/[MITgcm]/MITgcm/pkg/dic/dic_surfforcing.F
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revision 1.9 by stephd, Thu Aug 25 22:32:44 2005 UTC revision 1.15 by dfer, Tue Aug 14 19:32:40 2007 UTC
# Line 9  CBOP Line 9  CBOP
9  C !ROUTINE: DIC_SURFFORCING  C !ROUTINE: DIC_SURFFORCING
10    
11  C !INTERFACE: ==========================================================  C !INTERFACE: ==========================================================
12        SUBROUTINE DIC_SURFFORCING( PTR_CO2 , GDC,        SUBROUTINE DIC_SURFFORCING( PTR_CO2 , PTR_ALK, PTR_PO4, GDC,
13       I           bi,bj,imin,imax,jmin,jmax,       I           bi,bj,imin,imax,jmin,jmax,
14       I           myIter,myTime,myThid)       I           myIter,myTime,myThid)
15    
# Line 26  C !USES: =============================== Line 26  C !USES: ===============================
26  #include "GRID.h"  #include "GRID.h"
27  #include "FFIELDS.h"  #include "FFIELDS.h"
28  #include "DIC_ABIOTIC.h"  #include "DIC_ABIOTIC.h"
 #ifdef DIC_BIOTIC  
 #include "PTRACERS_SIZE.h"  
 #include "PTRACERS.h"  
 #endif  
29    
30  C !INPUT PARAMETERS: ===================================================  C !INPUT PARAMETERS: ===================================================
31  C  myThid               :: thread number  C  myThid               :: thread number
# Line 39  c  PTR_CO2              :: DIC tracer fi Line 35  c  PTR_CO2              :: DIC tracer fi
35        INTEGER myIter, myThid        INTEGER myIter, myThid
36        _RL myTime        _RL myTime
37        _RL  PTR_CO2(1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr)        _RL  PTR_CO2(1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr)
38          _RL  PTR_ALK(1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr)
39          _RL  PTR_PO4(1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr)
40        INTEGER iMin,iMax,jMin,jMax, bi, bj        INTEGER iMin,iMax,jMin,jMax, bi, bj
41    
42  C !OUTPUT PARAMETERS: ===================================================  C !OUTPUT PARAMETERS: ===================================================
# Line 65  cccccccccccccccccccccccccccccccccccccccc Line 63  cccccccccccccccccccccccccccccccccccccccc
63    
64        kLev=1        kLev=1
65    
66    c if coupled to atmsopheric model, use the
67    c Co2 value passed from the coupler
68    #ifndef USE_ATMOSCO2
69  C PRE-INDUSTRIAL STEADY STATE pCO2 = 278.0 ppmv  C PRE-INDUSTRIAL STEADY STATE pCO2 = 278.0 ppmv
70         DO j=1-OLy,sNy+OLy         DO j=1-OLy,sNy+OLy
71          DO i=1-OLx,sNx+OLx          DO i=1-OLx,sNx+OLx
72             AtmospCO2(i,j,bi,bj)=278.0d-6             AtmospCO2(i,j,bi,bj)=278.0 _d -6
73          ENDDO          ENDDO
74         ENDDO         ENDDO
75    #endif
76    
77    
78  C =================================================================  C =================================================================
79  C determine inorganic carbon chem coefficients  C determine inorganic carbon chem coefficients
80          DO j=1-OLy,sNy+OLy          DO j=jmin,jmax
81           DO i=1-OLx,sNx+OLx           DO i=imin,imax
82    
83  #ifdef DIC_BIOTIC  #ifdef DIC_BIOTIC
84  cQQQQ check ptracer numbers  cQQQQ check ptracer numbers
85               surfalk(i,j) = PTRACER(i,j,klev,bi,bj,2)               surfalk(i,j) = PTR_ALK(i,j,klev)
86       &                          * maskC(i,j,kLev,bi,bj)       &                          * maskC(i,j,kLev,bi,bj)
87               surfphos(i,j)  = PTRACER(i,j,klev,bi,bj,3)               surfphos(i,j)  = PTR_PO4(i,j,klev)
88       &                          * maskC(i,j,kLev,bi,bj)       &                          * maskC(i,j,kLev,bi,bj)
89  #else  #else
90               surfalk(i,j) = 2.366595 * salt(i,j,kLev,bi,bj)/gsm_s               surfalk(i,j) = 2.366595 _d 0 * salt(i,j,kLev,bi,bj)/gsm_s
91       &                          * maskC(i,j,kLev,bi,bj)       &                          * maskC(i,j,kLev,bi,bj)
92               surfphos(i,j)  = 5.1225e-4 * maskC(i,j,kLev,bi,bj)               surfphos(i,j)  = 5.1225 _d -4 * maskC(i,j,kLev,bi,bj)
93  #endif  #endif
94  C FOR NON-INTERACTIVE Si  C FOR NON-INTERACTIVE Si
95               surfsi(i,j)   = SILICA(i,j,bi,bj) * maskC(i,j,kLev,bi,bj)               surfsi(i,j)   = SILICA(i,j,bi,bj) * maskC(i,j,kLev,bi,bj)
# Line 101  C======================================= Line 103  C=======================================
103    
104  c pCO2 solver...  c pCO2 solver...
