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! Author: P. Le Van, from formulas by R. Sadourny |
! Author: P. Le Van, from formulas by R. Sadourny |
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! Calcule les longitudes et dérivées dans la grille du GCM pour |
! Calcule les longitudes et dérivées dans la grille du GCM pour |
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! une fonction f(x) à dérivée tangente hyperbolique. |
! une fonction x_f(\tilde x) à dérivée tangente hyperbolique. |
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! Il vaut mieux avoir : grossismx \times delta < pi |
! Il vaut mieux avoir : grossismx \times delta < pi |
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! Le premier point scalaire pour une grille regulière (grossismx = |
! Le premier point scalaire pour une grille regulière (grossismx = |
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! 1., taux = 0., clon = 0.) est à - 180 degrés. |
! 1) avec clon = 0 est à - 180 degrés. |
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USE dimens_m, ONLY: iim |
USE dimens_m, ONLY: iim |
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use dynetat0_m, only: clon, grossismx, dzoomx, taux |
use dynetat0_m, only: clon, grossismx, dzoomx, taux |
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use principal_cshift_m, only: principal_cshift |
use principal_cshift_m, only: principal_cshift |
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use tanh_cautious_m, only: tanh_cautious |
use tanh_cautious_m, only: tanh_cautious |
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REAL, intent(out):: xprimm025(:), rlonv(:), xprimv(:) ! (iim + 1) |
REAL, intent(out):: xprimm025(:) ! (iim + 1) |
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real, intent(out):: rlonu(:), xprimu(:), xprimp025(:) ! (iim + 1) |
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REAL, intent(out):: rlonv(:) ! (iim + 1) |
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! longitudes of points of the "scalar" and "v" grid, in rad |
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REAL, intent(out):: xprimv(:) ! (iim + 1) |
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! 2 pi / iim * (derivative of the longitudinal zoom function)(rlonv) |
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real, intent(out):: rlonu(:) ! (iim + 1) |
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! longitudes of points of the "u" grid, in rad |
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real, intent(out):: xprimu(:) ! (iim + 1) |
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! 2 pi / iim * (derivative of the longitudinal zoom function)(rlonu) |
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real, intent(out):: xprimp025(:) ! (iim + 1) |
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! Local: |
! Local: |
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real rlonm025(iim + 1), rlonp025(iim + 1), d_rlonv(iim) |
real rlonm025(iim + 1), rlonp025(iim + 1), d_rlonv(iim) |
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REAL delta, step |
REAL delta, h |
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DOUBLE PRECISION, dimension(0:nmax):: xtild, fhyp, G, Xf, ffdx |
DOUBLE PRECISION, dimension(0:nmax):: xtild, fhyp, G, Xf, ffdx |
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DOUBLE PRECISION beta |
DOUBLE PRECISION beta |
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INTEGER i, is2 |
INTEGER i, is2 |
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print *, "Call sequence information: fxhyp" |
print *, "Call sequence information: fxhyp" |
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if (grossismx == 1.) then |
if (grossismx == 1.) then |
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step = twopi / iim |
h = twopi / iim |
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xprimm025(:iim) = step |
xprimm025(:iim) = h |
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xprimp025(:iim) = step |
xprimp025(:iim) = h |
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xprimv(:iim) = step |
xprimv(:iim) = h |
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xprimu(:iim) = step |
xprimu(:iim) = h |
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rlonv(:iim) = arth(- pi + clon, step, iim) |
rlonv(:iim) = arth(- pi + clon, h, iim) |
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rlonm025(:iim) = rlonv(:iim) - 0.25 * step |
rlonm025(:iim) = rlonv(:iim) - 0.25 * h |
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rlonp025(:iim) = rlonv(:iim) + 0.25 * step |
rlonp025(:iim) = rlonv(:iim) + 0.25 * h |
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rlonu(:iim) = rlonv(:iim) + 0.5 * step |
rlonu(:iim) = rlonv(:iim) + 0.5 * h |
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else |
else |
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delta = dzoomx * twopi_d |
delta = dzoomx * twopi_d |
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xtild = arth(0d0, pi_d / nmax, nmax + 1) |
xtild = arth(0d0, pi_d / nmax, nmax + 1) |
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* ffdx(:nmax - 1) |
* ffdx(:nmax - 1) |
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Xf(nmax) = pi_d |
Xf(nmax) = pi_d |
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call invert_zoom_x(xf, xtild, G, rlonm025(:iim), xprimm025(:iim), & |
call invert_zoom_x(beta, xf, xtild, G, rlonm025(:iim), xprimm025(:iim), & |
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xuv = - 0.25d0) |
xuv = - 0.25d0) |
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call invert_zoom_x(xf, xtild, G, rlonv(:iim), xprimv(:iim), xuv = 0d0) |
call invert_zoom_x(beta, xf, xtild, G, rlonv(:iim), xprimv(:iim), & |
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call invert_zoom_x(xf, xtild, G, rlonu(:iim), xprimu(:iim), xuv = 0.5d0) |
xuv = 0d0) |
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call invert_zoom_x(xf, xtild, G, rlonp025(:iim), xprimp025(:iim), & |
call invert_zoom_x(beta, xf, xtild, G, rlonu(:iim), xprimu(:iim), & |
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xuv = 0.5d0) |
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call invert_zoom_x(beta, xf, xtild, G, rlonp025(:iim), xprimp025(:iim), & |
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xuv = 0.25d0) |
xuv = 0.25d0) |
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end if |
end if |
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