Rare gases in the atmosphere, like Argon, ozone or sulphur and nitrogen oxides.

In our Image Library you'll find a lot of scientific terminology, this glossary provides explanations for much of that terminology.

Transport of an atmospheric property by wind.

Smoke, dust, ash and SO2

A faint emission of light by a planetary atmosphere. Also called nightglow.

The boundary between two air masses. Also includes: Frontal boundary.

Large-scale circulation of winds. Also includes: High pressure, Subtropical High Pressure Belt.

Also includes: Meteor, meteorite and meteorid

Introduction into the atmosphere of chemicals, particulates, or biological materials that cause damage to humans, other living organisms and the environment. Also includes: SO2

Horizontal flow of water vapour in the atmosphere, roughly in opposite direction of the big rivers. It can, under certain conditions, lead to heavy rainfall and flooding.