1 |
jmc |
1.6 |
C $Header: $ |
2 |
|
|
C $Name: $ |
3 |
|
|
|
4 |
edhill |
1.4 |
#include "DIC_OPTIONS.h" |
5 |
stephd |
1.1 |
#include "PTRACERS_OPTIONS.h" |
6 |
|
|
#include "GCHEM_OPTIONS.h" |
7 |
|
|
|
8 |
stephd |
1.5 |
CBOP |
9 |
|
|
C !ROUTINE: DIC_SURFFORCING |
10 |
|
|
|
11 |
|
|
C !INTERFACE: ========================================================== |
12 |
stephd |
1.1 |
SUBROUTINE DIC_SURFFORCING( PTR_CO2 , GDC, |
13 |
|
|
I bi,bj,imin,imax,jmin,jmax, |
14 |
|
|
I myIter,myTime,myThid) |
15 |
|
|
|
16 |
stephd |
1.5 |
C !DESCRIPTION: |
17 |
|
|
C Calculate the carbon air-sea flux terms |
18 |
|
|
C following external_forcing_dic.F (OCMIP run) from Mick |
19 |
|
|
|
20 |
|
|
C !USES: =============================================================== |
21 |
stephd |
1.1 |
IMPLICIT NONE |
22 |
|
|
#include "SIZE.h" |
23 |
|
|
#include "DYNVARS.h" |
24 |
|
|
#include "EEPARAMS.h" |
25 |
|
|
#include "PARAMS.h" |
26 |
|
|
#include "GRID.h" |
27 |
|
|
#include "FFIELDS.h" |
28 |
|
|
#include "DIC_ABIOTIC.h" |
29 |
|
|
#ifdef DIC_BIOTIC |
30 |
jmc |
1.6 |
#include "PTRACERS_SIZE.h" |
31 |
stephd |
1.1 |
#include "PTRACERS.h" |
32 |
|
|
#endif |
33 |
|
|
|
34 |
stephd |
1.5 |
C !INPUT PARAMETERS: =================================================== |
35 |
|
|
C myThid :: thread number |
36 |
|
|
C myIter :: current timestep |
37 |
|
|
C myTime :: current time |
38 |
|
|
c PTR_CO2 :: DIC tracer field |
39 |
stephd |
1.1 |
INTEGER myIter, myThid |
40 |
|
|
_RL myTime |
41 |
|
|
_RL PTR_CO2(1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr) |
42 |
stephd |
1.5 |
INTEGER iMin,iMax,jMin,jMax, bi, bj |
43 |
|
|
|
44 |
|
|
C !OUTPUT PARAMETERS: =================================================== |
45 |
|
|
c GDC :: tendency term due to air-sea exchange |
46 |
stephd |
1.1 |
_RL GDC(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
47 |
|
|
|
48 |
|
|
#ifdef ALLOW_PTRACERS |
49 |
stephd |
1.5 |
|
50 |
|
|
C !LOCAL VARIABLES: ==================================================== |
51 |
stephd |
1.2 |
INTEGER I,J, kLev, it |
52 |
stephd |
1.1 |
C Number of iterations for pCO2 solvers... |
53 |
|
|
C Solubility relation coefficients |
54 |
|
|
_RL SchmidtNoDIC(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
55 |
|
|
_RL pCO2sat(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
56 |
|
|
_RL Kwexch(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
57 |
|
|
C local variables for carbon chem |
58 |
|
|
_RL surfalk(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
59 |
|
|
_RL surfphos(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
60 |
|
|
