/[lmdze]/trunk/dyn3d/disvert.f
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trunk/libf/dyn3d/comvert.f90 revision 22 by guez, Fri Jul 31 15:18:47 2009 UTC trunk/libf/dyn3d/disvert.f90 revision 66 by guez, Thu Sep 20 13:00:41 2012 UTC
# Line 1  Line 1 
1  module comvert  module disvert_m
2    
3    use dimens_m, only: llm    use dimens_m, only: llm
4    
# Line 7  module comvert Line 7  module comvert
7    private llm    private llm
8    
9    real ap(llm+1), pa ! in Pa    real ap(llm+1), pa ! in Pa
10    real bp(llm+1), dpres(llm)    real bp(llm+1)
11    real presnivs(llm) ! pressions approximatives des milieux de couches, en Pa    real presnivs(llm) ! pressions approximatives des milieux de couches, en Pa
12    real, parameter:: preff = 101325. ! in Pa    real, parameter:: preff = 101325. ! in Pa
13    real nivsigs(llm), nivsig(llm+1)    real nivsigs(llm), nivsig(llm+1)
# Line 19  contains Line 19  contains
19    SUBROUTINE disvert    SUBROUTINE disvert
20    
21      ! 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
22      ! Auteur : P. Le Van      ! Author: P. Le Van
23    
24      ! This procedure sets the vertical grid.      ! This procedure sets the vertical grid. It defines the host
25      ! It defines the host variables "ap", "bp", "dpres", "presnivs",      ! variables "ap", "bp", "presnivs", "nivsigs" and "nivsig". "pa"
26      ! "nivsigs" and "nivsig".      ! should be defined before this procedure is called.
     ! "pa" should be defined before this procedure is called.  
27    
28      use numer_rec, only: pi      use jumble, only: new_unit
29        use nr_util, only: pi
30        use unit_nml_m, only: unit_nml
31    
32        ! Local:
33    
34      REAL s(llm+1)      REAL s(llm+1)
35      ! "s(l)" is the atmospheric hybrid sigma-pressure coordinate at      ! "s(l)" is the atmospheric hybrid sigma-pressure coordinate at
# Line 35  contains Line 38  contains
38      real ds(llm)      real ds(llm)
39      ! "ds(l)" : épaisseur de la couche "l" dans la coordonnée "s"      ! "ds(l)" : épaisseur de la couche "l" dans la coordonnée "s"
40    
41      INTEGER l      INTEGER l, unit
42      REAL alpha, x(llm)      REAL alpha, x(llm)
43    
44      character(len=7):: s_sampling = "LMD5"      character(len=7):: s_sampling = "tropo"
45      ! (other allowed values are "param", "strato1" and "strato2")      ! (other allowed values are "param", "strato1", "strato" and "read")
46    
47      real:: h = 7. ! scale height, in km      real:: h = 7. ! scale height, in km
48      ! (used only if "s_sampling" == "param" or "strato1")      ! (used only if "s_sampling" == "param" or "strato1")
# Line 63  contains Line 66  contains
66    
67      ! Compute "s":      ! Compute "s":
68    
     s(1) = 1.  
     s(llm+1) = 0.  
   
69      print *, "Enter namelist 'disvert_nml'."      print *, "Enter namelist 'disvert_nml'."
70      read(unit=*, nml=disvert_nml)      read(unit=*, nml=disvert_nml)
71      write(unit=*, nml=disvert_nml)      write(unit_nml, nml=disvert_nml)
72    
73      select case (s_sampling)      select case (s_sampling)
74      case ("param")      case ("param")
75           s(1) = 1.
76           s(llm+1) = 0.
77         alpha = deltaz / tanh(1./k0) * 2.         alpha = deltaz / tanh(1./k0) * 2.
