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SESK: Stuff Everyone Should Know · sesk.info/aero-tropopause-lid

What is the tropopause?

The boundary at the top of the troposphere that traps weather below it.

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  1. The bottom layer of the atmosphere
  2. A type of thunderstorm cloud
  3. The boundary on top of the troposphere ✔

Why: The tropopause sits like a lid on top of the troposphere and keeps moisture and weather below it. Its height changes with latitude and season.

Huh, didn't know that: Pilots care about it because the jet stream and bumpy clear air turbulence are often found near it.

The dad joke
Why did the tropopause stop the storm? Because it put a lid on it.
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References

Answer: The boundary on top of the troposphere. The tropopause sits like a lid on top of the troposphere and keeps moisture and weather below it. Its height changes with latitude and season.

  1. FAA Pilot's Handbook of Aeronautical Knowledge (FAA-H-8083-25C), Chapter 12 Weather Theory www.faa.gov/regulations_policies/handbooks_manuals/aviation/faa-h-8083-25c.pdf
    At the top of the troposphere is a boundary known as the tropopause, which traps moisture and the associated weather in the troposphere.
    Checked 2026-10-10.

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