Questions tagged [upper-atmosphere]

The upper-atmosphere is the part of earth's atmosphere that is above the homosphere (where all gases are well mixed) and starts at approximatly 100km. When asking questions specifically about the upper-atmosphere, use this tag and also include the [atmosphere] tag and [meteorology] tag if appropriate.

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5
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1answer
82 views

What is the characteristical time of the loss of the Earth atmosphere, how can it be calculated?

Somewhere I've read it is in the order of some tens of billions of years, but unfortunately I can't find any reference with it in Google. I suspect, the losses are coming mainly from analyzing the ...
10
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1answer
176 views

Noctilucent clouds and anthropogenic climate change

In reading about observing noctilucent clouds, several articles about this phenomena, such as Science Daily's Spectacular 'Night-shining' Clouds Could Be A Harbinger Of Climate Change, suggest that ...
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3answers
800 views

Why are atmospheric BrO and ClO important to measure by satellite?

The announcement Arianespace orbits two satellites – JCSAT-17 and GEO-KOMPSAT-2B – to support connectivity and environmental monitoring in Asia mentions GEO-KOMPSAT-2B which hosts the Geostationary ...
8
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3answers
6k views

ppmV versus μmol/mol for atmospheric CO2 - how to convert?

For a uniform mixture of ideal gases, I think that the concentration of a gas reported in parts per million by volume (ppmV) and micro-moles per mole (μmol/mol) would be the same. When I see ...
4
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3answers
92 views

Are atmospheric halogen oxides “supposed to be” in the atmosphere? Where do they come from?

I like to naively think of Earth's natural atmosphere as nitrogen, oxygen, argon, water, carbon dioxide and okay, some nitrogen and sulfur oxides, and again okay, a little hydrogen and methane from ...
3
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1answer
76 views

How would this experiment's different particle types produce atmospheric reflectivity?

The MIT Technology Review news item Harvard Scientists Moving Ahead on Plans for Atmospheric Geoengineering Experiments discusses a proposed experiment to study in a carefully controlled way the ...