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module comvert |
module disvert_m |
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use dimens_m, only: llm |
use dimens_m, only: llm |
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private llm |
private llm |
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real ap(llm+1), pa ! in Pa |
real ap(llm+1), pa ! in Pa |
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real bp(llm+1), dpres(llm) |
real bp(llm+1) |
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real presnivs(llm) ! pressions approximatives des milieux couches, en Pa |
real presnivs(llm) ! pressions approximatives des milieux de couches, en Pa |
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real, parameter:: preff = 101325. ! in Pa |
real, parameter:: preff = 101325. ! in Pa |
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real nivsigs(llm), nivsig(llm+1) |
real nivsigs(llm), nivsig(llm+1) |
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SUBROUTINE disvert |
SUBROUTINE disvert |
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! From dyn3d/disvert.F, v 1.1.1.1 2004/05/19 12:53:05 |
! From dyn3d/disvert.F, v 1.1.1.1 2004/05/19 12:53:05 |
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! Auteur : P. Le Van |
! Author: P. Le Van |
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! This procedure sets the vertical grid. |
! This procedure sets the vertical grid. It defines the host |
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! It defines the host variables "ap", "bp", "dpres", "presnivs", |
! variables "ap", "bp", "presnivs", "nivsigs" and "nivsig". "pa" |
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! "nivsigs" and "nivsig". |
! should be defined before this procedure is called. |
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! "pa" should be defined before this procedure is called. |
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use comconst, only: pi |
use jumble, only: new_unit |
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use nr_util, only: pi, assert |
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use unit_nml_m, only: unit_nml |
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! Local: |
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REAL s(llm+1) |
REAL s(llm+1) |
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! (atmospheric hybrid sigma-pressure coordinate at the interface |
! "s(l)" is the atmospheric hybrid sigma-pressure coordinate at |
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! between layers "l" and "l-1") |
! the interface between layers "l" and "l-1" |
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real ds(llm) |
real ds(llm) |
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! "ds(l)" : épaisseur de la couche "l" dans la coordonnée "s" |
! "ds(l)" : épaisseur de la couche "l" dans la coordonnée "s" |
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INTEGER l |
INTEGER l, unit |
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REAL alpha, x(llm) |
REAL alpha, x(llm) |
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character(len=7):: s_sampling = "LMD5" |
character(len=7):: vert_sampling = "tropo" |
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! (other allowed values are "param", "strato1" and "strato2") |
! other allowed values are "param", "strato" and "read" |
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real:: h = 7. ! scale height, in km |
real:: h = 7. ! scale height, in km |
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! (used only if "s_sampling" == "param" or "strato1") |
! used only if vert_sampling == "param" |
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! These variables are used only in the case 's_sampling == "param"': |
! These variables are used only in the case vert_sampling == "param": |
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real:: deltaz = 0.04 ! épaisseur de la première couche |
real:: deltaz = 0.04 ! épaisseur de la première couche |
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real:: beta = 1.3 ! facteur d'accroissement en haut |
real:: beta = 1.3 ! facteur d'accroissement en haut |
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real:: k0 = 20. ! nombre de couches dans la transition surface |
real:: k0 = 20. ! nombre de couches dans la transition surface |
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real:: k1 = 1.2 ! nombre de couches dans la transition haute |
real:: k1 = 1.2 ! nombre de couches dans la transition haute |
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REAL ZZ(llm + 1), DZ(llm) ! in km |
namelist /disvert_nml/h, deltaz, beta, k0, k1, vert_sampling |
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namelist /disvert_nml/h, deltaz, beta, k0, k1, s_sampling |
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!----------------------------------------------------------------------- |
!----------------------------------------------------------------------- |
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forall (l = 1: llm) nivsigs(l) = REAL(l) |
forall (l = 1: llm) nivsigs(l) = REAL(l) |
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forall (l = 1: llm + 1) nivsig(l) = REAL(l) |
forall (l = 1: llm + 1) nivsig(l) = REAL(l) |
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! Compute "s": |
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s(1) = 1. |
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s(llm+1) = 0. |
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print *, "Enter namelist 'disvert_nml'." |
print *, "Enter namelist 'disvert_nml'." |
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read(unit=*, nml=disvert_nml) |
read(unit=*, nml=disvert_nml) |
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write(unit=*, nml=disvert_nml) |
write(unit_nml, nml=disvert_nml) |
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select case (s_sampling) |
select case (vert_sampling) |
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case ("param") |
case ("param") |
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s(1) = 1. |
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s(llm+1) = 0. |
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alpha = deltaz / tanh(1./k0) * 2. |
alpha = deltaz / tanh(1./k0) * 2. |
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forall (l = 2: llm) s(l) & |
forall (l = 2: llm) s(l) & |
