European Facility For Airborne Research

European Facility For Airborne Research May 24, 2024, 02:45


Title Vertical profiles of urban aerosol complex refractive index in the frame of ESQUIF airborne measurements
Type Publication

A synergy between lidar, sunphotometer and in situ measurements has been applied to airborne observations performed during the Etude et Simulation de la QUalité de l'air en Ile-de-France (ESQUIF), enabling the retrieval of vertical profiles for the aerosol complex refractive index (ACRI) and single-scattering albedo with a vertical resolution of 200 m over Paris area. The averaged value over the entire planetary boundary layer (PBL) for the ACRI is close to 1.51(±0.02)–i0.017(±0.003) at 532 nm. The single-scattering albedo of the corresponding aerosols is found to be ~0.9 at the same wavelength. A good agreement is found with previous studies for urban aerosols. A comparison of vertical profiles of ACRI with simulations combining in situ measurements and relative humidity (RH) profiles has highlighted a modification in aerosol optical properties linked to their history and the origin of the air mass. The determination of ACRI in the atmospheric column enabled to retrieve vertical profiles of extinction coefficient in accordance with lidar profiles measurements.

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RAUT Jean-christophe
Journal Atmospheric Chemistry and Physics
Volume 8
Pages 901-919
Year 2008
Times cited 0
Institute country France
Type of science
  • Aerosol chemistry and physics
  • Urban studies
Field of science
  • Troposphere
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