source: trunk/LMDZ.MARS/libf/phymars/read_dust_scenario.F90 @ 1861

Last change on this file since 1861 was 1861, checked in by emillour, 7 years ago

Mars GCM:
Add possibility to load a dust MY33 scenario.
EM
File size: 10.3 KB
Line 
1subroutine read_dust_scenario(ngrid,nlayer,zday,pplev,tauref)
2
3! Reading of the dust scenario file
4
5use netcdf
6use geometry_mod, only: latitude, longitude ! in radians
7implicit none
8
9include "datafile.h"
10include "callkeys.h"
11
12integer, intent(in) :: ngrid,nlayer
13real, intent(in) :: zday ! date in martian days
14real, dimension(ngrid,nlayer+1), intent(in) :: pplev
15real, dimension(ngrid), intent(out) :: tauref
16
17! Local variables
18
19real :: realday
20integer nid,nvarid,ierr
21integer ltloop,lsloop,iloop,jloop,varloop,ig
22real, dimension(2) :: taubuf
23real tau1(4),tau
24real alt(4)
25integer latp(4),lonp(4)
26integer yinf,ysup,xinf,xsup,tinf,tsup
27real latinf,latsup,loninf,lonsup
28real latintmp,lonintmp,latdeg,londeg
29real colat,dlat,dlon,colattmp
30logical, save :: firstcall=.true.
31logical :: timeflag
32real,save :: radeg,pi
33integer :: timedim,londim,latdim
34real, dimension(:), allocatable, save :: lat,lon,time
35real, dimension(:,:,:), allocatable, save :: tautes
36integer, save :: timelen,lonlen,latlen
37character(len=33),save :: filename
38
39realday=mod(zday,669.)
40
41! AS: firstcall OK absolute
42if (firstcall) then
43   firstcall=.false.
44
45   pi=acos(-1.)
46   radeg=180/pi
47   
48   ! assimilated dust file: (NB: iaervar is a common in "callkeys.h")
49   ! iaervar=4 means read dust_tes.nc file
50   ! iaervar=6 means read dust_cold.nc file
51   ! iaervar=7 means read dust_warm.nc file
52   ! iaervar=8 means read dust_clim.nc file
53   ! iaervar=24 means read dust_MY24.nc file
54   ! iaervar=25 means read dust_MY25.nc file
55   ! iaervar=26 means read dust_MY26.nc file, etc.
56   if (iaervar.eq.4) then
57   ! NB: 4: old TES assimilated MY24 dust scenarios (at 700Pa ref pressure!)
58     filename="dust_tes.nc"
59   else if (iaervar.eq.6) then
60     filename="dust_cold.nc"
61   else if (iaervar.eq.7) then
62     filename="dust_warm.nc"
63   else if (iaervar.eq.8) then
64     filename="dust_clim.nc"
65   else if (iaervar.eq.24) then
66     filename="dust_MY24.nc"
67   else if (iaervar.eq.25) then
68     filename="dust_MY25.nc"
69   else if (iaervar.eq.26) then
70     filename="dust_MY26.nc"
71   else if (iaervar.eq.27) then
72     filename="dust_MY27.nc"
73   else if (iaervar.eq.28) then
74     filename="dust_MY28.nc"
75   else if (iaervar.eq.29) then
76     filename="dust_MY29.nc"   
77   else if (iaervar.eq.30) then
78     filename="dust_MY30.nc"   
79   else if (iaervar.eq.31) then
80     filename="dust_MY31.nc"
81   else if (iaervar.eq.32) then
82     filename="dust_MY32.nc"
83   else if (iaervar.eq.33) then
84     filename="dust_MY33.nc"
85   ! 124,125,126: old TES assimilated dust scenarios (at 700Pa ref pressure!)
