Aerosols are mixtures of gas and suspended solid particles (smoke) or droplets (mist, spray) - ranging from tiny nanoparticles to visible dust.
Aerosols are created by burning, spraying or abrasion, ...
... are formed by chemical reactions in the atmosphere and when several molecules group into particles or droplets, ...
... and, as particles, can also contain bacteria or viruses, spores or pollen.
Aerosols influence cloud formation and climate. In humans, they can lead to allergies and diseases, for example of the respiratory tract. They can be used specifically in sprays.
times thinner than a human hair - the smallest aerosol particles are measured at 1 nanometre. Coarse particles can even be thicker than hair.
Field observations, laboratory experiments and modelling on
- Sources of aerosol
- Composition and particle size distribution of aerosols
- Chemical transformation in the atmosphere
- Influence on cloud formation
- Role in climate events
- Impact on air quality
Illustrations: Diane Köhne