78         forall (l = 2: llm) s(l) &         forall (l = 2: llm) s(l) &
79              = cosh((l - 1) / k0) **(- alpha * k0 / h) &              = cosh((l - 1) / k0) **(- alpha * k0 / h) &
80              * exp(- alpha / h * tanh((llm - k1) / k0) &              * exp(- alpha / h * tanh((llm - k1) / k0) &
81              * beta **(l - 1 - (llm - k1)) / log(beta))              * beta **(l - 1 - (llm - k1)) / log(beta))
82      case ("LMD5")      case ("tropo")
83         ! Ancienne discrétisation         s(1) = 1.
84           s(llm+1) = 0.
85         forall (l = 1: llm) ds(l) &         forall (l = 1: llm) ds(l) &
86              = 1. + 7. * SIN(pi * (REAL(l)-0.5) / real(llm+1))**2              = 1. + 7. * SIN(pi * (REAL(l) - 0.5) / real(llm + 1))**2
87         ds = ds / sum(ds)         ds = ds / sum(ds)
88    
89         DO l = llm, 2, -1         DO l = llm, 2, -1
# Line 88  contains Line 91  contains
91         ENDDO         ENDDO
92      case ("strato1")      case ("strato1")
93         ! F. Lott 70 niveaux et plus         ! F. Lott 70 niveaux et plus
94           s(1) = 1.
95           s(llm+1) = 0.
96         forall (l = 1: llm) dz(l) = 1.56 + TANH(REAL(l - 12) / 5.) &         forall (l = 1: llm) dz(l) = 1.56 + TANH(REAL(l - 12) / 5.) &
97                 + TANH(REAL(l - llm) / 10.) / 2.                 + TANH(REAL(l - llm) / 10.) / 2.
98    
# Line 98  contains Line 103  contains
103    
104         s(2:llm) = (exp(- zz(2:llm) / h) - exp(- zz(llm + 1) / h)) &         s(2:llm) = (exp(- zz(2:llm) / h) - exp(- zz(llm + 1) / h)) &
105              / (1. - exp(- zz(llm + 1) / h))              / (1. - exp(- zz(llm + 1) / h))
106      case ("strato2")      case ("strato")
107         ! Recommended by F. Lott for a domain including the stratosphere         ! Recommended by F. Lott for a domain including the stratosphere
108           s(1) = 1.
109           s(llm+1) = 0.
110         forall (l = 1: llm) x(l) = pi * (l - 0.5) / (llm + 1)         forall (l = 1: llm) x(l) = pi * (l - 0.5) / (llm + 1)
111    
112         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.
113         ds = ds / sum(ds)         ds = ds / sum(ds)
114    
115         DO l = llm, 2, -1         DO l = llm, 2, -1
116            s(l) = s(l+1) + ds(l)            s(l) = s(l+1) + ds(l)
117         ENDDO         ENDDO
118        case("read")
119           call new_unit(unit)
120           open(unit, file="hybrid.csv", status="old", action="read", &
121                position="rewind")
122           read(unit, fmt=*) ! skip title line
123           do l = 1, llm + 1
124              read(unit, fmt=*) s(l)
125           end do
126           close(unit)
127           ! Quick check:
128           if (s(1) /= 1. .or. s(llm + 1) /= 0. .or. s(1) <= s(2)) then
129              print *, '"s" should be in descending order, from 1 to 0.'
130              stop 1
131           end if
132      case default      case default
133         print *, 'Wrong value for "s_sampling"'         print *, 'Wrong value for "s_sampling"'
134         stop 1         stop 1
# Line 118  contains Line 139  contains
139      bp(llm + 1) = 0.      bp(llm + 1) = 0.
140      ap = pa * (s - bp)      ap = pa * (s - bp)
141    
142      forall (l = 1: llm)      forall (l = 1: llm) presnivs(l) = 0.5 &
143         dpres(l) = bp(l) - bp(l+1)           * (ap(l) + bp(l) * preff + ap(l+1) + bp(l+1) * preff)
        presnivs(l) = 0.5 * (ap(l) + bp(l) * preff + ap(l+1) + bp(l+1) * preff)  
     end forall  
144    
145    END SUBROUTINE disvert    END SUBROUTINE disvert
146    
147  end module comvert  end module disvert_m
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