/[MITgcm]/MITgcm/pkg/dic/dic_surfforcing.F
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revision 1.12 by stephd, Tue Nov 28 21:16:03 2006 UTC revision 1.15 by dfer, Tue Aug 14 19:32:40 2007 UTC
# Line 63  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 =================================================================
# Line 83  cQQQQ check ptracer numbers Line 87  cQQQQ check ptracer numbers
87               surfphos(i,j)  = PTR_PO4(i,j,klev)               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 132  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*wind(i,j,bi,bj)**2/3.6d5                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 158  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
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