The stratosphere is the second layer of a planet's atmosphere, just above the troposphere. Traveling through the stratosphere in a starship was oftentimes turbulent. (VOY: "Friendship One")

Barystatic filters, such as those used on the planet Tagra IV, cleaned a planet's air by shooting negative ions into the stratosphere. (TNG: "True Q")

In 2370, when Boraal II was undergoing atmospheric dissipation due to intense plasmonic reactions, the planet's stratosphere was in the process of breaking down when the USS Enterprise-D arrived in response to a distress call. (TNG: "Homeward")

One of the desert regions of a Nezu colony was noted to have substantial cratering, atmospheric shock waves, and large concentrations of dust and other stratospheric contaminants. (VOY: "Rise")

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