmin,jmax
179 DO i=imin,imax
180 if(budgetTStep1.EQ.0) then
181 C if first timestep
182 C this is problematic at restart; clean-up later
183 deltaDic(i,j) = 0. _d 0
184 previousDic(i,j,bi,bj) = surfdic(i,j)
185 else
186 C current value - value from last timestep
187 deltaDic(i,j) = surfdic(i,j) - previousDic(i,j,bi,bj)
188 previousDic(i,j,bi,bj) = surfdic(i,j)
189 endif
190 ENDDO
191 ENDDO
192
193 RETURN
194 END
195 #endif /*ALLOW_CARBON*/
196
197 #endif /*DARWIN*/
198 #endif /*ALLOW_PTRACERS*/
199 c ==================================================================

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