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Contents of /trunk/phylmd/cltrac.f

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Revision 81 - (show annotations)
Wed Mar 5 14:38:41 2014 UTC (10 years, 2 months ago) by guez
Original Path: trunk/phylmd/cltrac.f90
File size: 4262 byte(s) 
 Converted to free source form files which were still in fixed source
form. The conversion was done using the polish mode of the NAG Fortran
Compiler.

In addition to converting to free source form, the processing of the
files also:

-- indented the code (including comments);

-- set Fortran keywords to uppercase, and set all other identifiers
to lower case;

-- added qualifiers to end statements (for example "end subroutine
conflx", instead of "end");

-- changed the terminating statements of all DO loops so that each
loop ends with an ENDDO statement (instead of a labeled continue).
1
2 ! $Header: /home/cvsroot/LMDZ4/libf/phylmd/cltrac.F,v 1.1.1.1 2004/05/19
3 ! 12:53:07 lmdzadmin Exp $
4
5 SUBROUTINE cltrac(dtime, coef, t, tr, flux, paprs, pplay, delp, d_tr)
6 USE dimens_m
7 USE dimphy
8 USE suphec_m
9 IMPLICIT NONE
10 ! ======================================================================
11 ! Auteur(s): O. Boucher (LOA/LMD) date: 19961127
12 ! inspire de clvent
13 ! Objet: diffusion verticale de traceurs avec flux fixe a la surface
14 ! ou/et flux du type c-drag
15 ! ======================================================================
16 ! Arguments:
17 ! dtime----input-R- intervalle du temps (en second)
18 ! coef-----input-R- le coefficient d'echange (m**2/s) l>1
19 ! tr-------input-R- la q. de traceurs
20 ! flux-----input-R- le flux de traceurs a la surface
21 ! paprs----input-R- pression a inter-couche (Pa)
22 ! pplay----input-R- pression au milieu de couche (Pa)
23 ! delp-----input-R- epaisseur de couche (Pa)
24 ! cdrag----input-R- cdrag pour le flux de surface (non active)
25 ! tr0------input-R- traceurs a la surface ou dans l'ocean (non active)
26 ! d_tr-----output-R- le changement de tr
27 ! flux_tr--output-R- flux de tr
28 ! ======================================================================
29 REAL, INTENT (IN) :: dtime
30 REAL coef(klon, klev)
31 REAL, INTENT (IN) :: t(klon, klev) ! temperature (K)
32 REAL tr(klon, klev)
33 REAL, INTENT (IN) :: paprs(klon, klev+1)
34 REAL, INTENT (IN) :: pplay(klon, klev)
35 REAL delp(klon, klev)
36 REAL d_tr(klon, klev)
37 REAL flux(klon), cdrag(klon), tr0(klon)
38 ! REAL flux_tr(klon,klev)
39 ! ======================================================================
40 ! ======================================================================
41 INTEGER i, k
42 REAL zx_ctr(klon, 2:klev)
43 REAL zx_dtr(klon, 2:klev)
44 REAL zx_buf(klon)
45 REAL zx_coef(klon, klev)
46 REAL local_tr(klon, klev)
47 REAL zx_alf1(klon), zx_alf2(klon), zx_flux(klon)
48 ! ======================================================================
49 DO k = 1, klev
50 DO i = 1, klon
51 local_tr(i, k) = tr(i, k)
52 END DO
53 END DO
54
55
56 ! ======================================================================
57 DO i = 1, klon
58 zx_alf1(i) = (paprs(i,1)-pplay(i,2))/(pplay(i,1)-pplay(i,2))
59 zx_alf2(i) = 1.0 - zx_alf1(i)
60 zx_flux(i) = -flux(i)*dtime*rg
61 ! --pour le moment le flux est prescrit
62 ! --cdrag et zx_coef(1) vaut 0
63 cdrag(i) = 0.0
64 tr0(i) = 0.0
65 zx_coef(i, 1) = cdrag(i)*dtime*rg
66 END DO
67 ! ======================================================================
68 DO k = 2, klev
69 DO i = 1, klon
70 zx_coef(i, k) = coef(i, k)*rg/(pplay(i,k-1)-pplay(i,k))* &
71 (paprs(i,k)*2/(t(i,k)+t(i,k-1))/rd)**2
72 zx_coef(i, k) = zx_coef(i, k)*dtime*rg
73 END DO
74 END DO
75 ! ======================================================================
76 DO i = 1, klon
77 zx_buf(i) = delp(i, 1) + zx_coef(i, 1)*zx_alf1(i) + zx_coef(i, 2)
78 zx_ctr(i, 2) = (local_tr(i,1)*delp(i,1)+zx_coef(i,1)*tr0(i)-zx_flux(i))/ &
79 zx_buf(i)
80 zx_dtr(i, 2) = (zx_coef(i,2)-zx_alf2(i)*zx_coef(i,1))/zx_buf(i)
81 END DO
82
83 DO k = 3, klev
84 DO i = 1, klon
85 zx_buf(i) = delp(i, k-1) + zx_coef(i, k) + zx_coef(i, k-1)*(1.-zx_dtr(i &
86 ,k-1))
87 zx_ctr(i, k) = (local_tr(i,k-1)*delp(i,k-1)+zx_coef(i,k-1)*zx_ctr(i,k-1 &
88 ))/zx_buf(i)
89 zx_dtr(i, k) = zx_coef(i, k)/zx_buf(i)
90 END DO
91 END DO
92 DO i = 1, klon
93 local_tr(i, klev) = (local_tr(i,klev)*delp(i,klev)+zx_coef(i,klev)*zx_ctr &
94 (i,klev))/(delp(i,klev)+zx_coef(i,klev)-zx_coef(i,klev)*zx_dtr(i,klev))
95 END DO
96 DO k = klev - 1, 1, -1
97 DO i = 1, klon
98 local_tr(i, k) = zx_ctr(i, k+1) + zx_dtr(i, k+1)*local_tr(i, k+1)
99 END DO
100 END DO
101 ! ======================================================================
102 ! == flux_tr est le flux de traceur (positif vers bas)
103 ! DO i = 1, klon
104 ! flux_tr(i,1) = zx_coef(i,1)/(RG*dtime)
105 ! ENDDO
106 ! DO k = 2, klev
107 ! DO i = 1, klon
108 ! flux_tr(i,k) = zx_coef(i,k)/(RG*dtime)
109 ! . * (local_tr(i,k)-local_tr(i,k-1))
110 ! ENDDO
111 ! ENDDO
112 ! ======================================================================
113 DO k = 1, klev
114 DO i = 1, klon
115 d_tr(i, k) = local_tr(i, k) - tr(i, k)
116 END DO
117 END DO
118
119 RETURN
120 END SUBROUTINE cltrac
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