Atmospheric aerosols play a key role in the Earth’s atmosphere, affecting the formation of clouds and their lifetime, the distribution and amount of trace gases, and the radiative balance. Aerosols also affect human health, air quality, and visibility conditions. Aerosols are formed from various natural and anthropogenic sources and are emitted to the atmosphere from the earth’ surface by wind-driven processes, such as mineral dust or sea spray, by volcanic eruptions, biomass burning and other combustion processes, or formed in the atmosphere (secondary particles) by gas-to-particle conversion