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module readsulfate_preind_m |
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|
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IMPLICIT none |
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|
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contains |
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|
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SUBROUTINE readsulfate_preind(dayvrai, time, first, sulfate) |
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|
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! Read and calculate pre-industrial values of sulfate. This |
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! routine reads monthly mean values of sulfate aerosols and |
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! returns a linearly interpolated daily-mean field. It does so for |
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! 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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! Author: |
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! Johannes Quaas (quaas@lmd.jussieu.fr) |
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! June 26th, 2001 |
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|
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use dimens_m, only: iim, jjm |
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use dimphy, only: klon, klev |
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use dynetat0_m, only: annee_ref |
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use getso4fromfile_m, only: getso4fromfile |
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|
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integer, intent(in):: dayvrai |
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! current day number, based at value 1 on January 1st of annee_ref |
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|
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REAL, intent(in):: time ! heure de la journ\'ee en fraction de jour |
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|
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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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real, intent(out):: sulfate (klon, klev) |
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! number concentration sulfate (monthly mean data, from file) |
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|
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! Local: |
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INTEGER i, ig, k, it |
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INTEGER j, iday, iyr |
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INTEGER im, day1, day2, im2 |
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real so4_1(iim, jjm + 1, klev, 12) |
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double precision, save:: so4(klon, klev, 12) ! SO4 in right dimension |
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double precision, save:: so4_out(klon, klev) |
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LOGICAL lnewday |
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|
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!---------------------------------------------------------------- |
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|
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iday = dayvrai |
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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 = time < 0.02 |
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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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test_newday: 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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IF (first) THEN |
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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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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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CALL getso4fromfile('.nat', 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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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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so4(1, k, it) = so4(1, k, it) & |
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+ so4_1(i, jjm + 1, klev + 1 - k, it) |
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! South pole |
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so4(klon, k, it) = so4(klon, k, it) & |
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+ so4_1(i, 1, klev + 1 - k, it) |
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ENDDO |
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so4(1, k, it) = so4(1, k, it)/REAL(iim) |
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so4(klon, k, it) = so4(klon, k, it)/REAL(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 > klon) stop 1 |
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so4(ig, k, it) = 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 /= klon - 1) then |
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print *, 'Error in readsulfate (var conversion)' |
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STOP 1 |
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end IF |
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ENDDO ! Loop over k (vertical) |
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ENDDO ! Loop over it (months) |
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ENDIF ! Had to read new data? |
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|
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! Interpolate to actual day: |
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IF (iday < 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 <= 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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sulfate(i, k) = so4(i, k, im2) & |
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- REAL(iday - day2)/REAL(day1 - day2) & |
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* (so4(i, k, im2) - so4(i, k, im)) |
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IF (sulfate(i, k) < 0.) THEN |
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IF (iday - day2 < 0.) write(*, *) 'iday - day2', iday - day2 |
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IF (so4(i, k, im2) - so4(i, k, im) < 0.) & |
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write(*, *) 'so4(i, k, im2) - so4(i, k, im)', & |
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so4(i, k, im2) - so4(i, k, im) |
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IF (day1 - day2 < 0.) write(*, *) 'day1 - day2', day1 - day2 |
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stop 1 |
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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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IF (im2 > 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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day1 = im*30 + 15 |
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DO k = 1, klev |
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DO i = 1, klon |
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sulfate(i, k) = so4(i, k, im2) & |
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- REAL(iday - day2)/REAL(day1 - day2) & |
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* (so4(i, k, im2) - so4(i, k, im)) |
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IF (sulfate(i, k) < 0.) THEN |
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IF (iday - day2 < 0.) write(*, *) 'iday - day2', iday - day2 |
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IF (so4(i, k, im2) - so4(i, k, im) < 0.) & |
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write(*, *) 'so4(i, k, im2) - so4(i, k, im)', & |
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so4(i, k, im2) - so4(i, k, im) |
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IF (day1 - day2 < 0.) write(*, *) 'day1 - day2', day1 - day2 |
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stop 1 |
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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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DO k = 1, klev |
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DO i = 1, klon |
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so4_out(i, k) = sulfate(i, k) |
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ENDDO |
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ENDDO |
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ELSE |
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! 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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sulfate(i, k) = so4_out(i, k) |
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ENDDO |
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ENDDO |
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ENDIF test_newday |
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|
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END SUBROUTINE readsulfate_preind |
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|
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end module readsulfate_preind_m |