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What is El Niño?

A periodic warming of sea surface temperatures in the central and eastern Pacific Ocean, significantly influencing global weather patterns, including increased rainfall in some regions and drought in others.

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Glossary

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

A term used to identify clouds with a base height below 6,000 feet in the observer's direction. Stratiform clouds consist...

The lowest level of a given cloud or cloud layer in the atmosphere, relative to the observer's position above the ground.

A small, intense downdraft that produces damaging winds at the surface, typically lasting a few minutes and often associated...

The situation where there is no advection because the constant pressure surfaces and temperature surfaces in the atmosphere...

The upward movement of air caused by a topographic barrier, such as a mountain, which can lead to cloud formation and precipitation.

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

A condition in which the stratification of the atmosphere depends on both air temperature and pressure, and where surfaces...

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

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