troposphere

troposphere
—tropospheric /trop'euh sfer"ik, -sfear"-, troh'peuh-/, adj.
/trop"euh sfear', troh"peuh-/, n. Meteorol.
the lowest layer of the atmosphere, 6 mi. (10 km) high in some areas and as much as 12 mi. (20 km) high in others, within which there is a steady drop in temperature with increasing altitude and within which nearly all cloud formations occur and weather conditions manifest themselves.
[1905-10; TROPO- + SPHERE]

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Lowest region of the atmosphere, bounded by the Earth below and the stratosphere above, with the upper boundary being about 6–8 mi (10–13 km) above the Earth's surface.

The troposphere is marked by decreasing temperature with height, which distinguishes it from the stratosphere. Most clouds and weather systems occur in the troposphere.

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▪ atmospheric region
      lowest region of the atmosphere, bounded by the Earth beneath and the stratosphere above, with its upper boundary being the tropopause, about 10–18 km (6–11 miles) above the Earth's surface. The troposphere is characterized by decreasing temperature with height and is distinguished from the overlying stratosphere by a region of nearly constant temperature in the lower stratosphere. Most of the clouds and weather systems are contained within the troposphere.

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Universalium. 2010.

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