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= cosh((l - 1) / k0) **(- alpha * k0 / h) & |
= cosh((l - 1) / k0) **(- alpha * k0 / h) & |
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* exp(- alpha / h * tanh((llm - k1) / k0) & |
* exp(- alpha / h * tanh((llm - k1) / k0) & |
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* beta **(l - 1 - (llm - k1)) / log(beta)) |
* beta **(l - 1 - (llm - k1)) / log(beta)) |
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case ("LMD5") |
call compute_ab |
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! Ancienne discrétisation |
case ("tropo") |
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s(1) = 1. |
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s(llm+1) = 0. |
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forall (l = 1: llm) ds(l) & |
forall (l = 1: llm) ds(l) & |
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= 1. + 7. * SIN(pi * (REAL(l)-0.5) / real(llm+1))**2 |
= 1. + 7. * SIN(pi * (REAL(l) - 0.5) / real(llm + 1))**2 |
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ds = ds / sum(ds) |
ds = ds / sum(ds) |
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DO l = llm, 2, -1 |
DO l = llm, 2, -1 |
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s(l) = s(l+1) + ds(l) |
s(l) = s(l+1) + ds(l) |
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ENDDO |
ENDDO |
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case ("strato1") |
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! F. Lott 70 niveaux et plus |
call compute_ab |
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forall (l = 1: llm) dz(l) = 1.56 + TANH(REAL(l - 12) / 5.) & |
case ("strato") |
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+ TANH(REAL(l - llm) / 10.) / 2. |
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zz(1) = 0. |
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DO l = 2, llm + 1 |
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zz(l) = zz(l - 1) + dz(l - 1) |
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end DO |
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s(2:llm) = (exp(- zz(2:llm) / h) - exp(- zz(llm + 1) / h)) & |
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/ (1. - exp(- zz(llm + 1) / h)) |
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case ("strato2") |
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! Recommended by F. Lott for a domain including the stratosphere |
! Recommended by F. Lott for a domain including the stratosphere |
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s(1) = 1. |
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s(llm+1) = 0. |
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forall (l = 1: llm) x(l) = pi * (l - 0.5) / (llm + 1) |
forall (l = 1: llm) x(l) = pi * (l - 0.5) / (llm + 1) |
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ds = (1. + 7. * SIN(x)**2) * (1. - tanh(2 * x / pi - 1.))**2 / 4. |
ds = (0.3 + 7. * SIN(x)**2) * (1. - tanh(2 * x / pi - 1.))**2 / 4. |
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ds = ds / sum(ds) |
ds = ds / sum(ds) |
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DO l = llm, 2, -1 |
DO l = llm, 2, -1 |
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s(l) = s(l+1) + ds(l) |
s(l) = s(l+1) + ds(l) |
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ENDDO |
ENDDO |
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call compute_ab |
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case("read") |
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! Read "ap" and "bp". First line is skipped (title line). "ap" |
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! should be in Pa. First couple of values should correspond to |
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! the surface, that is : "bp" should be in descending order. |
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call new_unit(unit) |
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open(unit, file="hybrid.csv", status="old", action="read", & |
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position="rewind") |
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read(unit, fmt=*) ! skip title line |
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do l = 1, llm + 1 |
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read(unit, fmt=*) ap(l), bp(l) |
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end do |
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close(unit) |
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! Quick check: |
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call assert(ap(1) == 0., ap(llm + 1) == 0., bp(1) == 1., & |
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bp(llm + 1) == 0., "disvert: bad ap or bp values") |
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case default |
case default |
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print *, 'Wrong value for "s_sampling"' |
print *, 'Wrong value for "vert_sampling"' |
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stop 1 |
stop 1 |
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END select |
END select |
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! Calcul de "ap" et "bp" : |
forall (l = 1: llm) presnivs(l) = 0.5 & |
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bp(:llm) = EXP(1. - 1. / s(:llm)**2) |
* (ap(l) + bp(l) * preff + ap(l+1) + bp(l+1) * preff) |
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bp(llm + 1) = 0. |
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ap = pa * (s - bp) |
contains |
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forall (l = 1: llm) |
subroutine compute_ab |
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dpres(l) = bp(l) - bp(l+1) |
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presnivs(l) = 0.5 * (ap(l) + bp(l) * preff + ap(l+1) + bp(l+1) * preff) |
! Calcul de "ap" et "bp" : |
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end forall |
bp(:llm) = EXP(1. - 1. / s(:llm)**2) |
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bp(llm + 1) = 0. |
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ap = pa * (s - bp) |
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end subroutine compute_ab |
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END SUBROUTINE disvert |
END SUBROUTINE disvert |
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end module comvert |
end module disvert_m |