105  C$TAF LOOP = parallel  C$TAF LOOP = parallel
106         DO j=1-OLy,sNy+OLy         DO j=jmin,jmax
107  C$TAF LOOP = parallel  C$TAF LOOP = parallel
108          DO i=1-OLx,sNx+OLx          DO i=imin,imax
109    
110            IF(maskC(i,j,kLev,bi,bj) .NE. 0.)THEN            IF(maskC(i,j,kLev,bi,bj) .NE. 0.)THEN
111              CALL CALC_PCO2_APPROX(              CALL CALC_PCO2_APPROX(
# Line 122  C$TAF LOOP = parallel Line 124  C$TAF LOOP = parallel
124          ENDDO          ENDDO
125         ENDDO         ENDDO
126    
127         DO j=1-OLy,sNy+OLy         DO j=jmin,jmax
128          DO i=1-OLx,sNx+OLx          DO i=imin,imax
129    
130              IF (maskC(i,j,kLev,bi,bj).NE.0.) THEN              IF (maskC(i,j,kLev,bi,bj).NE.0.) THEN
131  C calculate SCHMIDT NO. for CO2  C calculate SCHMIDT NO. for CO2
# Line 134  C calculate SCHMIDT NO. for CO2 Line 136  C calculate SCHMIDT NO. for CO2
136       &          + sca4 * theta(i,j,kLev,bi,bj)*theta(i,j,kLev,bi,bj)       &          + sca4 * theta(i,j,kLev,bi,bj)*theta(i,j,kLev,bi,bj)
137       &                *theta(i,j,kLev,bi,bj)       &                *theta(i,j,kLev,bi,bj)
138    
139    c
140    #ifdef USE_PLOAD
141    C Convert anomalous pressure pLoad (in Pa) from atmospheric model
142    C to total pressure (in Atm)
143    C Note: it is assumed the reference atmospheric pressure is 1Atm=1013mb
144    C       rather than the actual ref. pressure from Atm. model so that on
145    C       average AtmosP is about 1 Atm.
146                    AtmosP(i,j,bi,bj)= 1. _d 0 + pLoad(i,j,bi,bj)/Pa2Atm
147    #endif
148    
149  C Determine surface flux (FDIC)  C Determine surface flux (FDIC)
150  C first correct pCO2at for surface atmos pressure  C first correct pCO2at for surface atmos pressure
151                pCO2sat(i,j) =                pCO2sat(i,j) =
152       &          AtmosP(i,j,bi,bj)*AtmospCO2(i,j,bi,bj)       &          AtmosP(i,j,bi,bj)*AtmospCO2(i,j,bi,bj)
153  c find exchange coefficient  c find exchange coefficient
154  c  account for schmidt number and and varible piston velocity  c  account for schmidt number and and varible piston velocity
155                  pisvel(i,j,bi,bj)=0.337 _d 0 *wind(i,j,bi,bj)**2/3.6 _d 5
156                Kwexch(i,j) =                Kwexch(i,j) =
157       &             pisvel(i,j,bi,bj)       &             pisvel(i,j,bi,bj)
158       &             / sqrt(SchmidtNoDIC(i,j)/660.0)       &             / sqrt(SchmidtNoDIC(i,j)/660.0 _d 0)
159  c OR use a constant  coeff  c OR use a constant  coeff
160  c             Kwexch(i,j) = 5e-5  c             Kwexch(i,j) = 5e-5
161  c ice influence  c ice influence
162                Kwexch(i,j)  =(1.d0-Fice(i,j,bi,bj))*Kwexch(i,j)                Kwexch(i,j)  =(1. _d 0 - FIce(i,j,bi,bj))*Kwexch(i,j)
163    
164    
165  C Calculate flux in terms of DIC units using K0, solubility  C Calculate flux in terms of DIC units using K0, solubility
# Line 159  C Converting pCO2 to [CO2] using ff, as Line 172  C Converting pCO2 to [CO2] using ff, as
172       &         ff(i,j,bi,bj)*pCO2(i,j,bi,bj)       &         ff(i,j,bi,bj)*pCO2(i,j,bi,bj)
173       &         )       &         )
174              ELSE              ELSE
175                 FluxCO2(i,j,bi,bj) = 0.                 FluxCO2(i,j,bi,bj) = 0. _d 0
176              ENDIF              ENDIF
177  C convert flux (mol kg-1 m s-1) to (mol m-2 s-1)  C convert flux (mol kg-1 m s-1) to (mol m-2 s-1)
178              FluxCO2(i,j,bi,bj) = FluxCO2(i,j,bi,bj)/permil              FluxCO2(i,j,bi,bj) = FluxCO2(i,j,bi,bj)/permil
# Line 184  c Line 197  c
197           ENDDO           ENDDO
198    
199  C update tendency        C update tendency      
200           DO j=1-OLy,sNy+OLy           DO j=jmin,jmax
201            DO i=1-OLx,sNx+OLx            DO i=imin,imax
202             GDC(i,j)= maskC(i,j,kLev,bi,bj)*recip_drF(kLev)*             GDC(i,j)= maskC(i,j,kLev,bi,bj)*recip_drF(kLev)*
203       &                     recip_hFacC(i,j,kLev,bi,bj)*(       &                     recip_hFacC(i,j,kLev,bi,bj)*(
204       &                    FluxCO2(i,j,bi,bj) + VirtualFlux(i,j)       &                    FluxCO2(i,j,bi,bj) + VirtualFlux(i,j)
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