/[lmdze]/trunk/filtrez/inifgn.f
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Annotation of /trunk/filtrez/inifgn.f

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Revision 154 - (hide annotations)
Tue Jul 7 17:49:23 2015 UTC (8 years, 10 months ago) by guez
Original Path: trunk/Sources/filtrez/inifgn.f
File size: 1935 byte(s) 
Removed argument dtphys of physiq. Use it directly from comconst in
physiq instead.

Donwgraded variables eignfnu, eignfnv of module inifgn_m to dummy
arguments of SUBROUTINE inifgn. They were not used elsewhere than in
the calling procedure inifilr. Renamed argument dv of inifgn to eignval_v.

Made alboc and alboc_cd independent of the size of arguments. Now we
can call them only at indices knindex in interfsurf_hq, where we need
them. Fixed a bug in alboc_cd: rmu0 was modified, and the
corresponding actual argument in interfsurf_hq is an intent(in)
argument of interfsurf_hq.

Variables of size knon instead of klon in interfsur_lim and interfsurf_hq.

Removed argument alb_new of interfsurf_hq because it was the same than
alblw. Simplified test on cycle_diurne, following LMDZ.

Moved tests on nbapp_rad from physiq to read_clesphys2. No need for
separate counter itaprad, we can use itap. Define lmt_pas and radpas
from integer input parameters instead of real-type computed values.
1 guez 113 module inifgn_m
2 guez 3
3 guez 140 use dimens_m, only: iim
4    
5 guez 113 IMPLICIT NONE
6 guez 3
7 guez 140 private iim
8    
9 guez 154 real sddu(iim), sddv(iim)
10     ! sdd[uv] = sqrt(2 pi / iim * (derivative of the longitudinal zoom
11     ! function)(rlon[uv]))
12    
13 guez 140 real unsddu(iim), unsddv(iim)
14    
15 guez 113 contains
16 guez 3
17 guez 154 SUBROUTINE inifgn(eignval_v, eignfnu, eignfnv)
18 guez 3
19 guez 113 ! From LMDZ4/libf/filtrez/inifgn.F, v 1.1.1.1 2004/05/19 12:53:09
20 guez 3
21 guez 154 ! Authors: H. Upadyaya, O. Sharma
22 guez 3
23 guez 154 ! Computes the eigenvalues and eigenvectors of the discrete analog
24     ! of the second derivative with respect to longitude.
25    
26 guez 143 use acc_m, only: acc
27 guez 113 USE dimens_m, ONLY: iim
28 guez 139 USE dynetat0_m, ONLY: xprimu, xprimv
29 guez 143 use numer_rec_95, only: jacobi, eigsrt
30 guez 3
31 guez 154 real, intent(out):: eignval_v(:) ! (iim)
32     ! eigenvalues sorted in descending order
33 guez 81
34 guez 154 real, intent(out):: eignfnu(:, :), eignfnv(:, :) ! (iim, iim) eigenvectors
35    
36 guez 113 ! Local:
37 guez 154
38     REAL a(iim, iim) ! second derivative, symmetric, elements are angle^{-2}
39    
40     REAL deriv_u(iim, iim), deriv_v(iim, iim)
41     ! first derivative at u and v longitudes, elements are angle^{-1}
42    
43     REAL eignval_u(iim)
44 guez 152 INTEGER i
45 guez 81
46 guez 113 !----------------------------------------------------------------
47 guez 81
48 guez 151 print *, "Call sequence information: inifgn"
49    
50 guez 140 sddv = sqrt(xprimv(:iim))
51     sddu = sqrt(xprimu(:iim))
52     unsddu = 1. / sddu
53     unsddv = 1. / sddv
54 guez 81
55 guez 154 deriv_u = 0.
56     deriv_u(iim, 1) = unsddu(iim) * unsddv(1)
57     forall (i = 1:iim) deriv_u(i, i) = - unsddu(i) * unsddv(i)
58     forall (i = 1:iim - 1) deriv_u(i, i + 1) = unsddu(i) * unsddv(i + 1)
59 guez 81
60 guez 154 deriv_v = - transpose(deriv_u)
61 guez 140
62 guez 154 a = matmul(deriv_v, deriv_u) ! second derivative at v longitudes
63     CALL jacobi(a, eignval_v, eignfnv)
64 guez 143 CALL acc(eignfnv)
65 guez 154 CALL eigsrt(eignval_v, eignfnv)
66 guez 81
67 guez 154 a = matmul(deriv_u, deriv_v) ! second derivative at u longitudes
68     CALL jacobi(a, eignval_u, eignfnu)
69 guez 143 CALL acc(eignfnu)
70 guez 154 CALL eigsrt(eignval_u, eignfnu)
71 guez 81
72 guez 113 END SUBROUTINE inifgn
73 guez 81
74 guez 113 end module inifgn_m
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