source: LMDZ6/branches/contrails/libf/phylmd/surf_param_mod.F90 @ 5779

Last change on this file since 5779 was 5717, checked in by aborella, 5 months ago

Merge with trunk r5653
File size: 6.9 KB
Line 
1MODULE surf_param_mod
2!
3  IMPLICIT NONE
4!
5CONTAINS
6!
7!-------------------------------------------------------------------------------
8!
9FUNCTION eff_surf_param(klon, nbtersurf, x, frac, hatype, Zref) RESULT(eff_param)
10!
11!-------------------------------------------------------------------------------
12!
13! Arguments:
14  INTEGER, INTENT(IN)                          :: klon       ! grid point
15  INTEGER, INTENT(IN)                          :: nbtersurf  ! number of land hetero. subsurfaces
16  REAL, DIMENSION(klon, nbtersurf), INTENT(IN) :: x          ! variable or parameter to integrate
17  REAL, DIMENSION(klon, nbtersurf), INTENT(IN) :: frac       ! fraction of each land hetero. subsurface
18  CHARACTER(LEN=3), INTENT(IN)                 :: hatype     ! method to integrate the parameter
19  REAL, OPTIONAL, DIMENSION(klon), INTENT(IN)  :: Zref       ! reference height for CDN averaging (m)
20  REAL, DIMENSION(klon)                        :: eff_param  ! effective parameter
21!-------------------------------------------------------------------------------
22! Local variables:
23  INTEGER ik, is
24  REAL :: zrefd = 10.  ! default reference height for CDN averaging (m)
25  REAL :: Cdref        ! reference height for CDN averaging (m)
26!-------------------------------------------------------------------------------
27!
28  eff_param(:) = 0.
29  DO ik = 1, klon
30    DO is = 1, nbtersurf
31      !
32      ! arithmetic averaging
33      IF (hatype == 'ARI') THEN
34        eff_param(ik) = eff_param(ik) + frac(ik,is) * x(ik,is)
35      !
36      ! inverse averaging
37      ELSEIF (hatype == 'INV') THEN
38        IF (x(ik,is) .NE. 0.) THEN
39          eff_param(ik) = eff_param(ik) + frac(ik,is) * 1./x(ik,is)
40        ENDIF
41      !
42      ! inverse of square logarithm averaging
43      ELSEIF (hatype == 'CDN') THEN
44        IF (PRESENT(Zref)) THEN
45          Cdref = Zref(ik)
46        ELSE
47          Cdref = zrefd
48        ENDIF
49      !
50        IF (x(ik,is) .NE. 0.) THEN
51          eff_param(ik) = eff_param(ik) + frac(ik,is) * 1./(LOG(Cdref/x(ik,is)))**2
52        ENDIF
53      !
54      ELSE
55        PRINT*, 'eff_surf_param: invalid averaging type: ', hatype
56      ENDIF
57    ENDDO
58    !
59    IF (hatype == 'CDN') THEN
60      eff_param(ik) = Cdref * exp(-sqrt(1./eff_param(ik)))
61    ENDIF
62  !
63  ENDDO
64!
65END FUNCTION eff_surf_param
66!
67!
68!-------------------------------------------------------------------------------
69!
70FUNCTION average_surf_var(klon, nbtersurf, x, frac, hatype) RESULT(x_avg)
71!
72!-------------------------------------------------------------------------------
73!
74! Arguments:
75  INTEGER, INTENT(IN)                          :: klon       ! grid point
76  INTEGER, INTENT(IN)                          :: nbtersurf  ! number of land hetero. subsurfaces
77  REAL, DIMENSION(klon, nbtersurf), INTENT(IN) :: x          ! variable or parameter to integrate
78  REAL, DIMENSION(klon, nbtersurf), INTENT(IN) :: frac       ! fraction of each land hetero. subsurface
79  CHARACTER(LEN=3), INTENT(IN)                 :: hatype     ! method to integrate the parameter
80  REAL, DIMENSION(klon)                        :: x_avg      ! average variable
81!
82! Local variables:
83  INTEGER ik, is
84!
85!-------------------------------------------------------------------------------
86!
87  x_avg(:) = 0.
88  DO ik = 1, klon
89    DO is = 1, nbtersurf
90      !
91      ! arithmetic averaging
92      IF (hatype == 'ARI') THEN
93        x_avg(ik) = x_avg(ik) + frac(ik,is) * x(ik,is)
94      ELSE
95        PRINT*, 'average_surf_var: invalid averaging type: ', hatype
96      ENDIF
97    ENDDO
98  ENDDO
99!