86   else if  (iaervar.eq.124) then
87     filename="dust_tes_MY24.nc"
88   else if (iaervar.eq.125) then
89     filename="dust_tes_MY25.nc"
90   else if (iaervar.eq.126) then
91     filename="dust_tes_MY26.nc"
92   endif
93   
94   ! Note: datafile() is defined in "datafile.h"
95   !ierr=NF_OPEN(trim(datafile)//"/"//trim(filename),NF_NOWRITE,nid)
96   ierr=nf90_open(trim(datafile)//"/"//trim(filename),NF90_NOWRITE,nid)
97   IF (ierr.NE.nf90_noerr) THEN
98     write(*,*)'Problem opening ',trim(filename),' (in phymars/read_dust_scenario.F90)'
99     write(*,*)'It should be in :',trim(datafile),'/'
100     write(*,*)'1) You can change this directory address in callfis.def with'
101     write(*,*)'   datadir=/path/to/datafiles'
102     write(*,*)'2) If necessary, dust*.nc (and other datafiles)'
103     write(*,*)'   can be obtained online on:'
104     write(*,*)'   http://www.lmd.jussieu.fr/~lmdz/planets/mars/datadir'
105     CALL ABORT
106   ENDIF
107
108   ierr=nf90_inq_dimid(nid,"Time",timedim)
109   if (ierr.ne.nf90_noerr) then
110    ! 'Time' dimension not found, look for 'time'
111    ierr=nf90_inq_dimid(nid,"time",timedim)
112    if (ierr.ne.nf90_noerr) then
113      write(*,*)"Error: read_dust_scenario <time> not found"
114    endif
115   endif
116   ierr=nf90_inquire_dimension(nid,timedim,len=timelen)
117   ierr=nf90_inq_dimid(nid,"latitude",latdim)
118   ierr=nf90_inquire_dimension(nid,latdim,len=latlen)
119   ierr=nf90_inq_dimid(nid,"longitude",londim)
120   ierr=nf90_inquire_dimension(nid,londim,len=lonlen)
121
122
123   if (.not.allocated(tautes)) allocate(tautes(lonlen,latlen,timelen))
124   if (.not.allocated(lat)) allocate(lat(latlen), lon(lonlen), time(timelen))
125
126   ! "dustop" if loading visible extinction opacity
127   ! "cdod" if loading IR absorption opacity
128   ierr=nf90_inq_varid(nid,"dustop",nvarid)
129   if (ierr.eq.nf90_noerr) then
130     ierr=nf90_get_var(nid,nvarid,tautes)
131     IF (ierr .NE. nf90_noerr) THEN
132        PRINT*, "Error: read_dust_scenario <dustop> not found"
133        write(*,*)trim(nf90_strerror(ierr))
134        stop
135     ENDIF
136   else
137     ! did not find "dustop" , look for "cdod"
138     ierr=nf90_inq_varid(nid,"cdod",nvarid)
139     ierr=nf90_get_var(nid,nvarid,tautes)
140     IF (ierr .NE. nf90_noerr) THEN
141        PRINT*, "Error: read_dust_scenario <cdod> not found"
142        write(*,*)trim(nf90_strerror(ierr))
143        stop
144     ENDIF
145     ! and multiply by 2*1.3=2.6 to convert from IR absorption
146     ! to visible extinction opacity
147     tautes(:,:,:)=2.6*tautes(:,:,:)
148   endif
149
150   ierr=nf90_inq_varid(nid,"Time",nvarid)
151   ierr=nf90_get_var(nid,nvarid,time)
152   IF (ierr .NE. nf90_noerr) THEN
153      PRINT*, "Error: read_dust_scenario <Time> not found"
154      write(*,*)trim(nf90_strerror(ierr))
155      stop
156   ENDIF
157
158   ierr=nf90_inq_varid(nid,"latitude",nvarid)
159   ierr=nf90_get_var(nid,nvarid,lat)
160   IF (ierr .NE. nf90_noerr) THEN
161      PRINT*, "Error: read_dust_scenario <latitude> not found"
162      write(*,*)trim(nf90_strerror(ierr))
163      stop
164   ENDIF
165
166   ierr=nf90_inq_varid(nid,"longitude",nvarid)
167   ierr=nf90_get_var(nid,nvarid,lon)
168   IF (ierr .NE. nf90_noerr) THEN
169      PRINT*, "Error: read_dust_scenario <longitude> not found"
170      write(*,*)trim(nf90_strerror(ierr))
171      stop
172   ENDIF
173
174   ierr=nf90_close(nid)
175
176endif ! of if (firstcall)
177
178do ig=1,ngrid
179
180! Find the four nearest points, arranged as follows:
181!                               1 2
182!                               3 4
183
184   latdeg=latitude(ig)*radeg  ! latitude, in degrees
185   londeg=longitude(ig)*radeg  ! longitude, in degrees east
186   colat=90-latdeg        ! colatitude, in degrees
187
188! Ehouarn: rounding effects and/or specific compiler issues
189!          sometime cause londeg to be sligthly below -180 ...
190  if (londeg.lt.-180) then
191    ! check if it is by a large amount
192    if ((londeg+180).lt.-1.e-3) then
193      write(*,*) 'reattesassim: error!!'
194      write(*,*) ' ig=',ig,' londeg=',londeg
195      stop
196    else
197      londeg=-180
198    endif
199  endif
200
201 ! Find encompassing latitudes
202   if (colat<(90-lat(1))) then ! between north pole and lat(1)
203      ysup=1
204      yinf=1
205   else if (colat>=90-(lat(latlen))) then ! between south pole and lat(laten)
206      ysup=latlen
207      yinf=latlen
208   else ! general case
209      do iloop=2,latlen
210         if(colat<(90-lat(iloop))) then
211           ysup=iloop-1
212           yinf=iloop
213           exit
214         endif
215      enddo
216   endif
217
218   latinf=lat(yinf)
219   latsup=lat(ysup)
220
221
222 ! Find encompassing longitudes
223   ! Note: in input file, lon(1)=-180.
