Termosferde

Termosferde is a Turkish term meaning “in the thermosphere” and is used to refer to phenomena, layers, or objects located within the thermosphere of Earth's atmosphere. The thermosphere is the upper layer of the atmosphere, starting roughly around 80-90 kilometers above the surface and extending upward to between 500 and 1,000 kilometers, though the exact upper boundary varies with solar activity. In this region, the density of atmospheric particles is extremely low, yet solar energy ionizes gases, contributing to the formation of the ionosphere.

Temperatures in the thermosphere rise with altitude and can reach thousands of degrees Celsius; however, because the air is so sparse, heat transfer to a body is minimal, so it would not feel hot in ordinary terms. The region contains ionized particles, including ions such as O+, N2+, and O2+, which influence radio propagation and contribute to auroral displays at high latitudes.

The thermosphere includes subregions such as the lower thermosphere and the upper thermosphere, and overlaps with the ionosphere. It is a key region for satellite orbits, as atmospheric drag is greatly reduced compared with lower layers, though residual drag still affects objects like the International Space Station.

In Turkish science writing, termosferde is widely used to indicate observations, measurements, or events located within this atmospheric layer, or to describe phenomena occurring at thermospheric altitudes.