/[lmdze]/trunk/libf/phylmd/Mobidic/regr_pr_comb_coefoz.f90
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trunk/libf/phylmd/read_coefoz_m.f90 revision 7 by guez, Mon Mar 31 12:24:17 2008 UTC trunk/libf/phylmd/Mobidic/regr_pr_comb_coefoz.f90 revision 52 by guez, Fri Sep 23 12:28:01 2011 UTC
# Line 1  Line 1 
1  module regr_pr_comb_coefoz_m  module regr_pr_comb_coefoz_m
2    
   ! This module is clean: no C preprocessor directive, no include line.  
   
3    use dimens_m, only: llm    use dimens_m, only: llm
4    use dimphy, only: klon    use dimphy, only: klon
5    
6    implicit none    implicit none
7    
8      ! The five module variables declared here are on the "physics" grid.
9      ! The value of each variable for index "(i, k)" is at longitude
10      ! "rlon(i)", latitude "rlat(i)" and middle of layer "k".
11    
12    real, save:: c_Mob(klon, llm)    real, save:: c_Mob(klon, llm)
13    ! (sum of Mobidic terms in the net mass production rate of ozone    ! (sum of Mobidic terms in the net mass production rate of ozone
14    ! by chemistry, per unit mass of air, in s-1)    ! by chemistry, per unit mass of air, in s-1)
   ! (On the "physics" grid.  
   ! "c_Mob(i, k)" is at longitude "rlon(i)", latitude "rlat(i)",  
   ! middle of layer "k".)  
15    
16    real, save:: a2(klon, llm)    real, save:: a2(klon, llm)
17    ! (derivative of mass production rate of ozone per unit mass of    ! (derivative of mass production rate of ozone per unit mass of
18    ! air with respect to ozone mass fraction, in s-1)    ! air with respect to ozone mass fraction, in s-1)
   ! (On the "physics" grid.  
   ! "a2(i, k)" is at longitude "rlon(i)", latitude "rlat(i)",  
   ! middle of layer "k".)  
19    
20    real, save:: a4_mass(klon, llm)    real, save:: a4_mass(klon, llm)
21    ! (derivative of mass production rate of ozone per unit mass of    ! (derivative of mass production rate of ozone per unit mass of
22    ! air with respect to temperature, in s-1 K-1)    ! air with respect to temperature, in s-1 K-1)
   ! (On the "physics" grid.  
   ! "a4_mass(i, k)" is at longitude "rlon(i)", latitude "rlat(i)",  
   ! middle of layer "k".)  
23    
24    real, save:: a6_mass(klon, llm)    real, save:: a6_mass(klon, llm)
25    ! (derivative of mass production rate of ozone per unit mass of    ! (derivative of mass production rate of ozone per unit mass of
26    ! 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)
   ! (On the "physics" grid.  
   ! "a6_mass(i, k)" is at longitude "rlon(i)", latitude "rlat(i)",  
   ! middle of layer "k".)  
27    
28    real, save:: r_het_interm(klon, llm)    real, save:: r_het_interm(klon, llm)
29    ! (net mass production rate by heterogeneous chemistry, per unit    ! (net mass production rate by heterogeneous chemistry, per unit
30    ! mass of ozone, corrected for chlorine content and latitude, but    ! mass of ozone, corrected for chlorine content and latitude, but
31    ! not for temperature and sun direction, in s-1)    ! not for temperature and sun direction, in s-1)
   ! (On the "physics" grid.  
   ! "r_het_interm(i, k)" is at longitude "rlon(i)", latitude "rlat(i)",  
   ! middle of layer "k".)  
32    
33    private klon, llm    private klon, llm
34    
# Line 53  contains Line 40  contains
40      ! coefficients ozone".      ! coefficients ozone".
41    
42      ! This subroutine :      ! This subroutine :
43      ! -- reads from a file all eight parameters for ozone chemistry,      ! -- reads from a file all eight coefficients for ozone chemistry,
44      !    at the current day ;      !    at the current day ;
45      ! -- regrids the parameters in pressure to the LMDZ vertical grid ;      ! -- regrids the coefficients in pressure to the LMDZ vertical grid ;
46      ! -- packs the parameters to the "physics" horizontal grid ;      ! -- packs the coefficients to the "physics" horizontal grid ;
47      ! -- combines the eight parameters to define the five module variables.      ! -- combines the eight coefficients to define the five module variables.
   
