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Exceptional aerosol pollution plume observed using a new ULA-lidar approach
Abstract An exceptional particulate pollution event was sampled in June 2005 over the Ardèche region in Southern France. Airborne (at the wavelength of 355 nm) and ground-based (at the wavelength of 532 nm) lidars performed measurements simultaneously. Airborne observations were performed from an ultra-light aircraft (ULA); they offer an opportunity to test a new method for inversing lidar profiles which enables their quantitative use while the airplane flies in a scattering layer. Using the results of this approach and the ground-based lidar measurements, the aerosol plumes have been optically quantified and the diversity of particle sources (from Western Europe, North Africa and even North America) which contributed to the event has been highlighted using both spaceborne observations and multiple air mass back-trajectories.
Highlights New algorithm for processing of nadir-pointing lidar profiles. Evidence of complex aerosol mixing during an exceptional pollution event. Inversion of airborne lidar measurements despite flying in a scattering layer. Contribution of North-American aerosol source to pollution event in south of France. Complementarity between ground-based and airborne lidar measurements.
Exceptional aerosol pollution plume observed using a new ULA-lidar approach
Abstract An exceptional particulate pollution event was sampled in June 2005 over the Ardèche region in Southern France. Airborne (at the wavelength of 355 nm) and ground-based (at the wavelength of 532 nm) lidars performed measurements simultaneously. Airborne observations were performed from an ultra-light aircraft (ULA); they offer an opportunity to test a new method for inversing lidar profiles which enables their quantitative use while the airplane flies in a scattering layer. Using the results of this approach and the ground-based lidar measurements, the aerosol plumes have been optically quantified and the diversity of particle sources (from Western Europe, North Africa and even North America) which contributed to the event has been highlighted using both spaceborne observations and multiple air mass back-trajectories.
Highlights New algorithm for processing of nadir-pointing lidar profiles. Evidence of complex aerosol mixing during an exceptional pollution event. Inversion of airborne lidar measurements despite flying in a scattering layer. Contribution of North-American aerosol source to pollution event in south of France. Complementarity between ground-based and airborne lidar measurements.
Exceptional aerosol pollution plume observed using a new ULA-lidar approach
Chazette, Patrick (author)
Atmospheric Environment ; 141 ; 470-480
2016-07-06
11 pages
Article (Journal)
Electronic Resource
English
| Elsevier | 2021