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

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Revision 1.26 - (hide annotations) (download)
Sun Apr 11 22:03:53 2010 UTC (14 years, 2 months ago) by jmc
Branch: MAIN
CVS Tags: checkpoint62g, checkpoint62f, checkpoint62e, checkpoint62i, checkpoint62h
Changes since 1.25: +5 -2 lines
avoid unused variables.

1 jmc 1.26 C $Header: /u/gcmpack/MITgcm/pkg/dic/bio_export.F,v 1.25 2009/10/17 20:47:34 heimbach Exp $
2 jmc 1.15 C $Name: $
3    
4 edhill 1.3 #include "DIC_OPTIONS.h"
5 stephd 1.1
6 stephd 1.5 CBOP
7     C !ROUTINE: BIO_EXPORT
8    
9     C !INTERFACE: ==========================================================
10 jmc 1.15 SUBROUTINE BIO_EXPORT( PTR_PO4 ,
11 stephd 1.1 #ifdef ALLOW_FE
12 jmc 1.15 I PTR_FE,
13     #endif
14 stephd 1.1 I bioac,
15     I bi,bj,imin,imax,jmin,jmax,
16     I myIter,myTime,myThid)
17    
18 stephd 1.5 c !DESCRIPTION:
19 jmc 1.15 C Calculate biological activity and export
20 stephd 1.5
21     C !USES: ===============================================================
22 stephd 1.1 IMPLICIT NONE
23     #include "SIZE.h"
24     #include "DYNVARS.h"
25     #include "EEPARAMS.h"
26     #include "PARAMS.h"
27     #include "GRID.h"
28 dfer 1.22 #include "DIC_VARS.h"
29 stephd 1.12 #ifdef USE_QSW
30 stephd 1.11 #include "FFIELDS.h"
31     #endif
32 stephd 1.1
33 stephd 1.5 C !INPUT PARAMETERS: ===================================================
34     C myThid :: thread number
35     C myIter :: current timestep
36     C myTime :: current time
37     C PTR_PO4 :: phosphate tracer field
38     C PTR_FE :: iron tracer field
39 stephd 1.1 INTEGER myIter
40     _RL myTime
41     INTEGER myThid
42     _RL PTR_PO4(1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr)
43     #ifdef ALLOW_FE
44     _RL PTR_FE(1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr)
45     #endif
46 stephd 1.5 INTEGER imin, imax, jmin, jmax, bi, bj
47    
48    
49     C !OUTPUT PARAMETERS: ==================================================
50     C bioac :: biological productivity (will be split
51     C between export and dissolved pool)
52 stephd 1.1 _RL bioac(1-OLx:sNx+OLx,1-OLy:sNy+OLy,nR)
53    
54     #ifdef ALLOW_PTRACERS
55     #ifdef DIC_BIOTIC
56 stephd 1.5
57     C !LOCAL VARIABLES: ====================================================
58     C i,j,k :: loop indices
59 stephd 1.1 INTEGER I,J,k
60 stephd 1.5 _RL sfac(1-OLy:sNy+OLy)
61     _RL lit, atten
62 stephd 1.10 _RL nutlimit
63 jmc 1.26 _RL tmppo4
64     #ifdef ALLOW_FE
65     _RL tmpfe
66     #endif
67 stephd 1.10 #ifdef AD_SAFE
68     _RL thx, thy, theps
69     #endif
70 stephd 1.5 CEOP
71 stephd 1.10
72    
73 stephd 1.8 #ifndef READ_PAR
74 stephd 1.12 #ifndef USE_QSW
75 jmc 1.24 CALL INSOL(myTime,sfac,bi,bj,myThid)
76 stephd 1.8 #endif
77 stephd 1.11 #endif
78 stephd 1.9 DO j=jmin,jmax
79     DO i=imin,imax
80 heimbach 1.25 cph: following init assumes nlev=nr
81     cph: set in dic_init_fixed.F (ALLOW_AUTODIFF)
82     C$TAF INIT bio_export = static, nr
83 stephd 1.2 C FORTRAN-77 dynamic memory uses adstore adresto
84     CRG C$TAF INIT bio_export = memory
85 stephd 1.8 #ifdef READ_PAR
86     lit=PAR(i,j,bi,bj)
87 dfer 1.20 #elif (defined USE_QSW)
88 stephd 1.13 lit=-parfrac*Qsw(i,j,bi,bj)*maskC(i,j,1,bi,bj)
89 stephd 1.11 #else
90 stephd 1.1 lit=sfac(j)
91 stephd 1.8 #endif
92 stephd 1.18
93 dfer 1.20 IF ( .NOT. QSW_underice ) THEN
94     c if using Qsw but not seaice/thsice or coupled, then
95     c ice fraction needs to be taken into account
96 stephd 1.19 lit=lit*(1. _d 0 - FIce(i,j,bi,bj))
97 dfer 1.20 ENDIF
98 stephd 1.19 c
99 stephd 1.1 DO k=1,nlev
100 stephd 1.2 C$TAF STORE lit = bio_export
101 dfer 1.17 atten=(k0*drF(k)*hFacC(i,j,k,bi,bj)*.5 _d 0)
102 stephd 1.7 if (k.gt.1) atten=atten+(k0*drF(k-1)
103 dfer 1.17 & *hFacC(i,j,k-1,bi,bj)*.5 _d 0)
104 dfer 1.14 lit=lit*exp(-atten)
105 dfer 1.17 IF (lit.LT.0. _d 0.OR.lit.GT.350. _d 0) THEN
106 stephd 1.1 print*,'QQ lit', lit
107 dfer 1.17 ENDIF
108 stephd 1.10
109 stephd 1.21 #ifdef DIC_NO_NEG
110     tmppo4=max(0. _d 0, PTR_PO4(i,j,k))
111     lit=max(0. _d 0,lit)
112     #else
113     tmppo4=PTR_PO4(i,j,k)
114     #endif
115    
116 stephd 1.1 #ifdef ALLOW_FE
117 stephd 1.21 #ifdef DIC_NO_NEG
118     tmpfe=max(0. _d 0,PTR_FE(i,j,k))
119     #else
120     tmpfe=PTR_FE(i,j,k)
121     #endif
122 stephd 1.10 #ifdef AD_SAFE
123 stephd 1.21 thx = tmppo4/(tmppo4+KPO4)
124     thy = tmpfe/(tmpfe+KFE)
125     c thx = PTR_PO4(i,j,k)/(PTR_PO4(i,j,k)+KPO4)
126     c thy = PTR_FE(i,j,k)/(PTR_FE(i,j,k)+KFE)
127 dfer 1.17 theps = 1. _d -6
128     nutlimit= ( 1. _d 0 - tanh((thx-thy)/theps) ) * thx/2. _d 0
129     & +( 1. _d 0 + tanh((thx-thy)/theps) ) * thy/2. _d 0
130 stephd 1.5 #else
131 stephd 1.21 nutlimit= min(tmppo4/(tmppo4+KPO4),
132     & tmpfe/(tmpfe+KFE) )
133 stephd 1.1 #endif
134 stephd 1.10 #else
135 stephd 1.21 nutlimit= tmppo4/(tmppo4+KPO4)
136 stephd 1.10 #endif
137    
138     bioac(i,j,k)=alpha(i,j,bi,bj)*
139     & lit/(lit+lit0)*maskC(i,j,k,bi,bj)*
140     & nutlimit
141 stephd 1.1 ENDDO
142     ENDDO
143     ENDDO
144     c
145     #endif
146     #endif
147     RETURN
148     END

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