224   if (londeg>lon(lonlen)) then
225      xsup=1
226      xinf=lonlen
227      loninf=lon(xsup)
228      lonsup=180.0 ! since lon(1)=-180.0
229   else
230      do iloop=2,lonlen
231         if(londeg<lon(iloop)) then
232              xsup=iloop
233              xinf=iloop-1
234              exit
235         endif
236      enddo
237      loninf=lon(xinf)
238      lonsup=lon(xsup)
239   endif
240
241   if ((xsup.gt.lonlen).OR.(yinf.gt.latlen).OR.(xinf.lt.1)&
242     .OR.(ysup.lt.1)) then
243      write (*,*) "read_dust_scenario: SYSTEM ERROR on x or y in ts_gcm"
244      write (*,*) "xinf: ",xinf
245      write (*,*) "xsup: ",xsup
246      write (*,*) "yinf: ",yinf
247      write (*,*) "ysup: ",ysup
248      stop
249   endif
250
251!   loninf=lon(xinf)
252!   lonsup=lon(xsup)
253!   latinf=lat(yinf)
254!   latsup=lat(ysup)
255
256! The four neighbouring points are arranged as follows:
257!                               1 2
258!                               3 4
259
260   latp(1)=ysup
261   latp(2)=ysup
262   latp(3)=yinf
263   latp(4)=yinf
264
265   lonp(1)=xinf
266   lonp(2)=xsup
267   lonp(3)=xinf
268   lonp(4)=xsup
269
270! Linear interpolation on time, for all four neighbouring points
271
272   if ((realday<time(1)).or.(realday>time(timelen))) then
273      tinf=timelen
274      tsup=1
275      timeflag=.true.
276   else
277      timeflag=.false.
278      do iloop=2,timelen
279         if (realday<=time(iloop)) then
280            tinf=iloop-1
281            tsup=iloop
282            exit
283         endif
284      enddo
285   endif
286
287! Bilinear interpolation on the four nearest points
288
289   if ((colat<(90-lat(1))).OR.(colat>(90-lat(latlen))).OR.(latsup==latinf)) then
290      dlat=0
291   else
292      dlat=((90-latinf)-colat)/((90-latinf)-(90-latsup))
293   endif
294
295   if (lonsup==loninf) then
296      dlon=0
297   else
298      dlon=(londeg-loninf)/(lonsup-loninf)
299   endif
300
301   do iloop=1,4
302      taubuf(1)=tautes(lonp(iloop),latp(iloop),tinf)
303      taubuf(2)=tautes(lonp(iloop),latp(iloop),tsup)
304      if (timeflag) then
305         if (realday>time(timelen)) then
306            tau1(iloop)=taubuf(1)+(taubuf(2)-taubuf(1))*(realday-time(tinf))/(time(tsup)+(669-time(tinf)))
307         else
308            tau1(iloop)=taubuf(1)+(taubuf(2)-taubuf(1))*realday/(time(tsup)+(669-time(tinf)))
309         endif
310      else
311         tau1(iloop)=taubuf(1)+(taubuf(2)-taubuf(1))*(realday-time(tinf))/(time(tsup)-time(tinf))
312      endif
313      if (tau1(iloop)<0) then
314          write (*,*) "read_dust_scenario: SYSTEM ERROR on tau"
315          write (*,*) "utime ",realday
316          write (*,*) "time(tinf) ",time(tinf)
317          write (*,*) "time(tsup) ",time(tsup)
318          write (*,*) "tau1 ",taubuf(1)
319          write (*,*) "tau2 ",taubuf(2)
320          write (*,*) "tau ",tau1(iloop)
321          stop
322      endif
323   enddo
324
325   if ((dlat>1).OR.(dlon>1) .OR. (dlat<0) .OR. (dlon<0)) then
326      write (*,*) "read_dust_scenario: SYSTEM ERROR on dlat or dlon in ts_gcm"
327      write (*,*) "dlat: ",dlat
328      write (*,*) "lat: ",latdeg
329      write (*,*) "dlon: ",dlon
330      write (*,*) "lon: ",londeg
331      stop
332   endif
333
334   tau= dlat*(dlon*(tau1(2)+tau1(3)-tau1(1)-tau1(4))+tau1(1)-tau1(3)) +dlon*(tau1(4)-tau1(3))+tau1(3)
335
336   tauref(ig)=tau
337!
338enddo ! of ig=1,ngrid
339
340if (filename(1:8)=="dust_tes") then
341  ! when using old TES files, correction for:
342  ! - the reference pressure was 700Pa (unlike 610Pa now)
343  ! - the 1.3 conversion factor from IR absorbtion opacity to
344  !   IR extinction opacity
345  tauref(:)=tauref(:)*1.3*(610./700.)
346endif
347
348if (swrtype.eq.1) then ! Fouquart (NB: swrtype is set in callkeys.h)
349 ! when using old radiative transfer (like in MCD 4.x)
350 ! needed to decrease opacity (*0.825) to compensate overestimation of
351 ! heating rates
352  tauref(:)=tauref(:)*0.825/1.3
353endif
354
355end
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