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``` author: Di Antonio Ludovico

mail: ludovico.diantonio@lisa.ipsl.fr

Version: v1.0 Reference: Di Antonio et al, 2024

This program is used to calculate the aerosol complex refractive index from: - aerosol absorption coefficient ($\beta_{abs}$ Mm-1) - aerosol scattering coefficent ($\beta_{sca}$ Mm-1) - aerosol particle size distribution (e.g. dN/dlog #.cm-3)

Inputs

input data are under inputs folder:

1. aux_inputs contains:
   1. 1.size_diameters.dat (a file with two columns 1: particle diameters (nm) and dlog)
   2. shape_factor.dat for each particle diameter
   3. wl_input.dat, a column of wavelengths in nm for the OPTCRI output i.e. (370, 470, 520,...))
2. config contains an input.sed file to drive the configuration of the program
3. data contains the input tab-separated files of absorption, scattering and size distribution data. Date is in the %Y-%m-%d %H:%M:%S format. the data folder contains a subfolder for the station (i.e. PRG) and other subfolders for the sensitivity tests inputs (i.e. CTRLmeanSMPS). An example of the file is:

``` inputs/data/PRG/CTRLmeanSMPS/absorptionCTRL.csv TIME ABSCOEFF(370) ABSCOEFF(470) ABSCOEFF(520) ABSCOEFF(590) ABSCOEFF(660) ABSCOEFF(880) ABSCOEFF(950) 2022-06-15 00:00:00 16.297511078834184 11.97029132079622 10.46485663028755 8.781774642197588 7.633109543864801 5.471914732366452 5.092368220873601

```

1. LUT (contains the Look up tables created from created with the LUT=0 option in the *.sed file)

Before launching the program, install the conda environment:

bash conda env create -f CONDA_ENV.yaml

For the PRG (urban) site, modify the following file:

optcri.PRG.sed

( it will look for a file like optcri.$site.par where $site is PRG)

Afterwards it is necessary to create the LUT. In this regards run the program with $lutflag=0:

bash ./run.sh This will create LUT tables under input/LUT/PRG/.

Now you can set $lutflag==1 and run th file (./run.sh).

you can run OPTCRI also by running: bash ./optcri.sh optcri.par dstart dend ndays where dstart is the starting day in %Y%m%d format where dend is the ending day in %Y%m%d format ndays is the is the ending day in %Y%m%d format

optcri.par is a generic par that you have to modify to your needs.

Absorption, scattering and particle size distribution LEVEL 2 input data are avaialable at https://across.aeris-data.fr/

Reference

Di Antonio, L., Di Biagio, C., Formenti, P., Gratien, A., Michoud, V., Cantrell, C., Bauville, A., Bergé, A., Cazaunau, M., Chevaillier, S., Cirtog, M., Coll, P., D'Anna, B., de Brito, J. F., De Haan, D. O., Dignum, J. R., Deshmukh, S., Favez, O., Flaud, P.-M., Gaimoz, C., Hawkins, L. N., Kammer, J., Language, B., Maisonneuve, F., Močnik, G., Perraudin, E., Petit, J.-E., Acharja, P., Poulain, L., Pouyes, P., Pronovost, E. D., Riffault, V., Roundtree, K. I., Shahin, M., Siour, G., Villenave, E., Zapf, P., Foret, G., Doussin, J.-F., and Beekmann, M.: Aerosol spectral optical properties in the Paris urban area, and its peri−urban and forested surroundings during summer 2022 from ACROSS surface observations, EGUsphere [preprint], https://doi.org/10.5194/egusphere-2024-2299, 2024.

Please, report any issues to @mail

Reference https://doi.org/10.5281/zenodo.14014328