FlexAOD logo GEOS-Chem logo

A GEOS-Chem post-processing tool for Aerosol Optical Properties calculations

Written by Gabriele Curci

Quick Links

FlexAOD publications

  • Lefevre, J., Menkes, C., Bani, P., Marchesiello, P., Curci, G., Grell, G. A., Frouin, R. (2015), Distribution of sulfur aerosol precursors in the SPCZ released by continuous volcanic degassing at Ambrym, Vanuatu, Journal of Volcanology and Geothermal Research, doi: 10.1016/j.jvolgeores.2015.07.018 [full-text (pdf, 3.0 Mb)]
  • Curci, G., Hogrefe, C., Bianconi, R., Im, U., Balzarini, A., Baro, R., Brunner, D., Forkel, R., Giordano, L., Hirtl, M., Honzak, L., Jimenez-Guerrero, P., Knote, C., Langer, M., Makar, P.A., Pirovano, G., Perez, J.L., San Jose, R., Syrakov, D., Tuccella, P., Werhahn, J., Wolke, R., Zabkar, R., Zhang, J., Galmarini, S. (2015), Uncertainties of simulated aerosol optical properties induced by assumptions on aerosol physical and chemical properties: an AQMEII-2 perspective, Atmos. Environ., 115, 541-552, doi: 10.1016/j.atmosenv.2014.09.009 [Open Access full-text]
  • Curci, G. (2013), Sensitivity tests with GEOS-Chem aerosol optical properties in comparison with satellite and sunphotometer, 6th International GEOS-Chem Meeting, Harvard University, Cambridge, MA, USA, 6-9 May 2011. [Presentation (pdf, 4.2 Mb)]
  • Curci, G., (2012), FlexAOD: A Chemistry-transport Model Post-processing Tool for A Flexible Calculation of Aerosol Optical Properties, Proceedings of the 9th International Symposium on Tropospheric Profiling, L'Aquila, Italy, September 2012, ISBN/EAN: 978-90-815839-4-7, [full-text (pdf, 370 kb)] [PowerPoint Presentation (pptx, 3.2 Mb)]
  • Curci, G. (2011), A new GEOS-Chem post-processing tool for aerosol optical properties calculations, 5th International GEOS-Chem Meeting, Harvard University, Cambridge, MA, USA, 2-5 May 2011. [Presentation (pdf, 1.9 Mb)]
  • Short description

    Primary motivation for development of FlexAOD (Flexible Aerosol Optical Depth) is the increasing availability of ground-based (e.g. AERONET) and satellite-based (e.g. MISR and CALIPSO) measurements of atmospheric aerosol optical properties. In addition to Aerosol Optical Depth (AOD) at several wavelengths, also other properties such as the Single Scattering Albedo or the Size Distribution are becoming more common products.

    The standard on-line AOD diagnostic of GEOS-Chem chemistry-transport model (see GEOS-Chem wiki for details) may pose limits to full exploitation of the information content of aerosol observations in combination with model simulations. FlexAOD is aimed at filling this gap. The development of the code stems from the on-line AOD diagnostic of GEOS-Chem: aerosol optical properties are calculated for 6 «optical» aerosol species (inorganic ions (sulfate + nitrate + ammonium), organic carbon, blank carbon, sea salts, and soil dust) assumed as externally mixed. In its present version, FlexAOD allows the user to:

    The capabilities of FlexAOD will be gradually expanded. A few developments are on the pipeline (e.g. options for aerosol internal mixing assumptions, AERONET-like output variables, size-limited calculations (e.g. AOD due to particles less than 1 µm), more flexible treatment of GEOS-Chem species), and others might be coming out from the user community.

    Please address any comment/suggestion to the author!


    ASI This activity is supported by the Italian Space Agency (ASI) in the frame of PRISMA.