source: trunk/LMDZ.PLUTO/libf/phypluto/optci.F90 @ 3506

Last change on this file since 3506 was 3184, checked in by afalco, 10 months ago

Pluto PCM:
Added LMDZ.PLUTO, a copy of the generic model,
cleaned from some unnecessary modules (water, ...)
AF

File size: 14.8 KB
Line 
1MODULE optci_mod
2
3IMPLICIT NONE
4
5CONTAINS
6
7subroutine optci(PLEV,TLEV,DTAUI,TAUCUMI,      &
8     QXIAER,QSIAER,GIAER,COSBI,WBARI,TAUAERO,  &
9     TMID,PMID,TAUGSURF,QVAR,MUVAR)
10
11  use radinc_h, only: L_LEVELS, L_NLAYRAD, L_NSPECTI, L_NGAUSS, &
12                      L_NLEVRAD, L_REFVAR, naerkind
13  use radcommon_h, only: gasi,tlimit,wrefVAR,Cmk,tgasref,pfgasref,wnoi,scalep,indi,glat_ig
14  use gases_h, only: gfrac, ngasmx, igas_N2, igas_He, igas_H2O, igas_H2, &
15                     igas_CH4, igas_N2
16  use comcstfi_mod, only: g, r, mugaz
17  use callkeys_mod, only: kastprof,continuum,graybody
18  use recombin_corrk_mod, only: corrk_recombin, gasi_recomb
19  use tpindex_mod, only: tpindex
20
21  implicit none
22
23  !==================================================================
24  !     
25  !     Purpose
26  !     -------
27  !     Calculates longwave optical constants at each level. For each
28  !     layer and spectral interval in the IR it calculates WBAR, DTAU
29  !     and COSBAR. For each level it calculates TAU.
30  !     
31  !     TAUCUMI(L,LW) is the cumulative optical depth at level L (or alternatively
32  !     at the *bottom* of layer L), LW is the spectral wavelength interval.
33  !     
34  !     TLEV(L) - Temperature at the layer boundary (i.e., level)
35  !     PLEV(L) - Pressure at the layer boundary (i.e., level)
36  !
37  !     Authors
38  !     -------
39  !     Adapted from the NASA Ames code by R. Wordsworth (2009)
40  !     
41  !==================================================================
42
43
44  real*8,intent(out) :: DTAUI(L_NLAYRAD,L_NSPECTI,L_NGAUSS)
45  real*8 DTAUKI(L_LEVELS,L_NSPECTI,L_NGAUSS)
46  real*8 TAUI(L_NLEVRAD,L_NSPECTI,L_NGAUSS)
47  real*8,intent(out) :: TAUCUMI(L_LEVELS,L_NSPECTI,L_NGAUSS)
48  real*8,intent(in) :: PLEV(L_LEVELS)
49  real*8,intent(in) :: TLEV(L_LEVELS) ! not used
50  real*8,intent(in) :: TMID(L_LEVELS)
51  real*8,intent(in) :: PMID(L_LEVELS)
52  real*8,intent(out) :: COSBI(L_NLAYRAD,L_NSPECTI,L_NGAUSS)
53  real*8,intent(out) :: WBARI(L_NLAYRAD,L_NSPECTI,L_NGAUSS)
54
55  ! for aerosols
56  real*8,intent(in) ::  QXIAER(L_LEVELS,L_NSPECTI,NAERKIND)
57  real*8,intent(in) ::  QSIAER(L_LEVELS,L_NSPECTI,NAERKIND)
58  real*8,intent(in) ::  GIAER(L_LEVELS,L_NSPECTI,NAERKIND)
59  real*8,intent(in) ::  TAUAERO(L_LEVELS,NAERKIND)
60
61  ! local variables (saved for convenience as need be allocated)
62  real*8,save,allocatable :: TAUAEROLK(:,:,:)
63  real*8,save,allocatable :: TAEROS(:,:,:)
64!$OMP THREADPRIVATE(TAUAEROLK,TAEROS)
65
66  integer L, NW, NG, K, LK, IAER
67  integer MT(L_LEVELS), MP(L_LEVELS), NP(L_LEVELS)
68  real*8  ANS, TAUGAS
69  real*8  DPR(L_LEVELS), U(L_LEVELS)
70  real*8  LCOEF(4), LKCOEF(L_LEVELS,4)
71
72  real*8,intent(out) :: taugsurf(L_NSPECTI,L_NGAUSS-1)
73  real*8 DCONT,DAERO
74  double precision wn_cont, p_cont, p_air, T_cont, dtemp, dtempc
75  double precision p_cross
76
77  ! variable species mixing ratio variables
78  real*8,intent(in) :: QVAR(L_LEVELS)
79  real*8,intent(in) :: MUVAR(L_LEVELS)
80  real*8  WRATIO(L_LEVELS)
81  real*8  KCOEF(4)
82  integer NVAR(L_LEVELS)
83 
84  ! temporary variables to reduce memory access time to gasi
85  real*8 tmpk(2,2)
86  real*8 tmpkvar(2,2,2)
87
88  ! temporary variables for multiple aerosol calculation
89  real*8 atemp
90  real*8 btemp(L_NLAYRAD,L_NSPECTI)
91
92  ! variables for k in units m^-1
93  real*8 dz(L_LEVELS)
94  !real*8 rho !! see test below
95
96  integer igas, jgas
97
98  integer interm
99 
100  logical :: firstcall=.true.
