The top of the stratosphere is cooling and shrinking due to less heat coming up from below. The recent Solar Maximum was touted as a way to reduce space junk in low earth orbit, however, that was a bust Old article talking about what they would hope would happen.

The shrinking stratosphere is one of the data points in the global warming debate that the contrary side usually does not have an answer to. Mention it next time you are in a debate and watch the brain gears mesh.