We're posting this early because Yahoo has it as a featured story, and it keeps getting posted as a blog though is a wobble related feature and should be posted on the new pinned Wobble discussion. Was asked on the Q&A and now here early ..
Is this amazing cloud formation due to the Earth wobble or is it just a natural occurrence as described in the article?
[and from another]
Experts say the clouds were pristine examples of "Kelvin-Helmholtz waves." Whether seen in the sky or in the ocean, this type of turbulence always forms when a fast-moving layer of fluid slides on top of a slower, thicker layer, dragging its surface.
[and from another]
One example is wind blowing over a water surface, where the wind causes the relative motion between the stratified layers (i.e., water and air). The instability will manifest itself in the form of waves being generated on the water surface.
It matters not whether physics has a term for a cloud formation, or whether this occurs in nature in other fluid mediums. The question is, why NOW? As with other phenomena appearing during only the last few years – Moon halos, Sun halos, neon clouds, red dust sprinkled on the snow, monstrously large spider webs, flocks of birds dropping from the skies, unexplained rogue waves, or signing reservoirs – why NOW and not before?
Of course this is wobble related. The technical Kelvin-Helmholtz
description includes different speeds and different density. Where natural where wind and water meet, air usually mixes more readily. The dramatic wave clouds require a layer of air more viscid, thick, which a radically lower temperature in the air would achieve. Higher humidity in the lower air layer would likewise be required, to form clouds when suddenly cooled. Likewise, the air layer moving over the top would need to be PUSHED quickly, which the wobble achieves. Air tends to move with the land, so the lower level clung to the land, while the upper level had velosity and was free to move.