1 | MODULE disvert_dcmip31_mod |
---|
2 | USE icosa |
---|
3 | |
---|
4 | REAL(rstd), SAVE, ALLOCATABLE,TARGET :: ap(:) |
---|
5 | REAL(rstd), SAVE, ALLOCATABLE,TARGET :: bp(:) |
---|
6 | REAL(rstd), SAVE, ALLOCATABLE,TARGET :: presnivs(:) |
---|
7 | |
---|
8 | CONTAINS |
---|
9 | !========================================================================= |
---|
10 | |
---|
11 | SUBROUTINE init_disvert |
---|
12 | USE icosa |
---|
13 | IMPLICIT NONE |
---|
14 | |
---|
15 | ALLOCATE(ap(llm+1)) |
---|
16 | ALLOCATE(bp(llm+1)) |
---|
17 | ALLOCATE(presnivs(llm)) |
---|
18 | |
---|
19 | CALL disvert(ap,bp,presnivs) |
---|
20 | |
---|
21 | END SUBROUTINE init_disvert |
---|
22 | |
---|
23 | SUBROUTINE disvert(ap,bp,presnivs) |
---|
24 | USE icosa |
---|
25 | IMPLICIT NONE |
---|
26 | REAL(rstd),INTENT(OUT) :: ap(:) |
---|
27 | REAL(rstd),INTENT(OUT) :: bp(:) |
---|
28 | REAL(rstd),INTENT(OUT) :: presnivs(:) |
---|
29 | ! reads from run.def : ncar_dz, ncar_T0, ncar_p0, ncar_disvert_c |
---|
30 | INTEGER :: l,cindx |
---|
31 | REAL(rstd) :: GG, eta_top, eta |
---|
32 | REAL(rstd),PARAMETER :: N=0.01 ! Brunt-Vaisala frequency (s-1) |
---|
33 | REAL(rstd),PARAMETER :: Teq=300. ! Surface temperature at the equator (K) |
---|
34 | REAL(rstd),PARAMETER :: Peq=1e5 ! Reference surface pressure at the equator (hPa) |
---|
35 | |
---|
36 | ncar_dz=400 ; CALL getin('ncar_dz',ncar_dz); |
---|
37 | cindx=1 ; CALL getin('ncar_disvert_c',cindx) |
---|
38 | |
---|
39 | GG=(g/N)**2/cpp |
---|
40 | |
---|
41 | eta_top = (GG/Teq*exp(-N**2*llm*ncar_dz/g)+1-GG/Teq)**(1./kappa) |
---|
42 | PRINT *,'eta_top ->', eta_top |
---|
43 | do l = 1,llm+1 |
---|
44 | eta = (GG/Teq*exp(-N**2*(l-1)*ncar_dz/g)+1-GG/Teq)**(1./kappa) |
---|
45 | PRINT *,'eta ->', eta |
---|
46 | bp(l) = ((eta - eta_top)/(1 - eta_top))**cindx |
---|
47 | ap(l) = preff * ( eta - bp(l) ) |
---|
48 | ENDDO |
---|
49 | PRINT *,'eta ->', eta |
---|
50 | bp(1)=1. |
---|
51 | ap(1)=0. |
---|
52 | bp(llm+1) = 0 |
---|
53 | |
---|
54 | DO l = 1, llm |
---|
55 | presnivs(l) = 0.5 *( ap(l)+bp(l)*preff + ap(l+1)+bp(l+1)*preff ) |
---|
56 | ENDDO |
---|
57 | |
---|
58 | PRINT *, 'Vertical placement of model levels according to DCMIP Appendix E.3' |
---|
59 | PRINT *, 'Parameters : ncar_dz=', ncar_dz, ' ncar_p0=',ncar_p0, ' ncar_disvert_c=',cindx |
---|
60 | PRINT *, 'Isothermal amtosphere with ncar_T0=',ncar_T0 |
---|
61 | |
---|
62 | END SUBROUTINE disvert |
---|
63 | |
---|
64 | END MODULE disvert_dcmip31_mod |
---|