Ionosphere
The ionosphere, or upper atmosphere, was one of the highest zones of a planet's atmosphere, so named because the gas molecules were ionized by solar radiation.

In 1996, Henry Starling entered Earth's upper ionosphere in the timeship Aeon. ()

In 2367, Lieutenant Paul Hickman's Type 7 shuttlecraft exploded in the lower ionosphere of Tarchannen III when he tried to land the shuttle on the planet surface. ()

Not long after, a shuttlecraft containing William T. Riker and Ambassador Odan was fired upon as it prepared to enter the upper ionosphere of Peliar Zel. ()

In 2368, the Tamarians created a particle scattering field over El-Adrel IV's ionosphere, so the  would not be able to beam up Jean-Luc Picard. ()

In 2371, the Enterprise-D was unable to scan the surface of Veridian III to locate Captain Jean-Luc Picard with its sensors as the planet's ionosphere created too much interference. ()

The ionosphere of the Drayans' crysata moon contains high levels of electrodynamic turbulence, which caused a Type 6 shuttlecraft from the  to crash in 2372. ()

In 2375, Captain Kathryn Janeway ordered Voyager into a high orbit above a class 6 gas giant to avoid ionospheric turbulence. ()

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Meteorology