Superb Noctilucent Clouds

Reposted from The Cliff Mass Climate Weblog

Saturday, June 20, 2020

Superb Noctilucent Clouds

One of the crucial extraordinary and delightful sights this time of 12 months are the fragile noctilucent clouds that may seem after sundown and earlier than dawn.

Check out a video made by Greg Johnson of Skunk Bay climate exhibiting the celestial present yesterday morning:

Noctilucent clouds are the best seen clouds, positioned round 50 miles above the earth floor. Such clouds kind when moisture is deposited on mud within the higher environment, typically from meteoritic mud. Main volcanic ejections can even provide the small particles.

These cloud kind within the layer of the environment known as the mesophere, the place the temperatures are the coldest within the environment. Particularly, we’re speaking about temperatures beneath roughly -185F. Midsummer is favored as a result of paradoxically that’s when the mesosphere is coldest.

NASA even has a satellite tv for pc (AIM) devoted to seeing these clouds, as illustrated by an instance from June 13th beneath:

The primary report of noctilucent clouds was in 1885 and a lot of research counsel that such clouds are getting extra frequent.  

Human’s might properly have contributed to this enhance.  However how?  

It seems that rising human emission of methane (CH4) into the environment (see beneath) often is the main trigger, with methane breaking down within the higher environment into a number of parts, together with water vapor.  Extra water vapor results in enhanced ice cloud formation in higher environment.

One other instance of the profound results of human actions on the surroundings.

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June 20, 2020 in Climate. Tags: Noctilucent cloud

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