101!$OMP THREADPRIVATE(firstcall)
102
103  !--- Kasting's CIA ----------------------------------------
104  !real*8, parameter :: Ci(L_NSPECTI)=[                         &
105  !     3.8E-5, 1.2E-5, 2.8E-6, 7.6E-7, 4.5E-7, 2.3E-7,    &
106  !     5.4E-7, 1.6E-6, 0.0,                               &
107  !     0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0,            &
108  !     0.0, 4.0E-7, 4.0E-6, 1.4E-5,    &
109  !     1.0E-5, 1.2E-6, 2.0E-7, 5.0E-8, 3.0E-8, 0.0 ]
110  !real*8, parameter :: Ti(L_NSPECTI)=[ -2.2, -1.9,             &
111  !     -1.7, -1.7, -1.7, -1.7, -1.7, -1.7,                &
112  !     0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, &
113  !     -1.7,-1.7,-1.7,-1.7,-1.7,-1.7,-1.7, -1.7,0.0 ]
114  !----------------------------------------------------------
115
116  if (firstcall) then
117    ! allocate local arrays of size "naerkind" (which are also
118    ! "saved" so that this is done only once in for all even if
119    ! we don't need to store the value from a time step to the next)
120    allocate(TAUAEROLK(L_LEVELS,L_NSPECTI,NAERKIND))
121    allocate(TAEROS(L_LEVELS,L_NSPECTI,NAERKIND))
122    firstcall=.false.
123  endif ! of if (firstcall)
124
125  !! AS: to save time in computing continuum (see bilinearbig)
126  IF (.not.ALLOCATED(indi)) THEN
127      ALLOCATE(indi(L_NSPECTI,ngasmx,ngasmx))
128      indi = -9999  ! this initial value means "to be calculated"
129  ENDIF
130
131  !=======================================================================
132  !     Determine the total gas opacity throughout the column, for each
133  !     spectral interval, NW, and each Gauss point, NG.
134
135  taugsurf(:,:) = 0.0
136  dpr(:)        = 0.0
137  lkcoef(:,:)   = 0.0
138
139  do K=2,L_LEVELS
140     DPR(k) = PLEV(K)-PLEV(K-1)
141
142     !--- Kasting's CIA ----------------------------------------
143     !dz(k)=dpr(k)*189.02*TMID(K)/(0.03720*PMID(K))
144     ! this is N2 path length (in cm) as written by Francois
145     ! delta_z = delta_p * R_specific * T / (g * P)
146     ! But Kasting states that W is in units of _atmosphere_ cm
147     ! So we do
148     !dz(k)=dz(k)*(PMID(K)/1013.25)
149     !dz(k)=dz(k)/100.0 ! in m for SI calc
150     !----------------------------------------------------------
151
152     ! if we have continuum opacities, we need dz
153     if(kastprof)then
154        dz(k) = dpr(k)*(1000.0d0*8.3145d0/muvar(k))*TMID(K)/(g*PMID(K))
155        U(k)  = Cmk*DPR(k)*mugaz/muvar(k)
156     else
157        dz(k) = dpr(k)*R*TMID(K)/(glat_ig*PMID(K))*mugaz/muvar(k)
158        U(k)  = Cmk*DPR(k)*mugaz/muvar(k)     ! only Cmk line in optci.F 
159            !JL13 the mugaz/muvar factor takes into account water meanmolecular weight if water is present
160     endif
161
162     call tpindex(PMID(K),TMID(K),QVAR(K),pfgasref,tgasref,WREFVAR, &
163          LCOEF,MT(K),MP(K),NVAR(K),WRATIO(K))
164
165     do LK=1,4
166        LKCOEF(K,LK) = LCOEF(LK)
167     end do
