/[MITgcm]/MITgcm/pkg/dic/bio_export.F
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Contents of /MITgcm/pkg/dic/bio_export.F

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Revision 1.15 - (show annotations) (download)
Tue Oct 9 00:01:42 2007 UTC (16 years, 7 months ago) by jmc
Branch: MAIN
Changes since 1.14: +8 -5 lines
add missing cvs $Header:$ or $Name:$

1 C $Header: $
2 C $Name: $
3
4 #include "DIC_OPTIONS.h"
5 #include "GCHEM_OPTIONS.h"
6
7 CBOP
8 C !ROUTINE: BIO_EXPORT
9
10 C !INTERFACE: ==========================================================
11 SUBROUTINE BIO_EXPORT( PTR_PO4 ,
12 #ifdef ALLOW_FE
13 I PTR_FE,
14 #endif
15 I bioac,
16 I bi,bj,imin,imax,jmin,jmax,
17 I myIter,myTime,myThid)
18
19 c !DESCRIPTION:
20 C Calculate biological activity and export
21
22 C !USES: ===============================================================
23 IMPLICIT NONE
24 #include "SIZE.h"
25 #include "DYNVARS.h"
26 #include "EEPARAMS.h"
27 #include "PARAMS.h"
28 #include "GRID.h"
29 #include "DIC_ABIOTIC.h"
30 #include "DIC_BIOTIC.h"
31 #ifdef USE_QSW
32 #include "FFIELDS.h"
33 #endif
34
35 C !INPUT PARAMETERS: ===================================================
36 C myThid :: thread number
37 C myIter :: current timestep
38 C myTime :: current time
39 C PTR_PO4 :: phosphate tracer field
40 C PTR_FE :: iron tracer field
41 INTEGER myIter
42 _RL myTime
43 INTEGER myThid
44 _RL PTR_PO4(1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr)
45 #ifdef ALLOW_FE
46 _RL PTR_FE(1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr)
47 #endif
48 INTEGER imin, imax, jmin, jmax, bi, bj
49
50
51 C !OUTPUT PARAMETERS: ==================================================
52 C bioac :: biological productivity (will be split
53 C between export and dissolved pool)
54 _RL bioac(1-OLx:sNx+OLx,1-OLy:sNy+OLy,nR)
55
56 #ifdef ALLOW_PTRACERS
57 #ifdef DIC_BIOTIC
58
59 C !LOCAL VARIABLES: ====================================================
60 C i,j,k :: loop indices
61 INTEGER I,J,k
62 _RL sfac(1-OLy:sNy+OLy)
63 _RL lit, atten
64 _RL nutlimit
65 #ifdef AD_SAFE
66 _RL thx, thy, theps
67 #endif
68 CEOP
69
70
71 #ifndef READ_PAR
72 #ifndef USE_QSW
73 call insol(myTime,sfac,bj)
74 #endif
75 #endif
76 DO j=jmin,jmax
77 DO i=imin,imax
78 C Fortran-90
79 CRG C$TAF INIT bio_export = static, nlev
80 C FORTRAN-77 dynamic memory uses adstore adresto
81 CRG C$TAF INIT bio_export = memory
82 C FORTRAN-77 with know max of nlev
83 C$TAF INIT bio_export = static, 10
84 #ifdef READ_PAR
85 lit=PAR(i,j,bi,bj)
86 #else
87 #ifdef USE_QSW
88 lit=-parfrac*Qsw(i,j,bi,bj)*maskC(i,j,1,bi,bj)
89 #else
90 lit=sfac(j)
91 #endif
92 #endif
93 lit=lit*(1. _d 0 - FIce(i,j,bi,bj))
94 DO k=1,nlev
95 C$TAF STORE lit = bio_export
96 atten=(k0*drF(k)*hFacC(i,j,k,bi,bj)*.5)
97 if (k.gt.1) atten=atten+(k0*drF(k-1)
98 & *hFacC(i,j,k-1,bi,bj)*.5)
99 lit=lit*exp(-atten)
100 if (lit.lt.0.d0.or.lit.gt.150) then
101 print*,'QQ lit', lit
102 endif
103
104 #ifdef ALLOW_FE
105 #ifdef AD_SAFE
106 thx = PTR_PO4(i,j,k)/(PTR_PO4(i,j,k)+KPO4)
107 thy = PTR_FE(i,j,k)/(PTR_FE(i,j,k)+KFE)
108 theps = 1.d-6
109 nutlimit= ( 1.d0 - tanh((thx-thy)/theps) ) * thx/2 +
110 & ( 1.d0 + tanh((thx-thy)/theps) ) * thy/2
111 #else
112 nutlimit= min(PTR_PO4(i,j,k)/(PTR_PO4(i,j,k)+KPO4),
113 & PTR_FE(i,j,k)/(PTR_FE(i,j,k)+KFE) )
114 #endif
115 #else
116 nutlimit= PTR_PO4(i,j,k)/(PTR_PO4(i,j,k)+KPO4)
117 #endif
118
119 bioac(i,j,k)=alpha(i,j,bi,bj)*
120 & lit/(lit+lit0)*maskC(i,j,k,bi,bj)*
121 & nutlimit
122 ENDDO
123 ENDDO
124 ENDDO
125 c
126 #endif
127 #endif
128 RETURN
129 END

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