Dark blue cloudy sky

What is La Niña?

A periodic cooling of sea surface temperatures in the central and eastern Pacific Ocean, often leading to altered global weather patterns such as reduced rainfall in some areas and increased rainfall in others.

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Glossary

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

Observation of the sky from the observer's location where there are no clouds, and there is no obstruction to visibility....

The trapping of heat in the Earth's atmosphere due to greenhouse gases, such as carbon dioxide and methane, which allows...

A cold front is the leading edge of a cold air mass that replaces a warmer air mass. It is typically associated with sudden...

Cloud condensation nuclei are tiny particles in the atmosphere, such as dust, salt, or pollutants, that provide surfaces...

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

A mass of very cold, dry air that mostly originates over the Arctic Ocean.

A thick cloud of tiny water droplets suspended in the atmosphere near the Earth's surface, significantly reducing visibility.

The horizontal transport of any feature within the atmosphere due to the movement of air (wind). This includes phenomena...

Precipitation in the form of small balls or lumps of ice that form in thunderstorm updrafts and fall to the ground.