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https://spaceweatherarchive.com/2022/03/23/the-thermosphere-is-warming-up/
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Almost 40 Starlink satellites fell out of the sky earlier this year as a result of aerodynamic drag up there....
F
Fred Bloggs
Guest
On Monday, September 12, 2022 at 3:58:14 PM UTC-4, a a wrote:
> https://spaceweatherarchive.com/2022/03/23/the-thermosphere-is-warming-up/
What explains the increasing density of nitrogen with altitude when everything else is thinning out?
Satellites were only recently launched and still far from their final orbit. The satellites in stable orbit were unaffected.
> https://spaceweatherarchive.com/2022/03/23/the-thermosphere-is-warming-up/
What explains the increasing density of nitrogen with altitude when everything else is thinning out?
Satellites were only recently launched and still far from their final orbit. The satellites in stable orbit were unaffected.
J
Jeff Layman
Guest
On 12/09/2022 22:41, Fred Bloggs wrote:
Perhaps the relative densities of nitrogen and oxygen?
According to the wiki on the thermosphere (see in particular
<https://en.wikipedia.org/wiki/Thermosphere#Neutral_gas_constituents>)
\"Above the turbopause, however, diffusive separation of the various
constituents is significant, so that each constituent follows its
barometric height structure with a scale height inversely proportional
to its molecular weight. The lighter constituents atomic oxygen (O),
helium (He), and hydrogen (H) successively dominate above an altitude of
about 200 kilometres (124 mi) and vary with geographic location, time,
and solar activity. The ratio N2/O which is a measure of the electron
density at the ionospheric F region is highly affected by these
variations.[2] These changes follow from the diffusion of the minor
constituents through the major gas component during dynamic processes.\"
--
Jeff
On Monday, September 12, 2022 at 3:58:14 PM UTC-4, a a wrote:
https://spaceweatherarchive.com/2022/03/23/the-thermosphere-is-warming-up/
What explains the increasing density of nitrogen with altitude when everything else is thinning out?
Perhaps the relative densities of nitrogen and oxygen?
According to the wiki on the thermosphere (see in particular
<https://en.wikipedia.org/wiki/Thermosphere#Neutral_gas_constituents>)
\"Above the turbopause, however, diffusive separation of the various
constituents is significant, so that each constituent follows its
barometric height structure with a scale height inversely proportional
to its molecular weight. The lighter constituents atomic oxygen (O),
helium (He), and hydrogen (H) successively dominate above an altitude of
about 200 kilometres (124 mi) and vary with geographic location, time,
and solar activity. The ratio N2/O which is a measure of the electron
density at the ionospheric F region is highly affected by these
variations.[2] These changes follow from the diffusion of the minor
constituents through the major gas component during dynamic processes.\"
--
Jeff