Troposphere
Troposphere
The Troposphere (pronounced: /ˈtroʊpəˌsfɪər/) is the lowest layer of the Earth's atmosphere, where weather phenomena occur. The term is derived from the Greek words "tropos" meaning change and "sphaira" meaning sphere, referring to the constant changes in weather that occur in this layer.
Definition
The Troposphere extends from the Earth's surface up to a height of about 8 to 15 kilometers, depending on the geographical location and the season. It contains approximately 75% of the atmosphere's mass and 99% of its water vapor. This layer is characterized by a decrease in temperature with height, a phenomenon known as the lapse rate.
Characteristics
The Troposphere is distinguished by the presence of weather phenomena, such as clouds, rain, snow, and wind, which are driven by the heat energy from the sun. It is also the layer where most greenhouse gases are found, which trap heat and contribute to the global warming.
Related Terms
- Stratosphere: The layer of the atmosphere immediately above the Troposphere.
- Mesosphere: The third layer of the atmosphere, located above the Stratosphere.
- Thermosphere: The fourth layer of the atmosphere, located above the Mesosphere.
- Exosphere: The outermost layer of the Earth's atmosphere, located above the Thermosphere.
- Ozone Layer: A region of the Stratosphere containing a high concentration of ozone molecules.
- Jet Stream: A narrow band of strong winds in the upper Troposphere.
External links
- Medical encyclopedia article on Troposphere
- Wikipedia's article - Troposphere
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