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SUBROUTINE readsulfate_preind (r_day, first, pi_sulfate) |
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|
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! Read in /calculate pre-industrial values of sulfate |
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|
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use dimens_m |
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use dimphy |
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use temps |
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use SUPHEC_M |
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use chem |
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use getso4fromfile_m, only: getso4fromfile |
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IMPLICIT none |
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|
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! Content: |
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! -------- |
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! This routine reads in monthly mean values of sulfate aerosols and |
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! returns a linearly interpolated daily-mean field. |
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! |
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! It does so for the preindustriel values of the sulfate, to a large part |
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! analogous to the routine readsulfate. |
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! |
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! Only Pb: Variables must be saved and don t have to be overwritten! |
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! |
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! Author: |
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! ------- |
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! Johannes Quaas (quaas@lmd.jussieu.fr) |
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! 26/06/01 |
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! |
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! Input: |
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! ------ |
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double precision, intent(in):: r_day ! Day of integration |
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LOGICAL, intent(in):: first ! First timestep |
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! (and therefore initialization necessary) |
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! |
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! Output: |
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! ------- |
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double precision pi_sulfate (klon, klev) ! Number conc. sulfate (monthly mean data, |
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! from file) |
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! |
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! Local Variables: |
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! ---------------- |
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INTEGER i, ig, k, it |
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INTEGER j, iday, ny, iyr |
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parameter (ny=jjm+1) |
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|
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INTEGER im, day1, day2, im2, ismaller |
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double precision pi_so4_1(iim, jjm+1, klev, 12) |
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|
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double precision pi_so4(klon, klev, 12) ! SO4 in right dimension |
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SAVE pi_so4 |
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double precision pi_so4_out(klon, klev) |
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SAVE pi_so4_out |
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|
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CHARACTER*4 cyear |
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LOGICAL lnewday |
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|
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|
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|
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iday = INT(r_day) |
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|
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! Get the year of the run |
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iyr = iday/360 |
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|
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! Get the day of the actual year: |
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iday = iday-iyr*360 |
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|
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! 0.02 is about 0.5/24, namly less than half an hour |
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lnewday = (r_day-FLOAT(iday).LT.0.02) |
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|
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! --------------------------------------------- |
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! All has to be done only, if a new day begins! |
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! --------------------------------------------- |
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|
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IF (lnewday.OR.first) THEN |
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im = iday/30 +1 ! the actual month |
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|
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! annee_ref is the initial year (defined in temps.h) |
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iyr = iyr + annee_ref |
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|
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|
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IF (first) THEN |
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cyear='.nat' |
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CALL getso4fromfile(cyear,pi_so4_1) |
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|
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! Transform the horizontal 2D-field into the physics-field |
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! (Also the levels and the latitudes have to be inversed) |
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|
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! Initialize field |
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DO it=1,12 |
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DO k=1,klev |
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DO i=1,klon |
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pi_so4(i,k,it)=0. |
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ENDDO |
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ENDDO |
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ENDDO |
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|
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write (*,*) 'preind: finished reading', FLOAT(iim) |
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DO it=1,12 |
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DO k=1, klev |
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! a) at the poles, use the zonal mean: |
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DO i=1,iim |
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! North pole |
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pi_so4(1,k,it)=pi_so4(1,k,it)+pi_so4_1(i,jjm+1,klev+1-k,it) |
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! South pole |
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pi_so4(klon,k,it)=pi_so4(klon,k,it)+pi_so4_1(i,1,klev+1-k,it) |
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ENDDO |
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pi_so4(1,k,it)=pi_so4(1,k,it)/FLOAT(iim) |
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pi_so4(klon,k,it)=pi_so4(klon,k,it)/FLOAT(iim) |
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|
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! b) the values between the poles: |
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ig=1 |
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DO j=2,jjm |
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DO i=1,iim |
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ig=ig+1 |
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if (ig.gt.klon) write (*,*) 'shit' |
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pi_so4(ig,k,it) = pi_so4_1(i,jjm+1-j,klev+1-k,it) |
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ENDDO |
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ENDDO |
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IF (ig.NE.klon-1) STOP 'Error in readsulfate (var conversion)' |
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ENDDO ! Loop over k (vertical) |
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ENDDO ! Loop over it (months) |
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|
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ENDIF ! Had to read new data? |
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|
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|
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! Interpolate to actual day: |
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IF (iday.LT.im*30-15) THEN |
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! in the first half of the month use month before and actual month |
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im2=im-1 |
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day1 = im2*30+15 |
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day2 = im2*30-15 |
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IF (im2.LE.0) THEN |
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! the month is january, thus the month before december |
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im2=12 |
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ENDIF |
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DO k=1,klev |
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DO i=1,klon |
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pi_sulfate(i,k) = pi_so4(i,k,im2) & |
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- FLOAT(iday-day2)/FLOAT(day1-day2) & |
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* (pi_so4(i,k,im2) - pi_so4(i,k,im)) |
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IF (pi_sulfate(i,k).LT.0.) THEN |
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IF (iday-day2.LT.0.) write(*,*) 'iday-day2',iday-day2 |
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IF (pi_so4(i,k,im2) - pi_so4(i,k,im).LT.0.) & |
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write(*,*) 'pi_so4(i,k,im2) - pi_so4(i,k,im)', & |
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pi_so4(i,k,im2) - pi_so4(i,k,im) |
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IF (day1-day2.LT.0.) write(*,*) 'day1-day2',day1-day2 |
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stop 'pi_sulfate' |
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endif |
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ENDDO |
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ENDDO |
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ELSE |
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! the second half of the month |
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im2=im+1 |
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day1 = im*30+15 |
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IF (im2.GT.12) THEN |
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! the month is december, the following thus january |
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im2=1 |
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ENDIF |
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day2 = im*30-15 |
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|
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DO k=1,klev |
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DO i=1,klon |
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pi_sulfate(i,k) = pi_so4(i,k,im2) & |
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- FLOAT(iday-day2)/FLOAT(day1-day2) & |
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* (pi_so4(i,k,im2) - pi_so4(i,k,im)) |
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IF (pi_sulfate(i,k).LT.0.) THEN |
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IF (iday-day2.LT.0.) write(*,*) 'iday-day2',iday-day2 |
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IF (pi_so4(i,k,im2) - pi_so4(i,k,im).LT.0.) & |
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write(*,*) 'pi_so4(i,k,im2) - pi_so4(i,k,im)', & |
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pi_so4(i,k,im2) - pi_so4(i,k,im) |
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IF (day1-day2.LT.0.) write(*,*) 'day1-day2',day1-day2 |
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stop 'pi_sulfate' |
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endif |
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ENDDO |
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ENDDO |
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ENDIF |
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|
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|
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!JLD ! The sulfate concentration [molec cm-3] is read in. |
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!JLD ! Convert it into mass [ug SO4/m3] |
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!JLD ! masse_so4 in [g/mol], n_avogadro in [molec/mol] |
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DO k=1,klev |
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DO i=1,klon |
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!JLD pi_sulfate(i,k) = pi_sulfate(i,k)*masse_so4 |
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!JLD . /n_avogadro*1.e+12 |
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pi_so4_out(i,k) = pi_sulfate(i,k) |
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ENDDO |
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ENDDO |
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|
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ELSE ! If no new day, use old data: |
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DO k=1,klev |
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DO i=1,klon |
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pi_sulfate(i,k) = pi_so4_out(i,k) |
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ENDDO |
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ENDDO |
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ENDIF ! Was this the beginning of a new day? |
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|
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END SUBROUTINE readsulfate_preind |
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