7 |
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8 |
implicit none |
implicit none |
9 |
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10 |
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! The five module variables declared here are on the "physics" grid. |
11 |
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! The value of each variable for index "(i, k)" is at longitude |
12 |
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! "rlon(i)", latitude "rlat(i)" and middle of layer "k". |
13 |
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14 |
real, save:: c_Mob(klon, llm) |
real, save:: c_Mob(klon, llm) |
15 |
! (sum of Mobidic terms in the net mass production rate of ozone |
! (sum of Mobidic terms in the net mass production rate of ozone |
16 |
! by chemistry, per unit mass of air, in s-1) |
! by chemistry, per unit mass of air, in s-1) |
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! (On the "physics" grid. |
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! "c_Mob(i, k)" is at longitude "rlon(i)", latitude "rlat(i)", |
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! middle of layer "k".) |
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17 |
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18 |
real, save:: a2(klon, llm) |
real, save:: a2(klon, llm) |
19 |
! (derivative of mass production rate of ozone per unit mass of |
! (derivative of mass production rate of ozone per unit mass of |
20 |
! air with respect to ozone mass fraction, in s-1) |
! air with respect to ozone mass fraction, in s-1) |
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! (On the "physics" grid. |
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! "a2(i, k)" is at longitude "rlon(i)", latitude "rlat(i)", |
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! middle of layer "k".) |
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21 |
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22 |
real, save:: a4_mass(klon, llm) |
real, save:: a4_mass(klon, llm) |
23 |
! (derivative of mass production rate of ozone per unit mass of |
! (derivative of mass production rate of ozone per unit mass of |
24 |
! air with respect to temperature, in s-1 K-1) |
! air with respect to temperature, in s-1 K-1) |
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! (On the "physics" grid. |
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! "a4_mass(i, k)" is at longitude "rlon(i)", latitude "rlat(i)", |
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! middle of layer "k".) |
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25 |
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26 |
real, save:: a6_mass(klon, llm) |
real, save:: a6_mass(klon, llm) |
27 |
! (derivative of mass production rate of ozone per unit mass of |
! (derivative of mass production rate of ozone per unit mass of |
28 |
! air with respect to mass column-density of ozone above, in m2 s-1 kg-1) |
! air with respect to mass column-density of ozone above, in m2 s-1 kg-1) |
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! (On the "physics" grid. |
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! "a6_mass(i, k)" is at longitude "rlon(i)", latitude "rlat(i)", |
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! middle of layer "k".) |
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29 |
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30 |
real, save:: r_het_interm(klon, llm) |
real, save:: r_het_interm(klon, llm) |
31 |
! (net mass production rate by heterogeneous chemistry, per unit |
! (net mass production rate by heterogeneous chemistry, per unit |
32 |
! mass of ozone, corrected for chlorine content and latitude, but |
! mass of ozone, corrected for chlorine content and latitude, but |
33 |
! not for temperature and sun direction, in s-1) |
! not for temperature and sun direction, in s-1) |
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! (On the "physics" grid. |
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! "r_het_interm(i, k)" is at longitude "rlon(i)", latitude "rlat(i)", |
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! middle of layer "k".) |
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34 |
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35 |
private klon, llm |
private klon, llm |
36 |
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42 |
! coefficients ozone". |
! coefficients ozone". |
43 |
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44 |
! This subroutine : |
! This subroutine : |
45 |
! -- reads from a file all eight parameters for ozone chemistry, |
! -- reads from a file all eight coefficients for ozone chemistry, |
46 |
! at the current day ; |
! at the current day ; |
47 |
! -- regrids the parameters in pressure to the LMDZ vertical grid ; |
! -- regrids the coefficients in pressure to the LMDZ vertical grid ; |
48 |
! -- packs the parameters to the "physics" horizontal grid ; |
! -- packs the coefficients to the "physics" horizontal grid ; |
49 |
! -- combines the eight parameters to define the five module variables. |
! -- combines the eight coefficients to define the five module variables. |
50 |
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51 |
! We assume that, in "coefoz_LMDZ.nc", the pressure levels are in hPa |
! We assume that, in "coefoz_LMDZ.nc", the pressure levels are in hPa |
52 |
! and strictly increasing. |
! and strictly increasing. |
61 |
! Variables local to the procedure: |
! Variables local to the procedure: |
62 |
integer ncid ! for NetCDF |
integer ncid ! for NetCDF |
63 |
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real, pointer:: plev(:) |
