NASA finds boundary between Earth’s ionosphere and space is shrinking

Interesting…is it Co2? 😉

Michele also dropped this NASA report from 2009 in the comments:
https://www.nasa.gov/topics/earth/features/coolingthermosphere.html

Tallbloke's Talkshop

Communication and Navigation Outage Forecast System (C/NOFS) [credit: NASA] Communication and Navigation Outage Forecast System (C/NOFS) [credit: NASA]
NASA instrumentation shows ‘the quietest solar minimum since the space age began’, as phys.org reports.

Observations made by NASA instruments onboard an Air Force satellite have shown that the boundary between the Earth’s upper atmosphere and space has moved to extraordinarily low altitudes.

These observations were made by the Coupled Ion Neutral Dynamics Investigation (CINDI) instrument suite, which was launched aboard the U.S. Air Force’s Communication/Navigation Outage Forecast System (C/NOFS) satellite on April 16, 2008.

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