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module ozonecm_m |
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IMPLICIT NONE |
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contains |
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function ozonecm(rjour, paprs) |
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! From phylmd/ozonecm.F, version 1.3 2005/06/06 13:16:33 |
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! The ozone climatology is based on an analytic formula which fits the |
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! Krueger and Mintzner (1976) profile, as well as the variations with |
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! altitude and latitude of the maximum ozone concentrations and the total |
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! column ozone concentration of Keating and Young (1986). The analytic |
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! formula have been established by J.-F. Royer (CRNM, Meteo France), who |
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! also provided us the code. |
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! A. J. Krueger and R. A. Minzner, A Mid-Latitude Ozone Model for the |
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! 1976 U.S. Standard Atmosphere, J. Geophys. Res., 81, 4477, (1976). |
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! Keating, G. M. and D. F. Young, 1985: Interim reference models for the |
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! middle atmosphere, Handbook for MAP, vol. 16, 205-229. |
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use dimens_m, only: llm |
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USE dimphy, ONLY : klon |
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use nr_util, only: assert, pi |
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use phyetat0_m, only: rlat |
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REAL, INTENT (IN) :: rjour |
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REAL, INTENT (IN) :: paprs(:, :) ! (klon, llm+1) |
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REAL ozonecm(klon, llm) |
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! "ozonecm(j, k)" is the column-density of ozone in cell "(j, k)", that is |
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! between interface "k" and interface "k + 1", in kDU. |
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! Variables local to the procedure: |
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REAL tozon, pl |
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INTEGER i, k |
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REAL field(klon, llm+1) |
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! "field(:, k)" is the column-density of ozone between interface |
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! "k" and the top of the atmosphere (interface "llm + 1"), in kDU. |
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real, PARAMETER:: ps=101325. |
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REAL, parameter:: an = 360., unit = 2.1415E-5, zo3q3 = 4E-8 |
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REAL gms, zslat, zsint, zcost, z, ppm, qpm, a |
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REAL asec, bsec, aprim, zo3a3 |
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!---------------------------------------------------------- |
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call assert(shape(paprs) == (/klon, llm + 1/), "ozonecm") |
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DO k = 1, llm |
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DO i = 1, klon |
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zslat = sin(pi / 180. * rlat(i)) |
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zsint = sin(2.*pi*(rjour+15.)/an) |
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zcost = cos(2.*pi*(rjour+15.)/an) |
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z = 0.0531 + zsint * (-0.001595+0.009443*zslat) & |
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+ zcost * (-0.001344-0.00346*zslat) & |
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+ zslat**2 * (.056222 + zslat**2 & |
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* (-.037609+.012248*zsint+.00521*zcost+.008890*zslat)) |
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zo3a3 = zo3q3/ps/2. |
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z = z - zo3q3*ps |
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gms = z |
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ppm = 800. - (500.*zslat+150.*zcost)*zslat |
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qpm = 1.74E-5 - (7.5E-6*zslat+1.7E-6*zcost)*zslat |
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bsec = 2650. + 5000.*zslat**2 |
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a = 4.0*(bsec)**(3./2.)*(ppm)**(3./2.)*(1.0+(bsec/ps)**(3./2.)) |
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a = a/(bsec**(3./2.)+ppm**(3./2.))**2 |
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aprim = (2.666666*qpm*ppm-a*gms)/(1.0-a) |
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aprim = amax1(0., aprim) |
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asec = (gms-aprim)*(1.0+(bsec/ps)**(3./2.)) |
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asec = amax1(0.0, asec) |
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aprim = gms - asec/(1.+(bsec/ps)**(3./2.)) |
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pl = paprs(i, k) |
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tozon = aprim / (1. + 3. * (ppm / pl)**2) & |
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+ asec / (1. + (bsec / pl)**(3./2.)) + zo3a3 * pl * pl |
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! Convert from Pa to kDU: |
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field(i, k) = tozon / 9.81 / unit / 1e3 |
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END DO |
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END DO |
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field(:, llm+1) = 0. |
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forall (k = 1: llm) ozonecm(:, k) = field(:, k) - field(:, k+1) |
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END function ozonecm |
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end module ozonecm_m |
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