Helical structure of rosettes page

[juergenw]

I think this could be the display of a (special) wind as described by Aristotle in Meteorologica.

Based on the exhalations (dry and wet) a helical wind is described (in the Rosette folio the blue/white waves - I discuss winds and meteorological effects in the Rosette folio in more detail in a different thread You are not allowed to view links. Register or Login to view.)

I attach some extract of a geophysical paper (2003) on that special wind - let me know if you need more details of the full paper.
 
This special type of wind (and images) can be also searched for as 'Australian morning glory wind' - look for the images at the Google search or here at wiki page (You are not allowed to view links. Register or Login to view.)