     ! We assume that, in "coefoz_LMDZ.nc", the pressure levels are in hPa  
     ! and strictly increasing.  
48    
49      use netcdf95, only: nf95_open, nf95_close, nf95_get_coord      use netcdf95, only: nf95_open, nf95_close
50      use netcdf, only: nf90_nowrite      use netcdf, only: nf90_nowrite
51      use regr_pr_coefoz, only: regr_pr_av_coefoz, regr_pr_int_coefoz      use regr_pr_coefoz, only: regr_pr_av_coefoz, regr_pr_int_coefoz
52      use phyetat0_m, only: rlat      use phyetat0_m, only: rlat
# Line 70  contains Line 54  contains
54      integer, intent(in):: julien ! jour julien, 1 <= julien <= 360      integer, intent(in):: julien ! jour julien, 1 <= julien <= 360
55    
56      ! Variables local to the procedure:      ! Variables local to the procedure:
     integer ncid ! for NetCDF  
57    
58      real, pointer:: plev(:)      integer ncid ! for NetCDF
     ! (pressure level of input data, converted to Pa, in strictly  
     ! increasing order)  
   
     integer n_plev ! number of pressure levels in the input data  
   
     real, allocatable:: press_in_edg(:)  
     ! (edges of pressure intervals for input data, in Pa, in strictly  
     ! increasing order)  
59    
60      real coefoz(klon, llm)      real coefoz(klon, llm)
61      ! (temporary storage for an ozone coefficient)      ! (temporary storage for an ozone coefficient)
# Line 104  contains Line 79  contains
79    
80      !------------------------------------      !------------------------------------
81    
82      print *, "Call sequence information: read_coefoz"      print *, "Call sequence information: regr_pr_comb_coefoz"
83    
84      call nf95_open("coefoz_LMDZ.nc", nf90_nowrite, ncid)      call nf95_open("coefoz_LMDZ.nc", nf90_nowrite, ncid)
85    
86      call nf95_get_coord(ncid, "plev", plev)      call regr_pr_av_coefoz(ncid, "a2", julien, a2)
     ! Convert from hPa to Pa because "regr_pr_av" and "regr_pr_int" require so:  
     plev = plev * 100.  
     n_plev = size(plev)  
   
     ! Compute edges of pressure intervals:  
     allocate(press_in_edg(n_plev + 1))  
     press_in_edg(1) = 0.  
     ! We choose edges halfway in logarithm:  
     forall (k = 2:n_plev) press_in_edg(k) = sqrt(plev(k - 1) * plev(k))  
     press_in_edg(n_plev + 1) = huge(0.)  
     ! (infinity, but any value guaranteed to be greater than the  
     ! surface pressure would do)  
   
     call regr_pr_av_coefoz(ncid, "a2", julien, press_in_edg, a2)  
87    
88      call regr_pr_av_coefoz(ncid, "a4", julien, press_in_edg, a4_mass)      call regr_pr_av_coefoz(ncid, "a4", julien, a4_mass)
89      a4_mass = a4_mass * 48. / 29.      a4_mass = a4_mass * 48. / 29.
90    
91      call regr_pr_av_coefoz(ncid, "a6", julien, press_in_edg, a6)      call regr_pr_av_coefoz(ncid, "a6", julien, a6)
92    
93      ! Compute "a6_mass" avoiding underflow, do not divide by 1e4      ! Compute "a6_mass" avoiding underflow, do not divide by 1e4
94      ! before dividing by molecular mass:      ! before dividing by molecular mass:
# Line 138  contains Line 99  contains
99      ! (We use as few local variables as possible, in order to spare      ! (We use as few local variables as possible, in order to spare
100      ! main memory.)      ! main memory.)
101    
102      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)
103    
104      call regr_pr_av_coefoz(ncid, "r_Mob", julien, press_in_edg, coefoz)      call regr_pr_av_coefoz(ncid, "r_Mob", julien, coefoz)
105      c_mob = c_mob - a2 * coeofoz      c_mob = c_mob - a2 * coefoz
106    
107      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)
          coefoz)  
108      c_mob = (c_mob - a6 * coefoz) * 48. / 29.      c_mob = (c_mob - a6 * coefoz) * 48. / 29.
109    
110      call regr_pr_av_coefoz(ncid, "temp_Mob", julien, press_in_edg, coefoz)      call regr_pr_av_coefoz(ncid, "temp_Mob", julien, coefoz)
111      c_mob = c_mob - a4_mass * coefoz      c_mob = c_mob - a4_mass * coefoz
112    
113      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)
114      ! Heterogeneous chemistry is only at high latitudes:      ! Heterogeneous chemistry is only at high latitudes:
115      forall (k = 1: llm)      forall (k = 1: llm)
116         where (abs(rlat) <= 45.) r_het_interm(:, k) = 0.         where (abs(rlat) <= 45.) r_het_interm(:, k) = 0.
117      end forall      end forall
118      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
119    
     deallocate(plev) ! pointer  
120      call nf95_close(ncid)      call nf95_close(ncid)
121    
122    end subroutine regr_pr_comb_coefoz    end subroutine regr_pr_comb_coefoz
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