100END FUNCTION average_surf_var
101!
102!-------------------------------------------------------------------------------
103!
104FUNCTION interpol_tsoil(klon, nbtersurf, nsoilmx, nbtsoildepths, alpha, period, inertie, hcond, tsoil_depth, tsurf, tsoil_) RESULT(tsoil)
105!
106!-------------------------------------------------------------------------------
107!
108! Arguments:
109  INTEGER, INTENT(IN)                                         :: klon          ! grid point
110  INTEGER, INTENT(IN)                                         :: nbtersurf     ! number of land hetero. subsurfaces
111  INTEGER, INTENT(IN)                                         :: nsoilmx       ! number of soil layers in the model grid
112  INTEGER, INTENT(IN)                                         :: nbtsoildepths ! number of soil depths for soil temperature initialization
113  REAL, INTENT(IN)                                            :: alpha         ! parameter for soil discretization
114  REAL, INTENT(IN)                                            :: period        ! parameter for soil discretization
115  REAL, DIMENSION(klon, nbtersurf), INTENT(IN)                :: inertie       ! soil thermal inertia
116  REAL, DIMENSION(klon, nbtersurf), INTENT(IN)                :: hcond         ! soil heat conductivity
117  REAL, DIMENSION(klon, nbtsoildepths, nbtersurf), INTENT(IN) :: tsoil_depth   ! soil depth at which temperature is given (m)
118  REAL, DIMENSION(klon, nbtersurf), INTENT(IN)                :: tsurf         ! surface temperature
119  REAL, DIMENSION(klon, nbtsoildepths, nbtersurf), INTENT(IN) :: tsoil_        ! soil temperature given at tsoil_depths
120  REAL, DIMENSION(klon, nsoilmx, nbtersurf)                   :: tsoil         ! soil temperature interpolated in the model grid
121!
122! Local variables:
123  INTEGER ik, is, iq, it
124  REAL pi, slope, inter
125  REAL, DIMENSION(klon, nbtersurf)          :: z1, hcap  ! first layer depth and soil heat capacity
126  REAL, DIMENSION(klon, nsoilmx, nbtersurf) :: z         ! depth of the middle of the soil layer in the model grid (m)
127!
128!-------------------------------------------------------------------------------
129!
130  pi = ACOS(-1.)
131  !
132  DO ik = 1, klon
133    DO is = 1, nbtersurf
134      !
135      hcap(ik,is) = inertie(ik,is)*inertie(ik,is)/hcond(ik,is)
136      z1(ik,is) = SQRT(period*hcond(ik,is)/(pi*hcap(ik,is)))
137      !
138      DO iq = 1, nsoilmx
139        ! compute depth of middle soil layer (in m)
140        z(ik,iq,is) = z1(ik,is) * (alpha**(iq-0.5) - 1.) / (alpha - 1.)
141        ! if z is between the surface and first tsoil_depth
142        IF ((z(ik,iq,is) .GT. 0.) .AND. (z(ik,iq,is) .LE. tsoil_depth(ik,1,is))) THEN
143          slope = (tsoil_(ik,1,is) - tsurf(ik,is)) / (tsoil_depth(ik,1,is) - 0.)
144          inter = tsurf(ik,is)
145          tsoil(ik,iq,is) = slope * z(ik,iq,is) + inter
146        ENDIF
147        ! other levels
148        DO it = 1, nbtsoildepths-1
149          IF ((z(ik,iq,is) .GT. tsoil_depth(ik,it,is)) .AND. (z(ik,iq,is) .LE. tsoil_depth(ik,it+1,is))) THEN
150            slope = (tsoil_(ik,it+1,is) - tsoil_(ik,it,is)) / (tsoil_depth(ik,it+1,is) - tsoil_depth(ik,it,is))
151            inter = tsoil_(ik,it,is) - slope * tsoil_depth(ik,it,is)
152            tsoil(ik,iq,is) = slope * z(ik,iq,is) + inter
153          ENDIF
154        ENDDO
155        ! for layers below
156        IF (z(ik,iq,is) .GT. tsoil_depth(ik,nbtsoildepths,is)) THEN
157          tsoil(ik,iq,is) = tsoil_(ik,nbtsoildepths,is)
158        ENDIF
159      ENDDO
160      !
161    ENDDO
162  ENDDO
163!
164END FUNCTION interpol_tsoil
165!
166!-------------------------------------------------------------------------------
167!
168END MODULE surf_param_mod
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