/[lmdze]/trunk/Sources/misc/coefpoly.f
ViewVC logotype

Contents of /trunk/Sources/misc/coefpoly.f

Parent Directory Parent Directory | Revision Log Revision Log


Revision 91 - (show annotations)
Wed Mar 26 17:18:58 2014 UTC (10 years, 1 month ago) by guez
Original Path: trunk/dyn3d/coefpoly.f
File size: 1197 byte(s)
Removed unused variables lock_startdate and time_stamp of module
calendar.

Noticed that physiq does not change the surface pressure. So removed
arguments ps and dpfi of subroutine addfi. dpfi was always 0. The
computation of ps in addfi included some averaging at the poles. In
principle, this does not change ps but in practice it does because of
finite numerical precision. So the results of the simulation are
changed. Removed arguments ps and dpfi of calfis. Removed argument
d_ps of physiq.

du at the poles is not computed by dudv1, so declare only the
corresponding latitudes in dudv1. caldyn passes only a section of the
array dudyn as argument.

Removed variable niadv of module iniadvtrac_m.

Declared arguments of exner_hyb as assumed-shape arrays and made all
other horizontal sizes in exner_hyb dynamic. This allows the external
program test_disvert to use exner_hyb at a single horizontal position.

1
2 ! $Header: /home/cvsroot/LMDZ4/libf/dyn3d/coefpoly.F,v 1.1.1.1 2004/05/19
3 ! 12:53:05 lmdzadmin Exp $
4
5 SUBROUTINE coefpoly(xf1, xf2, xprim1, xprim2, xtild1, xtild2, a0, a1, a2, a3)
6 IMPLICIT NONE
7
8 ! ... Auteur : P. Le Van ...
9
10
11 ! Calcul des coefficients a0, a1, a2, a3 du polynome de degre 3 qui
12 ! satisfait aux 4 equations suivantes :
13
14 ! a0 + a1*xtild1 + a2*xtild1*xtild1 + a3*xtild1*xtild1*xtild1 = Xf1
15 ! a0 + a1*xtild2 + a2*xtild2*xtild2 + a3*xtild2*xtild2*xtild2 = Xf2
16 ! a1 + 2.*a2*xtild1 + 3.*a3*xtild1*xtild1 = Xprim1
17 ! a1 + 2.*a2*xtild2 + 3.*a3*xtild2*xtild2 = Xprim2
18
19 ! On en revient a resoudre un systeme de 4 equat.a 4 inconnues a0,a1,a2,a3
20
21 DOUBLE PRECISION xf1, xf2, xprim1, xprim2, xtild1, xtild2
22 DOUBLE PRECISION a1, a2, a3, a0, xtil1car, xtil2car, derr, x1x2car
23
24 xtil1car = xtild1*xtild1
25 xtil2car = xtild2*xtild2
26
27 derr = 2.*(xf2-xf1)/(xtild1-xtild2)
28
29 x1x2car = (xtild1-xtild2)*(xtild1-xtild2)
30
31 a3 = (derr+xprim1+xprim2)/x1x2car
32 a2 = (xprim1-xprim2+3.*a3*(xtil2car-xtil1car))/(2.*(xtild1-xtild2))
33
34 a1 = xprim1 - 3.*a3*xtil1car - 2.*a2*xtild1
35 a0 = xf1 - a3*xtild1*xtil1car - a2*xtil1car - a1*xtild1
36
37 END SUBROUTINE coefpoly

  ViewVC Help
Powered by ViewVC 1.1.21