Thermosphere
Thermosphere
Thermosphere (pronunciation: /ˈθɜːrməˌsfɪər/) is a layer of the Earth's atmosphere that is located above the Mesosphere and below the Exosphere. The term "thermosphere" comes from the Greek words "therme" meaning heat and "sphaira" meaning sphere, as the temperature in this layer can reach up to 2,500°C (4,530°F).
Description
The Thermosphere is characterized by an increase in temperature with height due to the absorption of highly energetic solar radiation. Temperatures in the thermosphere can range from about 500°C (932°F) to 2,000°C (3,632°F) or higher. The exact temperature can vary greatly due to changes in solar activity.
Components
The Thermosphere contains the Ionosphere, a region populated by ions and free electrons. This layer is important for radio communication as it reflects radio waves back to the Earth's surface. It is also where the Northern Lights and Southern Lights occur.
Related Terms
See Also
External links
- Medical encyclopedia article on Thermosphere
- Wikipedia's article - Thermosphere
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