168  end do                    ! levels
169
170  ! Spectral dependance of aerosol absorption
171  do iaer=1,naerkind
172     DO NW=1,L_NSPECTI
173        do K=2,L_LEVELS
174           TAEROS(K,NW,IAER) = TAUAERO(K,IAER) * QXIAER(K,NW,IAER)
175        end do                    ! levels
176     END DO
177  end do
178
179  do NW=1,L_NSPECTI
180
181     do K=2,L_LEVELS
182     
183        DAERO=SUM(TAEROS(K,NW,1:naerkind)) ! aerosol absorption
184
185        DCONT = 0.0d0 ! continuum absorption
186
187        if(continuum.and.(.not.graybody))then
188           ! include continua if necessary
189           wn_cont = dble(wnoi(nw))
190           T_cont  = dble(TMID(k))
191           do igas=1,ngasmx
192
193              if(gfrac(igas).eq.-1)then ! variable
194                 p_cont  = dble(PMID(k)*scalep*QVAR(k)) ! qvar = mol/mol
195              else
196                 p_cont  = dble(PMID(k)*scalep*gfrac(igas)*(1.-QVAR(k)))
197              endif
198
199              dtemp=0.0d0
200              if(igas.eq.igas_N2)then
201
202                 interm = indi(nw,igas,igas)
203                 call interpolateN2N2(wn_cont,T_cont,p_cont,dtemp,.false.,interm)
204                 indi(nw,igas,igas) = interm
205
206            !   elseif(igas.eq.igas_H2)then !AF24: removed
207
208              elseif(igas.eq.igas_CH4)then
209
210                 ! first do self-induced absorption
211                 interm = indi(nw,igas,igas)
212                 call interpolateCH4CH4(wn_cont,T_cont,p_cont,dtemp,.false.,interm)
213                 indi(nw,igas,igas) = interm
214
215                 ! then cross-interactions with other gases !AF24: removed
216
217            !   elseif(igas.eq.igas_H2O.and.T_cont.gt.100.0)then !AF24: removed
218
219              endif
220              DCONT = DCONT + dtemp
221           enddo
222
223           ! Oobleck test
224           !rho = PMID(k)*scalep / (TMID(k)*286.99)
225           !if(WNOI(nw).gt.300.0 .and. WNOI(nw).lt.500.0)then
226           !   DCONT = rho * 0.125 * 4.6e-4
227           !elseif(WNOI(nw).gt.500.0 .and. WNOI(nw).lt.700.0)then
228           !   DCONT = 1000*dpr(k) * 1.0 * 4.6e-4 / g
229           !   DCONT = rho * 1.0 * 4.6e-4
230           !elseif(WNOI(nw).gt.700.0 .and. WNOI(nw).lt.900.0)then
231           !   DCONT = rho * 0.125 * 4.6e-4
232           !endif
233
234           DCONT = DCONT*dz(k)
235
236        endif
237
238        do ng=1,L_NGAUSS-1
239
240           ! Now compute TAUGAS
241
242           ! Interpolate between water mixing ratios
243           ! WRATIO = 0.0 if the requested water amount is equal to, or outside the
244           ! the water data range
245
246           if(L_REFVAR.eq.1)then ! added by RW for special no variable case
247           
248              ! JVO 2017 : added tmpk because the repeated calls to gasi/v increased dramatically
249              ! the execution time of optci/v -> ~ factor 2 on the whole radiative
250              ! transfer on the tested simulations !
