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guez |
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program test_ozonecm |
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! This is a program in Fortran 95. |
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! This program computes values of ozone abundance from Royer, on a |
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! latitude-pressure grid, and writes the values to a NetCDF file. |
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! The pressure grid is "presnivs" from "disvert". |
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use dimens_m, only: jjm, llm |
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USE dimphy, ONLY : klon |
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use disvert_m, only: pa, disvert, ap, bp, preff, presnivs |
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use jumble, only: new_unit |
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use ozonecm_m, only: ozonecm |
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use phyetat0_m, only: rlat |
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use nr_util, only: arth, assert |
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use netcdf95, only: nf95_create, nf95_def_dim, nf95_def_var, nf95_put_att, & |
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nf95_enddef, nf95_put_var, nf95_close |
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use netcdf, only: nf90_clobber, nf90_float, nf90_global |
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use unit_nml_m, only: unit_nml |
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implicit none |
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real p(llm + 1) ! pressure at LMDZ layer interface, in Pa |
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real wo(klon, llm, 360) ! column density of ozone in a cell, in kDU |
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real tro3(klon, llm, 360) ! mole fraction of ozone |
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integer julien, k |
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real, parameter:: RG = 9.80665 ! acceleration of gravity, in m s-2 |
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real, parameter:: dobson_u = 2.1415e-05 ! Dobson unit, in kg m-2 |
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! For NetCDF: |
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integer ncid, dimid_time, dimid_plev, dimid_latitude |
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integer varid_time, varid_plev, varid_latitude, varid_tro3 |
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!--------------------- |
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call assert(klon == jjm + 1, "test_ozonecm: iim should be 1") |
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call new_unit(unit_nml) |
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open(unit_nml, file="used_namelists.txt", status="replace", action="write") |
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pa = 5e4 |
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call disvert |
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p = ap + bp * preff |
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rlat = arth(-90., 180. / jjm, jjm + 1) |
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do julien = 1, 360 |
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wo(:, :, julien) = ozonecm(REAL(julien), spread(p, dim=1, ncopies=jjm+1)) |
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end do |
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close(unit_nml) |
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forall (k=1: llm) |
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tro3(:, k, :) & |
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= wo(:, k, :) * 1e3 * dobson_u / (p(k)-p(k+1)) * rg / 48. * 29. |
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end forall |
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call nf95_create("O3_Royer.nc", nf90_clobber, ncid) |
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call nf95_def_dim(ncid, "time", 360, dimid_time) |
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call nf95_def_dim(ncid, "plev", llm, dimid_plev) |
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call nf95_def_dim(ncid, "latitude", jjm + 1, dimid_latitude) |
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call nf95_def_var(ncid, "time", nf90_float, dimid_time, varid_time) |
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call nf95_def_var(ncid, "plev", nf90_float, dimid_plev, varid_plev) |
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call nf95_def_var(ncid, "latitude", nf90_float, dimid_latitude, & |
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varid_latitude) |
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call nf95_def_var(ncid, "tro3", nf90_float, & |
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(/dimid_latitude, dimid_plev, dimid_time/), varid_tro3) |
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call nf95_put_att(ncid, varid_time, "units", "days since 1976-1-1") |
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call nf95_put_att(ncid, varid_time, "calendar", "360_day") |
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call nf95_put_att(ncid, varid_time, "standard_name", "time") |
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call nf95_put_att(ncid, varid_plev, "units", "mbar") |
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call nf95_put_att(ncid, varid_plev, "long_name", "pressure") |
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call nf95_put_att(ncid, varid_plev, "standard_name", "air_pressure") |
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call nf95_put_att(ncid, varid_latitude, "units", "degrees_north") |
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call nf95_put_att(ncid, varid_latitude, "standard_name", "latitude") |
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call nf95_put_att(ncid, varid_tro3, "long_name", "O3 mole fraction") |
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call nf95_put_att(ncid, varid_tro3, "standard_name", & |
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"mole_fraction_of_ozone_in_air") |
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call nf95_put_att(ncid, nf90_global, "title", & |
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"ozone climatology from J.-F. Royer") |
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call nf95_enddef(ncid) |
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call nf95_put_var(ncid, varid_time, (/(julien - 0.5, julien = 1, 360)/)) |
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call nf95_put_var(ncid, varid_plev, presnivs(llm:1:-1) / 100.) |
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! sort in ascending order and convert to hPa |
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call nf95_put_var(ncid, varid_latitude, rlat) |
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call nf95_put_var(ncid, varid_tro3, tro3(:, llm:1:-1, :)) |
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! "plev" is in ascending order whereas "p" is descending |
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call nf95_close(ncid) |
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print *, 'The file "O3_Royer.nc" has been created.' |
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end program test_ozonecm |
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