_RL surfsi(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
61 |
|
|
_RL VirtualFlux(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
62 |
stephd |
1.5 |
CEOP |
63 |
stephd |
1.1 |
|
64 |
|
|
cccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccc |
65 |
|
|
|
66 |
|
|
kLev=1 |
67 |
|
|
|
68 |
|
|
C PRE-INDUSTRIAL STEADY STATE pCO2 = 278.0 ppmv |
69 |
|
|
DO j=1-OLy,sNy+OLy |
70 |
|
|
DO i=1-OLx,sNx+OLx |
71 |
|
|
AtmospCO2(i,j,bi,bj)=278.0d-6 |
72 |
|
|
ENDDO |
73 |
|
|
ENDDO |
74 |
|
|
|
75 |
|
|
|
76 |
|
|
C ================================================================= |
77 |
|
|
C determine inorganic carbon chem coefficients |
78 |
|
|
DO j=1-OLy,sNy+OLy |
79 |
|
|
DO i=1-OLx,sNx+OLx |
80 |
|
|
|
81 |
|
|
#ifdef DIC_BIOTIC |
82 |
|
|
cQQQQ check ptracer numbers |
83 |
|
|
surfalk(i,j) = PTRACER(i,j,klev,bi,bj,2) |
84 |
|
|
& * maskC(i,j,kLev,bi,bj) |
85 |
|
|
surfphos(i,j) = PTRACER(i,j,klev,bi,bj,3) |
86 |
|
|
& * maskC(i,j,kLev,bi,bj) |
87 |
|
|
#else |
88 |
|
|
surfalk(i,j) = 2.366595 * salt(i,j,kLev,bi,bj)/gsm_s |
89 |
|
|
& * maskC(i,j,kLev,bi,bj) |
90 |
|
|
surfphos(i,j) = 5.1225e-4 * maskC(i,j,kLev,bi,bj) |
91 |
|
|
#endif |
92 |
|
|
C FOR NON-INTERACTIVE Si |
93 |
stephd |
1.3 |
surfsi(i,j) = SILICA(i,j,bi,bj) * maskC(i,j,kLev,bi,bj) |
94 |
stephd |
1.1 |
ENDDO |
95 |
|
|
ENDDO |
96 |
|
|
|
97 |
|
|
CALL CARBON_COEFFS( |
98 |
|
|
I theta,salt, |
99 |
|
|
I bi,bj,iMin,iMax,jMin,jMax) |
100 |
|
|
C==================================================================== |
101 |
|
|
|
102 |
|
|
c pCO2 solver... |
103 |
stephd |
1.3 |
C$TAF LOOP = parallel |
104 |
stephd |
1.1 |
DO j=1-OLy,sNy+OLy |
105 |
stephd |
1.3 |
C$TAF LOOP = parallel |
106 |
stephd |
1.1 |
DO i=1-OLx,sNx+OLx |
107 |
|
|
|
108 |
|
|
IF(maskC(i,j,kLev,bi,bj) .NE. 0.)THEN |
109 |
|
|
CALL CALC_PCO2_APPROX( |
110 |
|
|
I theta(i,j,kLev,bi,bj),salt(i,j,kLev,bi,bj), |
111 |
|
|
I PTR_CO2(i,j,kLev), surfphos(i,j), |
112 |
|
|
I surfsi(i,j),surfalk(i,j), |
113 |
|
|
I ak1(i,j,bi,bj),ak2(i,j,bi,bj), |
114 |
|
|
I ak1p(i,j,bi,bj),ak2p(i,j,bi,bj),ak3p(i,j,bi,bj), |
115 |
|
|
I aks(i,j,bi,bj),akb(i,j,bi,bj),akw(i,j,bi,bj), |
116 |
|
|
I aksi(i,j,bi,bj),akf(i,j,bi,bj),ff(i,j,bi,bj), |
117 |
|
|
I bt(i,j,bi,bj),st(i,j,bi,bj),ft(i,j,bi,bj), |
118 |
|
|
U pH(i,j,bi,bj),pCO2(i,j,bi,bj) ) |
119 |
|
|
ELSE |
120 |
|
|
pCO2(i,j,bi,bj)=0. _d 0 |
121 |
|
|
END IF |
122 |
|
|
ENDDO |
123 |
|
|
ENDDO |
124 |
|
|
|
125 |
|
|
DO j=1-OLy,sNy+OLy |
126 |
|
|
DO i=1-OLx,sNx+OLx |
127 |
|
|
|
128 |
|
|
IF (maskC(i,j,kLev,bi,bj).NE.0.) THEN |
129 |
|
|
C calculate SCHMIDT NO. for CO2 |
130 |
|
|
SchmidtNoDIC(i,j) = |