251
252              IF (corrk_recombin) THEN ! added by JVO
253                tmpk = GASI_RECOMB(MT(K):MT(K)+1,MP(K):MP(K)+1,1,NW,NG) ! contains the mix of recombined species
254              ELSE
255                tmpk = GASI(MT(K):MT(K)+1,MP(K):MP(K)+1,1,NW,NG)
256              ENDIF
257
258              KCOEF(1) = tmpk(1,1) ! KCOEF(1) = GASI(MT(K),MP(K),1,NW,NG)
259              KCOEF(2) = tmpk(1,2) ! KCOEF(2) = GASI(MT(K),MP(K)+1,1,NW,NG)
260              KCOEF(3) = tmpk(2,2) ! KCOEF(3) = GASI(MT(K)+1,MP(K)+1,1,NW,NG)
261              KCOEF(4) = tmpk(2,1) ! KCOEF(4) = GASI(MT(K)+1,MP(K),1,NW,NG)
262
263           else
264
265              IF (corrk_recombin) THEN ! added by JVO
266                tmpkvar = GASI_RECOMB(MT(K):MT(K)+1,MP(K):MP(K)+1,NVAR(K):NVAR(K)+1,NW,NG)
267              ELSE
268                tmpkvar = GASI(MT(K):MT(K)+1,MP(K):MP(K)+1,NVAR(K):NVAR(K)+1,NW,NG)
269              ENDIF
270
271              KCOEF(1) = tmpkvar(1,1,1) + WRATIO(K) *  &
272                        ( tmpkvar(1,1,2)-tmpkvar(1,1,1) )
273
274              KCOEF(2) = tmpkvar(1,2,1) + WRATIO(K) *  &
275                        ( tmpkvar(1,2,2)-tmpkvar(1,2,1) )
276
277              KCOEF(3) = tmpkvar(2,2,1) + WRATIO(K) *  &
278                        ( tmpkvar(2,2,2)-tmpkvar(2,2,1) )
279             
280              KCOEF(4) = tmpkvar(2,1,1) + WRATIO(K) *  &
281                        ( tmpkvar(2,1,2)-tmpkvar(2,1,1) )
282
283           endif
284
285           ! Interpolate the gaseous k-coefficients to the requested T,P values
286
287           ANS = LKCOEF(K,1)*KCOEF(1) + LKCOEF(K,2)*KCOEF(2) +            &
288                LKCOEF(K,3)*KCOEF(3) + LKCOEF(K,4)*KCOEF(4)
289
290           TAUGAS  = U(k)*ANS
291
292           TAUGSURF(NW,NG) = TAUGSURF(NW,NG) + TAUGAS + DCONT
293           DTAUKI(K,nw,ng) = TAUGAS    &
294                             + DCONT   & ! For parameterized continuum absorption
295                             + DAERO     ! For aerosol absorption
296
297        end do
298
299        ! Now fill in the "clear" part of the spectrum (NG = L_NGAUSS),
300        ! which holds continuum opacity only
301
302        NG              = L_NGAUSS
303        DTAUKI(K,nw,ng) = 0.d0      &
304                          + DCONT   & ! For parameterized continuum absorption
305                          + DAERO     ! For aerosol absorption
306
307     end do
308  end do
309
310  !=======================================================================
311  !     Now the full treatment for the layers, where besides the opacity
312  !     we need to calculate the scattering albedo and asymmetry factors
313
314  do iaer=1,naerkind
315    DO NW=1,L_NSPECTI
316     DO K=2,L_LEVELS
317           TAUAEROLK(K,NW,IAER) = TAUAERO(K,IAER)*QSIAER(K,NW,IAER) ! effect of scattering albedo
318     ENDDO
319    ENDDO
320  end do
321 
322  DO NW=1,L_NSPECTI
323     DO L=1,L_NLAYRAD-1
324        K              = 2*L+1
325        btemp(L,NW) = SUM(TAUAEROLK(K,NW,1:naerkind)) + SUM(TAUAEROLK(K+1,NW,1:naerkind))
326     END DO ! L vertical loop
327     
328     ! Last level
329     L           = L_NLAYRAD
330     K           = 2*L+1   
331     btemp(L,NW) = SUM(TAUAEROLK(K,NW,1:naerkind))
332     
333  END DO                    ! NW spectral loop
334 
335
336  DO NW=1,L_NSPECTI
337     NG = L_NGAUSS
338     DO L=1,L_NLAYRAD-1
339
340        K              = 2*L+1
341        DTAUI(L,nw,ng) = DTAUKI(K,NW,NG) + DTAUKI(K+1,NW,NG)! + 1.e-50
342
343        atemp = 0.
