Dark blue cloudy sky

What is Relative Humidity?

The percentage of water vapor in the air relative to the maximum amount of water vapor the air can hold at a given temperature.

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Glossary

Convection is the vertical movement of air caused by temperature differences, where warm air rises and cool air sinks. It...

Occurs when centers of high pressure and/or low pressure set up over a region in such a way that they prevent other weather...

Thermodynamic changes occurring within a system without any exchange of heat with the surroundings. In the atmosphere, changes...

A polar vortex is a circulating mass of air in the atmosphere, typically found in polar regions. This rotating air mass occurs...

An instrument used to measure the speed, force, and sometimes the direction of the wind. It can be cup or pressure tube anemometers....

Although it is also used for light winds, it is the general name given to the daily cyclical winds that occur mostly between...

Air laden with sand and dust, common in areas devoid of permanent vegetation, especially deserts.

A closed low, also known as a cut-off low, is a low-pressure system that is entirely isolated from the main atmospheric circulation...

The formation of fog when warm and moist air passes over a cool or cold surface or, conversely, when cold air passes over...

A body that has the property of absorbing all electromagnetic radiation falling on it, and therefore is the theoretical body...