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Thermosphere Contraction Puzzles Scientists

The thermosphere layer of earth's atmosphere begins 80 to 90 kilometers above the surface and extends several hundred kilometers into the sky; it is the home to numerous satellites and the International Space Station. It is known that the thermosphere occasionally cools and contracts, but a recent study of satellite orbital decay (due to light atmospheric drag) found that the contraction during 2008 and 2009 was significantly more severe than expected, leaving researchers at a loss for how to explain it. From Space.com: "This type of collapse is not rare, but its magnitude shocked scientists. 'This is the biggest contraction of the thermosphere in at least 43 years,' said John Emmert of the Naval Research Lab, lead author of a paper announcing the finding in the June 19 issue of the journal Geophysical Research Letters. 'It's a Space Age record.' The collapse occurred during a period of relative solar inactivity — called a solar minimum from 2008 to 2009. These minimums are known to cool and contract the thermosphere, however, the recent collapse was two to three times greater than low solar activity could explain."

3 of 200 comments (clear)

  1. Re:Great by Svartalf · · Score: 0, Flamebait

    Yeah, you caught that too... Greenhouse Gas or Coolant- which is it guys?

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    I am not merely a "consumer" or a "taxpayer". I am a Citizen of the State of Texas
  2. Re:Very easy to explain.. by Mashiki · · Score: 0, Flamebait

    Funny that. Last time I looked there was a difference between pollution and climate science. But it seems to be the rage now that breathing causes global warming. In other news, the latest "OMG!!!!eleventy11 hottest temperature on record month" is actually 0.42 vs the 1.48 when you're not cherry picking your data.

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  3. Obama Effect by WhiteHorse-The+Origi · · Score: 0, Flamebait

    All the republican hot air for nearly a decade suddenly halted when Obama took office. This created an entropy vaccuum and hence the thermosphere cooled in order to fill the vaccuum.