Dark blue cloudy sky

What is Kelvin Helmholtz?

Perhaps you have come across them, maybe you are seeing them for the first time. These clouds, known as wave clouds, resemble ocean waves rolling at equal intervals and are one of the rare types. It is believed that these clouds with their mesmerizing appearance inspired the swirls we see in Vincent Van Gogh's painting "Starry Night." So, how does this type of cloud form? They arise when two different layers of air in our atmosphere move at different speeds and occur when there is a strong vertical shear between the two air currents, causing the winds to blow faster at upper levels than at lower levels.

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Glossary

Cloud or rain droplets containing pollutants, such as oxides of sulfur and nitrogen, to make them acidic.

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

An instrument that continuously records atmospheric pressure over time. It uses a barometer to measure pressure and creates...

A type of cloud consisting mostly of small particles such as ice particles.

A prefix used in cloud nomenclature to describe middle-altitude clouds that form between 6,500 and 20,000 feet, such as altostratus...

A fixed potential temperature line on adiabats, or the process of thermodynamic changes within a system without any exchange...

The formation of ice crystals on surfaces when the temperature drops below freezing, typically overnight, causing potential...

The expected rate of temperature decrease in an adiabatically rising air parcel when there is no heat exchange with the environment....

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

A bomb cyclone is a large mid-latitude storm that forms when a storm’s central pressure drops (i.e. “bombs out”), resulting...