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! (pressure level of input data, converted to Pa, in strictly |
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! increasing order) |
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integer n_plev ! number of pressure levels in the input data |
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real, allocatable:: press_in_edg(:) |
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! (edges of pressure intervals for input data, in Pa, in strictly |
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! increasing order) |
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64 |
real coefoz(klon, llm) |
real coefoz(klon, llm) |
65 |
! (temporary storage for an ozone coefficient) |
! (temporary storage for an ozone coefficient) |
66 |
! (On the "physics" grid. |
! (On the "physics" grid. |
83 |
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84 |
!------------------------------------ |
!------------------------------------ |
85 |
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86 |
print *, "Call sequence information: read_coefoz" |
print *, "Call sequence information: regr_pr_comb_coefoz" |
87 |
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88 |
call nf95_open("coefoz_LMDZ.nc", nf90_nowrite, ncid) |
call nf95_open("coefoz_LMDZ.nc", nf90_nowrite, ncid) |
89 |
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90 |
call nf95_get_coord(ncid, "plev", plev) |
call regr_pr_av_coefoz(ncid, "a2", julien, a2) |
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! Convert from hPa to Pa because "regr_pr_av" and "regr_pr_int" require so: |
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plev = plev * 100. |
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n_plev = size(plev) |
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! Compute edges of pressure intervals: |
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allocate(press_in_edg(n_plev + 1)) |
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press_in_edg(1) = 0. |
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! We choose edges halfway in logarithm: |
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forall (k = 2:n_plev) press_in_edg(k) = sqrt(plev(k - 1) * plev(k)) |
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press_in_edg(n_plev + 1) = huge(0.) |
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! (infinity, but any value guaranteed to be greater than the |
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! surface pressure would do) |
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call regr_pr_av_coefoz(ncid, "a2", julien, press_in_edg, a2) |
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91 |
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92 |
call regr_pr_av_coefoz(ncid, "a4", julien, press_in_edg, a4_mass) |
call regr_pr_av_coefoz(ncid, "a4", julien, a4_mass) |
93 |
a4_mass = a4_mass * 48. / 29. |
a4_mass = a4_mass * 48. / 29. |
94 |
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95 |
call regr_pr_av_coefoz(ncid, "a6", julien, press_in_edg, a6) |
call regr_pr_av_coefoz(ncid, "a6", julien, a6) |
96 |
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97 |
! Compute "a6_mass" avoiding underflow, do not divide by 1e4 |
! Compute "a6_mass" avoiding underflow, do not divide by 1e4 |
98 |
! before dividing by molecular mass: |
! before dividing by molecular mass: |
103 |
! (We use as few local variables as possible, in order to spare |
! (We use as few local variables as possible, in order to spare |
104 |
! main memory.) |
! main memory.) |
105 |
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106 |
call regr_pr_av_coefoz(ncid, "P_net_Mob", julien, press_in_edg, c_Mob) |
call regr_pr_av_coefoz(ncid, "P_net_Mob", julien, c_Mob) |
107 |
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108 |
call regr_pr_av_coefoz(ncid, "r_Mob", julien, press_in_edg, coefoz) |
call regr_pr_av_coefoz(ncid, "r_Mob", julien, coefoz) |
109 |
c_mob = c_mob - a2 * coeofoz |
c_mob = c_mob - a2 * coefoz |
110 |
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111 |
call regr_pr_int_coefoz(ncid, "Sigma_Mob", julien, plev, top_value=0., & |
call regr_pr_int_coefoz(ncid, "Sigma_Mob", julien, top_value=0., v3=coefoz) |
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coefoz) |
|
112 |
c_mob = (c_mob - a6 * coefoz) * 48. / 29. |
c_mob = (c_mob - a6 * coefoz) * 48. / 29. |
113 |
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114 |
call regr_pr_av_coefoz(ncid, "temp_Mob", julien, press_in_edg, coefoz) |
call regr_pr_av_coefoz(ncid, "temp_Mob", julien, coefoz) |
115 |
c_mob = c_mob - a4_mass * coefoz |
c_mob = c_mob - a4_mass * coefoz |
116 |
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117 |
call regr_pr_av_coefoz(ncid, "R_Het", julien, press_in_edg, r_het_interm) |
call regr_pr_av_coefoz(ncid, "R_Het", julien, r_het_interm) |
118 |
! Heterogeneous chemistry is only at high latitudes: |
! Heterogeneous chemistry is only at high latitudes: |
119 |
forall (k = 1: llm) |
forall (k = 1: llm) |
120 |
where (abs(rlat) <= 45.) r_het_interm(:, k) = 0. |
where (abs(rlat) <= 45.) r_het_interm(:, k) = 0. |
121 |
end forall |
end forall |
122 |
where (r_het_interm /= 0.) r_het_interm = r_het_interm * (Clx / 3.8e-9)**2 |
r_het_interm = r_het_interm * (Clx / 3.8e-9)**2 |
123 |
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deallocate(plev) ! pointer |
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124 |
call nf95_close(ncid) |
call nf95_close(ncid) |
125 |
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126 |
end subroutine regr_pr_comb_coefoz |
end subroutine regr_pr_comb_coefoz |