344        if(DTAUI(L,NW,NG) .GT. 1.0D-9) then
345           do iaer=1,naerkind
346              atemp = atemp +                                     &
347                   GIAER(K,NW,IAER)   * TAUAEROLK(K,NW,IAER) +    &
348                   GIAER(K+1,NW,IAER) * TAUAEROLK(K+1,NW,IAER)
349           end do
350           WBARI(L,nw,ng) = btemp(L,nw)  / DTAUI(L,NW,NG)
351        else
352           WBARI(L,nw,ng) = 0.0D0
353           DTAUI(L,NW,NG) = 1.0D-9
354        endif
355
356        if(btemp(L,nw) .GT. 0.0d0) then
357           cosbi(L,NW,NG) = atemp/btemp(L,nw)
358        else
359           cosbi(L,NW,NG) = 0.0D0
360        end if
361
362     END DO ! L vertical loop
363     
364     ! Last level
365     
366     L              = L_NLAYRAD
367     K              = 2*L+1
368     DTAUI(L,nw,ng) = DTAUKI(K,NW,NG) ! + 1.e-50
369
370     atemp = 0.
371     if(DTAUI(L,NW,NG) .GT. 1.0D-9) then
372        do iaer=1,naerkind
373           atemp = atemp + GIAER(K,NW,IAER)   * TAUAEROLK(K,NW,IAER)
374        end do
375        WBARI(L,nw,ng) = btemp(L,nw)  / DTAUI(L,NW,NG)
376     else
377        WBARI(L,nw,ng) = 0.0D0
378        DTAUI(L,NW,NG) = 1.0D-9
379     endif
380
381     if(btemp(L,nw) .GT. 0.0d0) then
382        cosbi(L,NW,NG) = atemp/btemp(L,nw)
383     else
384        cosbi(L,NW,NG) = 0.0D0
385     end if
386     
387
388     ! Now the other Gauss points, if needed.
389
390     DO NG=1,L_NGAUSS-1
391        IF(TAUGSURF(NW,NG) .gt. TLIMIT) THEN
392
393           DO L=1,L_NLAYRAD-1
394              K              = 2*L+1
395              DTAUI(L,nw,ng) = DTAUKI(K,NW,NG)+DTAUKI(K+1,NW,NG)! + 1.e-50
396
397              if(DTAUI(L,NW,NG) .GT. 1.0D-9) then
398
399                 WBARI(L,nw,ng) = btemp(L,nw)  / DTAUI(L,NW,NG)
400
401              else
402                 WBARI(L,nw,ng) = 0.0D0
403                 DTAUI(L,NW,NG) = 1.0D-9
404              endif
405
406              cosbi(L,NW,NG) = cosbi(L,NW,L_NGAUSS)
407           END DO ! L vertical loop
408           
409           ! Last level
410           L              = L_NLAYRAD
411           K              = 2*L+1
412           DTAUI(L,nw,ng) = DTAUKI(K,NW,NG)! + 1.e-50
413
414           if(DTAUI(L,NW,NG) .GT. 1.0D-9) then
415
416              WBARI(L,nw,ng) = btemp(L,nw)  / DTAUI(L,NW,NG)
417
418           else
419              WBARI(L,nw,ng) = 0.0D0
420              DTAUI(L,NW,NG) = 1.0D-9
421           endif
422
423           cosbi(L,NW,NG) = cosbi(L,NW,L_NGAUSS)
424           
425        END IF
426
427     END DO                 ! NG Gauss loop
428  END DO                    ! NW spectral loop
429
430  ! Total extinction optical depths
431
432  DO NG=1,L_NGAUSS       ! full gauss loop
433     DO NW=1,L_NSPECTI       
434        TAUCUMI(1,NW,NG)=0.0D0
435        DO K=2,L_LEVELS
436           TAUCUMI(K,NW,NG)=TAUCUMI(K-1,NW,NG)+DTAUKI(K,NW,NG)
437        END DO
438     END DO                 ! end full gauss loop
439  END DO
440
441  ! be aware when comparing with textbook results
442  ! (e.g. Pierrehumbert p. 218) that
443  ! taucumi does not take the <cos theta>=0.5 factor into
444  ! account. It is the optical depth for a vertically
445  ! ascending ray with angle theta = 0.
446
447  !open(127,file='taucum.out')
448  !do nw=1,L_NSPECTI
449  !   write(127,*) taucumi(L_LEVELS,nw,L_NGAUSS)
450  !enddo
451  !close(127)
452 
453!  print*,'WBARI'
454!  print*,WBARI
455!  print*,'DTAUI'
456!  print*,DTAUI
457!  call abort
458
459end subroutine optci
460
461END MODULE optci_mod
462
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