Indices of refraction, integrated optical properties  of aerosol particles&FORTRAN code 

The data used and calculated at Laboratory for Information Technologies and Mathematical Simulation (LITMS) of Institute of Molecular Physics at Russian Research Center "Kurchatov Insitute"

Detailed description of these data can be found in the paper A. Rublev, "Algorithm and calculations of the aerosol phase functions", Internal Note IAE-5715/16, Russian Research Center "Kurchatov Institute", 1994 (in Russian). Click here to download its extended abstract in English (WinWord 6.0 file).

Table 1. Complex indices of refraction of basic aerosol components m=P-iQ


Substance
File
File format: Wvlength (mcr)  P  Q

 
Reference
Water (liquid)
h2o.ref
Zolatarev et al. 1984
Dust
dust_l.ref
Zolatarev et al. 1984
75 % H2SO4
h2so4.ref
Zolatarev et al. 1984
Sea selt
ocean.ref
Zolatarev et al. 1984
Soot
soot.ref
Zolatarev et al. 1984
Volcanic ash
volc_ash.ref
Zolatarev et al. 1984
Water-soluable particles
w_s.ref
Zolatarev et al. 1984

Table 2. Integrated optical properties(*) of principal aerosol models (WMO publication, 1986)(**) calculated using the Mie theory in a paper by Rublev, 1994


Aerosol model Basic aerosol constituents Volume relative concentration (%) Particle number relative concentration 
File
(format of files)(***)
Continental
Dust-Like
Water-Soluble
Soot
70
29
1
2.26278-06
9.37437-01
6.25607-02
s_cont.dat
Urban
Water-Soluble
Soot
Dust-Like
61
22
17
5.88931-01
4.11069-1
1.64128-07
s_urb.dat
Maritime
Ocean
Water-Soluble
95
5
4.29942-04
9.99573-01
s_mar.dat
Stratospheric
75%  H2SO4
100
1.0
s_h2so4.dat
Volcanic
Volcanic Ash
100
1.0
s_volc.dat
Cloudy (**)
Water
100
1.0
s_cloud.dat
(*)    Extinction coefficient (km-1), calculated for a number N of particles= 1 particle per  cm-3; single scattering albedo; assymetry factor; normalization factor- see a paper by A. Rublev for details.
(**) For cloudy aerosol model the extinction coefficient has been calculated for a number N of particles= 353.678 particles per cm-3, corresponding to a typical water content in clouds W=0.3 g m-3,  using the gamma aerosol size distribution from (Handbook, 1989)- see a paper by A. Rublev for detail.

Table 3. Integrated optical properties of the basic aerosol constituents calculated in a paper by A. Rublev using a Mie theory for a number of particles N=1 particle per cm-3


 
Basic aerosol constituents
File
File format(***):  Num  Wvlen  Sigma  w  g  K
Dust-like particles
s_dust.dat
water-soluble particles
s_w_s.dat
Soot
s_soot.dat
Oceanic
s_oc.dat

(***) Num- line number; Wvlen- wavelength (micrometers); Sigma- extinction coefficient (km-1); w- single scattering albedo; g-assymetry factor; K- normalization factor (see  paper by A. Rublev for explicit formulas)

Calculation of optical characteristics of atmospheric aerosols composed from basic aerosol constituents (the AERCOMP FORTRAN code)

The FORTRAN code AERCOMP (UNIX version) developed at LITMS (Institute of Molecular Physics, Russian Research Center "Kurchatov Institute") by Dr. A.N. Rublev. It allows calculations of the above mentioned (**) aerosol integrated optical properties for more complex, composite aerosol models, in the same format as that for *.dat files from Tables 2,3.

To download and install this software:

Description and use of the AERCOMP program.

The aerocomp.f program uses the following files:

The user should set up parameters of an aerosol of interest filling up the fields of inp_comp.dat file (see Table 4) and run the executable aercomp. The inp_comp.dat file delivered with this software package,provides calculations of  integral optical characteristics of the continental aerosol model (WMO publication, 1986), outputing them into s_cont1.dat (ASCII) and i_cont1.dat (binary) files. Note that the binary file i_cont1.dat can be used as an input file for aercomp.f program in order to compose more compex aerosol models.
All questions and notes concerning the use of this program can be e-mailed to Mr. Alexey Chursin.

Table 4. An example of inp_comp.dat file delivered with this software package (parameters in italic can be changed by the user for own calculations)


 
3                     n_comp       -  NUMBER OF AEROSOL COMPONENTS
13                   n_m0           -  NUMBER OF WAVELENGTHS
lm_sh.dat         name_m0    -  NAME  OF THE FILE FOR WAVELENGTHS
181                  n_ug0         -  TOTAL NUMBER OF NODAL ANGULAR POINTS
ug_204.dat       name_ug0   -  NAME  OF THE FILE OF ANGULAR NODAL POINTS
s_cont1.dat       s_dat          -  NAME  OF THE OUTPUT FILE FOR EXTINCTION
i_cont1.dat        i_dat           -  NAME  OF THE OUTPUT FILE FOR PHASE FUNCTION
**************************************************************************
61                      n_m           -  NUMBER OF NODAL POINTS FOR WAVELENGTHS
i_dust.dat           nc_ind        -  NAME  OF THE INPUT FILE FOR PHASE FUNCTION
2.26278E-6       si                -  NUMBER OF PARTICLES OF THIS KIND
lm_sh.dat            name_m     -  NAME  OF THE  FILE FOR WAVELENGTHS
204                    n_ug           -  TOTAL NUMBER OF ANGULAR NODAL POINTS
ug_204.dat         name_ug     -  NAME  OF THE FILE FOR ANGULAR POINTS
**************************************************************************
61                      n_m            -  NUMBER OF NODAL POINTS FOR WAVELENGTHS
i_w_s.dat           nc_ind         -  NAME  OF THE INPUT FILE FOR PHASE FUNCTION
0.937437           si                 -  NUMBER OF PARTICLES OF THIS KIND
lm_sh.dat            name_m      -  NAME  OF THE  FILE FOR WAVELENGTHS
204                     n_ug           -  TOTAL NUMBER OF ANGULAR NODAL POINTS
ug_204.dat          name_ug     -  NAME  OF THE FILE FOR ANGULAR POINTS
**************************************************************************
61                       n_m            -  NUMBER OF NODAL POINTS FOR WAVELENGTHS
i_soot.dat            nc_ind         -  NAME  OF THE INPUT FILE FOR PHASE FUNCTION
0.0625607          si                 -  NUMBER OF PARTICLES OF THIS KIND
lm_sh.dat             name_m      -  NAME  OF THE  FILE FOR WAVELENGTHS
204                      n_ug           -  TOTAL NUMBER OF ANGULAR NODAL POINTS
ug_204.dat           name_ug     -  NAME  OF THE FILE FOR ANGULAR POINTS
**************************************************************************
 

References

1. A. Rublev, "Algorithm and calculations of the aerosol phase functions", Internal Note IAE-5715/16, Russian Research Center "Kurchatov Institute", 1994 (in Russian).
2. World Meteorology Organization (WMO) publication: "A preliminary cloudless standard atmosphere for radiation computation", WCP-112, WMO/TD-NO. 24 (1986)
3. Zolatarev V.M., Morozov V.M., and E.V. Smirnova, "Optical constants of natural and technology media", 216 pp., Leningrad, 1984 (in Russian)
 

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