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Kenneth S. Schmitz, in Physical Chemistry, 2018. 3-9.7 The Thermosphere. The thermosphere extends from the top of the mesopause region (85 km, 53 miles) up to the thermopause region (500–1000 km, 310–620 miles, 1,600,000–3,300,000 feet). The thermosphere is so called because of the photochemical activity caused by the ultraviolet ...
The thermosphere contains an appreciable concentration of elemental sodium located in a 10-kilometre (6.2 mi) thick band that occurs at the edge of the mesosphere, 80 to 100 kilometres (50 to 62 mi) above Earth's surface. The sodium has an average concentration of 400,000 atoms per cubic centimeter.
22 kwi 2021 · Definition. The region of an atmosphere called the thermosphere is characterized by an increase in neutral temperature as a function of altitude and asymptotes to a relatively constant temperature. The corresponding neutral atmospheric density is decreasing with altitude.
The thermosphere is the atmospheric region from ∼85 to ∼500 km altitude, containing the ionosphere. It is characterized by high temperature and large variability, in response to changes in solar ultraviolet radiation and solar-driven geomagnetic activity.
The thermosphere is that rarefied portion of a planetary atmosphere which extends from the top of the middle atmosphere (mesosphere) to the beginning of outer space (exosphere; Figure T15).
The thermosphere is a layer of the Earth's atmosphere that extends from 100 km to around 1000 km. It is characterized by high atmospheric temperature and is influenced by variations in solar extreme ultraviolet radiation and geomagnetic activity.
Thermosphere and Ionosphere Definitions. Thermosphere: neutrals. Layers are divided based on temperature gradient. Starting from the coldest region at mesopause to several hundred km. Ionosphere: plasma. Layers are divided based on plasma density. Starting from about 80 km to several hundred km. Thermosphere and Ionosphere Density Profiles.
