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General Astronomy >> Light Pollution

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George N
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Reged: 05/19/06

Loc: Binghamton & Indian Lake NY
Waves in airglow
      #5614724 - 01/09/13 11:52 PM

See: NASA Earth Observatory web page

I had heard claims that there can be changes in airglow, but here it is captured in a satellite image from April 2012. The researchers were surprised that the satellite is sensitive enough to record air glow!


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GlennLeDrew
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Reged: 06/18/08

Loc: Ottawa, Ontario, Canada
Re: Waves in airglow new [Re: George N]
      #5634380 - 01/21/13 06:24 AM

These bands often enough show up in wide angle night sky images.

On the linked-to web page, it was stated that the large thunderstorm was responsible for the banding, or ripples. I do wonder about this. At 90 kilometers, the airglow layer is very well above the tropopause, at about 11 kilometers. Thunderstorm tops do not intrude very far above the tropopause, and so an additional ~80 kilometers is a lot of (thin!) atmosphere to absorb/dampen any induced gravity waves as stratospheric air is forced upward by the intruding T-storm top.

But I'm certainly amenable to revising my 'analysis'.


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