131 |
|
|
& sca1 |
132 |
|
|
& + sca2 * theta(i,j,kLev,bi,bj) |
133 |
|
|
& + sca3 * theta(i,j,kLev,bi,bj)*theta(i,j,kLev,bi,bj) |
134 |
|
|
& + sca4 * theta(i,j,kLev,bi,bj)*theta(i,j,kLev,bi,bj) |
135 |
|
|
& *theta(i,j,kLev,bi,bj) |
136 |
|
|
|
137 |
|
|
C Determine surface flux (FDIC) |
138 |
|
|
C first correct pCO2at for surface atmos pressure |
139 |
|
|
pCO2sat(i,j) = |
140 |
|
|
& AtmosP(i,j,bi,bj)*AtmospCO2(i,j,bi,bj) |
141 |
|
|
c find exchange coefficient |
142 |
|
|
c account for schmidt number and and varible piston velocity |
143 |
|
|
Kwexch(i,j) = |
144 |
|
|
& pisvel(i,j,bi,bj) |
145 |
|
|
& / sqrt(SchmidtNoDIC(i,j)/660.0) |
146 |
|
|
c OR use a constant coeff |
147 |
|
|
c Kwexch(i,j) = 5e-5 |
148 |
|
|
c ice influence |
149 |
|
|
cQQ Kwexch(i,j) =(1.d0-Fice(i,j,bi,bj))*Kwexch(i,j) |
150 |
|
|
|
151 |
|
|
|
152 |
|
|
C Calculate flux in terms of DIC units using K0, solubility |
153 |
|
|
C Flux = Vp * ([CO2sat] - [CO2]) |
154 |
|
|
C CO2sat = K0*pCO2atmos*P/P0 |
155 |
|
|
C Converting pCO2 to [CO2] using ff, as in CALC_PCO2 |
156 |
stephd |
1.2 |
FluxCO2(i,j,bi,bj) = |
157 |
stephd |
1.1 |
& maskC(i,j,kLev,bi,bj)*Kwexch(i,j)*( |
158 |
|
|
& ak0(i,j,bi,bj)*pCO2sat(i,j) - |
159 |
|
|
& ff(i,j,bi,bj)*pCO2(i,j,bi,bj) |
160 |
|
|
& ) |
161 |
|
|
ELSE |
162 |
stephd |
1.2 |
FluxCO2(i,j,bi,bj) = 0. |
163 |
stephd |
1.1 |
ENDIF |
164 |
|
|
C convert flux (mol kg-1 m s-1) to (mol m-2 s-1) |
165 |
stephd |
1.2 |
FluxCO2(i,j,bi,bj) = FluxCO2(i,j,bi,bj)/permil |
166 |
stephd |
1.1 |
|
167 |
|
|
IF (maskC(i,j,kLev,bi,bj).NE.0.) THEN |
168 |
|
|
c calculate virtual flux |
169 |
|
|
c EminusPforV = dS/dt*(1/Sglob) |
170 |
|
|
C NOTE: Be very careful with signs here! |
171 |
|
|
C Positive EminusPforV => loss of water to atmos and increase |
172 |
|
|
C in salinity. Thus, also increase in other surface tracers |
173 |
|
|
C (i.e. positive virtual flux into surface layer) |
174 |
|
|
C ...so here, VirtualFLux = dC/dt! |
175 |
|
|
VirtualFlux(i,j)=gsm_DIC*surfaceTendencyS(i,j,bi,bj)/gsm_s |
176 |
|
|
c OR |
177 |
|
|
c let virtual flux be zero |
178 |
|
|
c VirtualFlux(i,j)=0.d0 |
179 |
|
|
c |
180 |
|
|
ELSE |
181 |
|
|
VirtualFlux(i,j)=0. _d 0 |
182 |
|
|
ENDIF |
183 |
|
|
ENDDO |
184 |
|
|
ENDDO |
185 |
|
|
|
186 |
|
|
C update tendency |
187 |
|
|
DO j=1-OLy,sNy+OLy |
188 |
|
|
DO i=1-OLx,sNx+OLx |
189 |
|
|
GDC(i,j)= maskC(i,j,kLev,bi,bj)*( |
190 |
stephd |
1.2 |
& FluxCO2(i,j,bi,bj)*recip_drF(kLev) |
191 |
stephd |
1.1 |
& + VirtualFlux(i,j) |
192 |
|
|
& ) |
193 |
|
|
ENDDO |
194 |
|
|
ENDDO |
195 |
|
|
|
196 |
|
|
#endif |
197 |
|
|
RETURN |
198 |
|
|
END |