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        Multiwavelength Raman lidar observations of particle growth during long-range transport of forest-fire smoke in the free troposphere

        Author
        Mueller, D.
        Mattis, I.
        Ansmann, A.
        Wandinger, U.
        Ritter, C.
        Kaiser, D.
        Attention
        2299/11271
        Abstract
        We present particle effective radii and Angstrom exponents of aged free-tropospheric forest-fire smoke. The particle plumes were observed with different multiwavelength Raman lidars downwind of the fires that burned in boreal areas of the northern hemisphere. We find an increase of particle size, respectively decrease of the Angstrom exponent with transport time which was more than two weeks in some of the investigated cases. Mean effective radii were as large as 0.4 mu m. Mean Angstrom exponents were as low as 0.04 for the wavelength pair at 355/532 nm. A fit curve that describes particle growth with time is derived. Particle growth levels off after approximately ten days of transport time.
        Publication date
        2007-03-02
        Published in
        Geophysical Research Letters
        Published version
        https://doi.org/10.1029/2006GL027936
        Other links
        http://hdl.handle.net/2299/11271
        Relations
        School of Physics, Astronomy and Mathematics
        Metadata
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