Science glossary film: Troposphere

Troposphere

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The lower and most dense part of the atmosphere, extending to an altitude of about 20km at the equator and 11km at the poles.

The lower and densest part of the atmosphere, extending to an altitude of about 20km at the equator and 11km at the poles. It contains 75% of the atmosphere by mass, and 97% of its water vapour. All of the phenomena that we perceive as weather occur in the troposphere. Pressure and temperature both drop with altitude.

It contains 75% of the atmosphere by mass, and 97% of its water vapour. All of the phenomena that we perceive as weather occur in the troposphere. Pressure and temperature both drop with altitude.

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