Aircraft observations of the microphysical and optical properties of major aerosol species |
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| Institution: | 1. Laboratory of Atmospheric Pollution and Pollution Control Engineering of Atmospheric Pollutants, Department of Environmental Engineering, Democritus University of Thrace, 67100 Xanthi, Greece;2. Department of Meteorology and Climatology, School of Geology, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece;3. Laboratory of Atmospheric physics, Physics Department, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece;4. Department of Physics, University of Girona, 17071 Girona, Spain;5. Instituto Pirenaico de Ecología, Consejo Superior de Investigaciones Científicas (CSIC), 50059 Zaragoza, Spain;1. CONICET - Centro de Excelencia en Productos y Procesos de la Provincia de Córdoba (CEPROCOR). Sede Santa María de Punilla, Pabellón Ceprocor (X5164), Córdoba, Argentina;2. Facultad de Química e Ingeniería, Pontificia Universidad Católica Argentina. Av. Pellegrini 3314 (2000), Rosario, Santa Fe, Argentina;3. Laboratorio de Radiación Solar Ultravioleta, Departamento de Física, Facultad de Ciencias, Universidad de Tarapacá, Casilla 7-D, Arica, Chile |
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| Abstract: | We summarise the microphysical and optical parameters of some principal aerosol species obtained by instrumentation on the UK Met Office C-130 aircraft during international field campaigns since 1996. The aerosol species include Saharan dust, biomass burning aerosol, European continental pollution, eastern seaboard USA pollution, and clean maritime aerosol. The typical structure of the aerosol in the vertical from each airmass type is described. Microphysical parameters are described that comprise the mode radius and geometric standard deviation associated with 2–3 lognormal fits to the mean observed aerosol size distributions spanning the accumulation and coarse modes. Optical parameters comprising the aerosol single scattering albedo (which was both measured and derived from Mie theory), specific extinction coefficient, and asymmetry factor (which were derived from Mie theory) are also presented. Where available, evolution of the physical and optical properties of the aerosol has been highlighted. Comparisons with long-term ground-based AERONET aerosol retrievals show reasonable agreement. Our observations provide useful data for validating and improving global circulation models (GCMs) that use physically based aerosol representation and for validating satellite retrievals of the physical and optical properties of aerosols. |
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