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Gabriele Curci

A CHEMISTRY-TRANSPORT MODEL POST-PROCESSING TOOL FOR A FLEXIBLE CALCULATION OF AEROSOL OPTICAL PROPERTIES. τ ( λ ), ω ( λ ), g ( λ ), m ( λ ), dV /d log(r), …. Gabriele Curci. CETEMPS Dept . Physical and Chemical Sciences University of L’Aquila gabriele.curci@aquila.infn.it.

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Gabriele Curci

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  1. A CHEMISTRY-TRANSPORT MODEL POST-PROCESSING TOOL FOR A FLEXIBLE CALCULATION OF AEROSOL OPTICAL PROPERTIES τ(λ), ω(λ), g(λ), m(λ), dV/d log(r), … Gabriele Curci CETEMPS Dept. Physical and ChemicalSciences Universityof L’Aquila gabriele.curci@aquila.infn.it 9th International Symposium on Tropospheric Profiling, 3-7 September 2012, L’Aquila, Italy

  2. CURRENT VERSION BASED ON GEOS-Chem OUTPUT Bulk aerosol (mass only) chemistry-transport model Need to assign RH-dependent size distributions and species densities Species 1 If external mixing and spherical particles are assumed: dN / d ln r σg RH rm ln r Mie parameters averaged over size distributions may be pre-tabulated as a function of RH, and then used to calculate e.g. AOD at each time step and grid cell: Species 2 . . . Species N

  3. INTERNAL MIXING OPTIONS homogeneous mixing core/shell mixing Species combine in a new size distribution at each time step and grid cell Species 1 Distribution average Mie parameters are not useful anymore Species 2 Radius-by-radius calculations using Mie parameters tabulated as a function of size and refractive index (CPU time x 10 w.r.t. external mixing) Species N . . .

  4. MISR SPECTRAL AODCONSTRAINT ON MASS AND SIZE DISTRIBUTION 443 nm 865 nm MISR GEOS-Chem GC - MISR

  5. MISR SPECTRAL AODCONSTRAINT ON MASS AND SIZE DISTRIBUTION 443 nm 865 nm MISR GEOS-Chem GC - MISR

  6. AERONET EFFECTIVE RADIUSCONSTRAINT ON SIZE DISTRIBUTION

  7. AERONET VOLUME CONCENTRATIONCONSTRAINT ON SIZE DISTRIBUTION AND MASS

  8. AERONET REFRACTIVE INDEX (REAL)CONSTRAINT ON COMPOSITION

  9. AERONET REFRACTIVE INDEX (IMAGINARY)CONSTRAINT ON COMPOSITION 10^

  10. AERONET SINGLE SCATTERING ALBEDOCONSTRAINT ON MIXING EXTERNAL MIXING CORE/SHELL MIXING

  11. INPUT TO RADIATIVE TRANSFER MODEL (LIBRADTRAN)

  12. FUTURE DEVELOPMENTS • Complete debugging and release version with internal mixing option and AERONET-like output • Extension to sectional and modal aerosol models • Definition of a general input format. Also useful to input idealized profiles • Continued implementation of more flexible input/output options

  13. CONCLUDING REMARKS IN DEVELOPMENT! IF INTERESTED IN FlexAOD … JUST LET ME KNOW! gabriele.curci@aquila.infn.it

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