Automated instruments for measuring of (1) the dust aerosol particle concentrations and the dust aerosol particle size distribution function, (2) the vertical turbulent fluxes of the dust aerosol and (3) the electric characteristics of the windsand flux. The dust aerosol particle concentrations in the range from 0.5 to 5.0 mcm at heights 2 m and 20 cm were measured. The vertical turbulent fluxes and the uplift rate (reached 5 cm/s) of the dust aerosol were determined. Influence of the convective structures on the emission and turbulent fluxes of the dust aerosol was found. It was established that the average volume electric charge of the dust aerosol reached – 70 nC/m3 and the electric charge density at the surface did not exceed + 25 nC/m2 .
Aleurite particle saltation trajectories have been calculated using the saltation dynamics model. Variability of the saltation trajectory parameters including of the height, range and particle flight time was analyzed. Saltation parameter dependencies from particle diameter and the friction velocity are approximated. Influence the lift-off velocity and the lift-off angle on the aleurite particle saltation trajectories was considered. Sliding coefficient dependencies from time during aleurite saltating particle transport were received for the various values of the particle diameter, friction velocity, lift-off velocity and lift-off angle.
An analysis of smoke haze over Europe in July 2016 caused by the wildfires in Siberia has been carried out. Surface air pollution by aerosols in Moscow region during the smoke event was also investigated. It was found that optical and microphysical characteristics of the smoke aerosol in Europe were typical for the boreal forest fires. The aerosol radiative forcing (ARF) variations at the top of the atmosphere (TOA) and the bottom of the atmosphere (BOA) during the smoke haze period were analyzed. The regional mean direct radiative forcing of aerosols at the TOA and BOA on 26 July 2016 were estimated to be -25 and -45 W/m2 respectively. Probability distribution function of ARF values at the TOA was presented.
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