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Journal Article: ID no. (ISBN etc.):  0013-936X BibTeX citation key:  Chazette2007a
Chazette, P., Sanak, J. & Dulac, F. (2007) New Approach for Aerosol Profiling with a Lidar Onboard an Ultralight Aircraft: Application to the African Monsoon Multidisciplinary Analysis. IN Environmental Science & Technology, 41. 8335–8341.
Added by: roussot 2010-08-23 16:22:44    Last Edited by: Fanny Lefebvre 2010-09-23 10:24:38
Categories: Aerosol and Chemistry
Creators: Chazette, Dulac, Sanak
Collection: Environmental Science & Technology

Peer reviewed
Number of views:  1059
Popularity index:  55.91%
Maturity index:  published

A new airborne instrumental payload has been designed for an ultralight aircraft to determine the vertical profile of aerosol optical p roperties. It is based on Lidar Aérosols UltraViolet Aéroporté (LAUVA), a compact backscattering lidar system emitting at the wavelength of 355 nm. We operated this airborne configuration in the Sahel from the city of Niamey (Niger) during the first campaign of the African Monsoon Multidisciplinary Analysis (AMMA) in January−February 2006, when aerosols from both soil dust and savannah fires cause large visibility reductions. We take advantage of the lidar capability of pointing in different directions for retrieving the vertical profile of the aerosol backscatter to extinction ratio (BER). A synergy with a scatterometer (880 nm) and a ground-based sunphotometer allows us to further determine the vertical profile of Angström exponent (a). We identify three types of aerosol layers up to about 5 km below the free troposphere, dominated by biomass burning (BB) particles, mineral dust (D) particles, and a mixing between BB and D particles, respectively, associated with BER (a) values close to 0.008 sr−1 (1.5), 0.025 sr−1 (0), and 0.015 sr−1 (0.4–1).
Added by: roussot    Last Edited by: Fanny Lefebvre