Impact of Vehicle Soot Agglomerates on Snow Albedo

نویسندگان

چکیده

Snow covers are very sensitive to contamination from soot agglomerates derived vehicles. A spectroradiometric system covering a wavelength 300 2500 nm with variable resolution (from 2.2 7.0 nm) was used characterize the effect of diesel vehicle whose exhaust stream oriented towards limited snowed area. The previously tested in rolling test bench where particle number emissions and size distributions were measured, fractal analysis microscopic images made after collecting individual by means an electrostatizing sampler. Finally, experimental results compared modelled contaminated snow spectral albedo obtained radiative transfer model developed our research group (OptiPar) other models. Both show that increasingly accumulated mass reduces constant rate around 0.03 units per mg/kg, predominant on UV-VIS range. Based small primary particles (around 25 nm), Rayleigh-Debye-Gans approximation, further corrected account for multiple scattering within agglomerates, revealed as appropriate technique model.

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ژورنال

عنوان ژورنال: Atmosphere

سال: 2022

ISSN: ['2073-4433']

DOI: https://doi.org/10.3390/atmos13050801