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

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Revision 1.22 - (hide annotations) (download)
Fri Apr 4 21:32:36 2008 UTC (16 years, 2 months ago) by dfer
Branch: MAIN
Changes since 1.21: +2 -3 lines
Merging DIC_ABIOTIC.h and DIC_BIOTIC.h

1 dfer 1.22 C $Header: /u/gcmpack/MITgcm/pkg/dic/bio_export.F,v 1.21 2007/12/06 22:24:34 stephd Exp $
2 jmc 1.15 C $Name: $
3    
4 edhill 1.3 #include "DIC_OPTIONS.h"
5 stephd 1.1 #include "GCHEM_OPTIONS.h"
6    
7 stephd 1.5 CBOP
8     C !ROUTINE: BIO_EXPORT
9    
10     C !INTERFACE: ==========================================================
11 jmc 1.15 SUBROUTINE BIO_EXPORT( PTR_PO4 ,
12 stephd 1.1 #ifdef ALLOW_FE
13 jmc 1.15 I PTR_FE,
14     #endif
15 stephd 1.1 I bioac,
16     I bi,bj,imin,imax,jmin,jmax,
17     I myIter,myTime,myThid)
18    
19 stephd 1.5 c !DESCRIPTION:
20 jmc 1.15 C Calculate biological activity and export
21 stephd 1.5
22     C !USES: ===============================================================
23 stephd 1.1 IMPLICIT NONE
24     #include "SIZE.h"
25     #include "DYNVARS.h"
26     #include "EEPARAMS.h"
27     #include "PARAMS.h"
28     #include "GRID.h"
29 dfer 1.22 #include "DIC_VARS.h"
30 stephd 1.12 #ifdef USE_QSW
31 stephd 1.11 #include "FFIELDS.h"
32     #endif
33 stephd 1.1
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_PO4 :: phosphate tracer field
39     C PTR_FE :: iron tracer field
40 stephd 1.1 INTEGER myIter
41     _RL myTime
42     INTEGER myThid
43     _RL PTR_PO4(1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr)
44     #ifdef ALLOW_FE
45     _RL PTR_FE(1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr)
46     #endif
47 stephd 1.5 INTEGER imin, imax, jmin, jmax, bi, bj
48    
49    
50     C !OUTPUT PARAMETERS: ==================================================
51     C bioac :: biological productivity (will be split
52     C between export and dissolved pool)
53 stephd 1.1 _RL bioac(1-OLx:sNx+OLx,1-OLy:sNy+OLy,nR)
54    
55     #ifdef ALLOW_PTRACERS
56     #ifdef DIC_BIOTIC
57 stephd 1.5
58     C !LOCAL VARIABLES: ====================================================
59     C i,j,k :: loop indices
60 stephd 1.1 INTEGER I,J,k
61 stephd 1.5 _RL sfac(1-OLy:sNy+OLy)
62     _RL lit, atten
63 stephd 1.10 _RL nutlimit
64 stephd 1.21 _RL tmpfe, tmppo4
65 stephd 1.10 #ifdef AD_SAFE
66     _RL thx, thy, theps
67     #endif
68 stephd 1.5 CEOP
69 stephd 1.10
70    
71 stephd 1.8 #ifndef READ_PAR
72 stephd 1.12 #ifndef USE_QSW
73 stephd 1.1 call insol(myTime,sfac,bj)
74 stephd 1.8 #endif
75 stephd 1.11 #endif
76 stephd 1.9 DO j=jmin,jmax
77     DO i=imin,imax
78 stephd 1.2 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$TAF INIT bio_export = static, 10
84 stephd 1.8 #ifdef READ_PAR
85     lit=PAR(i,j,bi,bj)
86 dfer 1.20 #elif (defined USE_QSW)
87 stephd 1.13 lit=-parfrac*Qsw(i,j,bi,bj)*maskC(i,j,1,bi,bj)
88 stephd 1.11 #else
89 stephd 1.1 lit=sfac(j)
90 stephd 1.8 #endif
91 stephd 1.18
92 dfer 1.20 IF ( .NOT. QSW_underice ) THEN
93     c if using Qsw but not seaice/thsice or coupled, then
94     c ice fraction needs to be taken into account
95 stephd 1.19 lit=lit*(1. _d 0 - FIce(i,j,bi,bj))
96 dfer 1.20 ENDIF
97 stephd 1.19 c
98 stephd 1.1 DO k=1,nlev
99 stephd 1.2 C$TAF STORE lit = bio_export
100 dfer 1.17 atten=(k0*drF(k)*hFacC(i,j,k,bi,bj)*.5 _d 0)
101 stephd 1.7 if (k.gt.1) atten=atten+(k0*drF(k-1)
102 dfer 1.17 & *hFacC(i,j,k-1,bi,bj)*.5 _d 0)
103 dfer 1.14 lit=lit*exp(-atten)
104 dfer 1.17 IF (lit.LT.0. _d 0.OR.lit.GT.350. _d 0) THEN
105 stephd 1.1 print*,'QQ lit', lit
106 dfer 1.17 ENDIF
107 stephd 1.10
108 stephd 1.21 #ifdef DIC_NO_NEG
109     tmppo4=max(0. _d 0, PTR_PO4(i,j,k))
110     lit=max(0. _d 0,lit)
111     #else
112     tmppo4=PTR_PO4(i,j,k)
113     #endif
114    
115 stephd 1.1 #ifdef ALLOW_FE
116 stephd 1.21 #ifdef DIC_NO_NEG
117     tmpfe=max(0. _d 0,PTR_FE(i,j,k))
118     #else
119     tmpfe=PTR_FE(i,j,k)
120     #endif
121 stephd 1.10 #ifdef AD_SAFE
122 stephd 1.21 thx = tmppo4/(tmppo4+KPO4)
123     thy = tmpfe/(tmpfe+KFE)
124     c thx = PTR_PO4(i,j,k)/(PTR_PO4(i,j,k)+KPO4)
125     c thy = PTR_FE(i,j,k)/(PTR_FE(i,j,k)+KFE)
126 dfer 1.17 theps = 1. _d -6
127     nutlimit= ( 1. _d 0 - tanh((thx-thy)/theps) ) * thx/2. _d 0
128     & +( 1. _d 0 + tanh((thx-thy)/theps) ) * thy/2. _d 0
129 stephd 1.5 #else
130 stephd 1.21 nutlimit= min(tmppo4/(tmppo4+KPO4),
131     & tmpfe/(tmpfe+KFE) )
132 stephd 1.1 #endif
133 stephd 1.10 #else
134 stephd 1.21 nutlimit= tmppo4/(tmppo4+KPO4)
135 stephd 1.10 #endif
136    
137     bioac(i,j,k)=alpha(i,j,bi,bj)*
138     & lit/(lit+lit0)*maskC(i,j,k,bi,bj)*
139     & nutlimit
140 stephd 1.1 ENDDO
141     ENDDO
142     ENDDO
143     c
144     #endif
145     #endif
146     RETURN
147     END

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