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22 October 2013 Vertically resolved optical and microphysical properties of Portuguese forest fire smoke observed in February 2012
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Abstract
For the first time fresh biomass burning aerosol from wild fires in the north of Portugal was studied in detail by analysing profiles of optical and microphysical particle properties obtained from multiwavelength Raman lidar measurements. During the driest February since 1931, in 2012, an unusual high number of forest fires occurred in the north of the country. Despite the strong fires and back-trajectories directly crossing the burning areas, the optical and microphysical properties indicate a mixture of the biomass burning smoke with dust from the dried out soil of the Iberian peninsula or with other aerosol types. The layer means of the particle effective radius, the real part of the complex refractive index (CRI), and the imaginary part of the CRI ranged, respectively, from 0.20 μm to 0.30 μm, from 1.52 to 1.64, and from 0.009 to 0.017. The large single scattering albedo between 0.92 and 0.96, 0.92 and 0.96, and 0.88 and 0.94 at 355, 532 and 1064 nm, respectively, indicate weak absorption.
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Jana Preißler, Sérgio Pereira, Ana Maria Silva, and Frank Wagner "Vertically resolved optical and microphysical properties of Portuguese forest fire smoke observed in February 2012", Proc. SPIE 8894, Lidar Technologies, Techniques, and Measurements for Atmospheric Remote Sensing IX, 88940Y (22 October 2013); https://doi.org/10.1117/12.2029184
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