air mass

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Explore what happens when cold and warm air masses collide

source regions of world's principal air masses

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air mass summary

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Close up of books. Stack of books, pile of books, literature, reading. Homepage 2010, arts and entertainment, history and society

12 Novels Considered the “Greatest Book Ever Written”

Aspirin pills.

7 Drugs that Changed the World

Drinking water is poured into a glass.

Water Fluoridation: Just the Facts

Illustration for Demystified "How Dangerous is Quicksand"

How Deadly Is Quicksand?

Shadow of a man holding large knife in his hand inside of some dark, spooky buiding

7 of History's Most Notorious Serial Killers

Portrait of a mountain gorilla at a short distance. gorilla close up portrait.The mountain gorilla (Gorilla beringei beringei)

Falling Stars: 10 of the Most Famous Endangered Species

King Cobra snake in Malaysia. (reptile)

9 of the World’s Deadliest Snakes

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source regions of world's principal air masses

Explore what happens when cold and warm air masses collide

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Topics

front tropical air mass Arctic air mass equatorial air mass polar Pacific air mass maritime air mass continental air mass polar air mass warm front occluded front atmospheric pressure weather forecasting weather modification fog cloud frost dew precipitation temperature inversion humidity

Dig Deeper: More Articles That Discuss This Topic

China: The air masses

Key People

Vilhelm Bjerknes

Norwegian meteorologist

Tor Harold Percival Bergeron

Scandinavian meteorologist

Quiz

rain. Child in the rain, wearing a rain coat, under a yellow umbrella. April Showers weather climate rain storm water drops

April Showers to March’s Lions and Lambs

Lightning over a farm field. Weather electricity thunderstorm light energy tree

Facts You Should Know: Weather Quiz

rain. Child in the rain, wearing a rain coat, under a yellow umbrella. April Showers weather climate rain storm water drops

April Showers to March’s Lions and Lambs

Umbrella colored like a rainbow sticking out above a sea of black umbrellas while it rains. (storm, weather)

Weather Words Vocabulary Quiz

Iceland, Glacier lagoon (Jokulsarlon)

Winter Weather Words Quiz