OPTSIM

A numerical tool for gas and particles radiative properties modeling

Developed by the team

NEW:
OPTSIM is now in free access, registration form is removed.

For questions, please send an e-mail to optsim@lmd.polytechnique.fr

What is OPTSIM?
OPTSIM is a numerical tool dedicated to calculate optical properties in the troposphere from modelled aerosols concentrations fields.



  • Aerosol Optical Thickness estimation for several wavelengths (all aerosols types)
  • Homogeneous or core-shell mixing for refractive index and optical properties calculations
  • Lidar backscattered signal simulation for direct comparisons with CALIOP and PARASOL satellite level 1 data.
  • OPTSIM is written in Fortran 90 and uses NetCDF model files as inputs
  • Example of lidar simulator use, [Stromatas et al., 2012]
    Source code and documentation
    • The documentation in PDF: optsim-guide.pdf
    • There is two versions of OPTSIM v1, depending on the CHIMERE aerosol output format:
      1. For CHIMERE output before v2017, with aerosol in tables as p01AERO, p02AERO etc. (one table per aerosol and per bin): optsim_v1_p01AERO.tar
      2. For CHIMERE output after v2017, with aerosol in tables as bAERO (one table per aerosol and for all bins): optsim_v1_bAERO.tar
    Informations
    Peer reviewed literature
    1. Stromatas S., S. Turquety, L. Menut, H. Chepfer, G. Cesana, J.-C. Pere, and B. Bessagnet Lidar Signal Simulation for the Evaluation of Aerosols in Chemistry-Transport Models, Geoscientific Model Development, 5, 1543-1564,

    2. Vuolo M.R., H.Chepfer, L.Menut and G.Cesana, 2009, Comparison of mineral dust layers vertical structures modelled with CHIMERE-DUST and observed with the CALIOP lidar, Journal of Geophysical Research - Atmospheres , Vol. 114, D09214, doi:10.1029/2008JD011219,

    The OPTSIM code is provided under the GNU General Public License (since 2012)
    Copyright (C) Institut Pierre-Simon Laplace, C.N.R.S.
    This server is located at the Ecole Polytechnique, Site Editor: Laurent MENUT