Orbital decay rates of satellites and other objects that have flown continually for more than 30 years were analyzed to determine the concentrations of greenhouse gases in the thermosphere. A decrease of 25 percent per decade was found in the thermosphere's density since 1966. Implications are discussed.
Subject: Environmental Science:Global Change and Climate:Climate Change:Greenhouse effect, Geoscience:Atmospheric Science:Climate Change, Climate Change:Greenhouse effect Resource Type: Scientific Resources:Overview/Reference Work:AGU Highlights Theme: Teach the Earth:Course Topics:Environmental Science, Teach the Earth:Incorporating Societal Issues:Climate Change, Teach the Earth:Course Topics:Atmospheric Science
