Atmosphere collapsing, rebounding?
http://www.abc.net.au/science/articles/ ... 955888.htm
The collapse occurred in a region known as the thermosphere, a rarefied layer of the planet's upper atmosphere between 90 and 600 kilometres above the surface, which shields us from the Sun's far and extreme ultra violet (EUV) radiation.
http://www.news.com.au/technology/scien ... 562#.vatnq
https://www.seeker.com/earths-shrinking ... 91731.html