Aerosols vary in composition, size, concentration, and source. They profoundly affect climate, visibility, human health, and biogeochemical cycling. Particle sizes are determined by the mechanism ...

This is known as tropospheric ducting and it can distort, or prevent radio reception. What causes tropospheric ducting? Normally, the higher you go into the atmosphere, the colder it is.

This is known as tropospheric ducting and can distort or prevent television reception. What causes Tropospheric Ducting? Normally, the higher you go into the atmosphere, the colder it is.