Dynamics of optical-microphysical characteristics of smokes from Siberian wildfires in the Big Aerosol Chamber at the stages of smoke generation and aging

Microphysical parameters of smoke aerosols based on the results of inversion of aerosol scattering and extinction coefficients in a big aerosol chamber of IAO SB RAS

“…Studies of the aerosol optical and microphysical characteristics formed as a result of thermal influence on wood materials were carried out at the IAO SB RAS in a closed volume of a small-sized chamber 28 and in a Big aerosol chamber [29][30] . Optical measurements were carried out using a polarization spectral nephelometer [28][29][30] and atmospheric path transparency meter 31 .…”

Variability of monthly average characteristics of the aerosol condensation activity in annual behavior

“…Small values γ in summer are caused by often plumes of remote forest fires, whose hygroscopicity is low. 26,27 This is the reason, that in some years, when there are especially many smoke plumes, it does not exceed 0.1 (2012 and 2016).…”

Wildfire plume ageing in the Photochemical Large Aerosol Chamber (PHOTO-LAC)

“…For the characterisation of the LAC homogeneity, the LAC was equipped with a modernised path photometer of atmospheric spectral transmittance, operating in the wavelength ( λ ) range from 0.45 to 3.9 μm. 42,43 The photometer of atmospheric spectral transmittance also monitors the radiation extinction for particles with a radius r > λ /5 μm. 44 Measurements of aerosol extinction in the IR spectral range at a wavelength λ = 3.9 μm provide information on the content of particles with a radius r > 0.8 μm (coarse particles).…”