Ozone Northern Hemisphere dance

Image processed to show land outlines and grid

Northern hemisphere ozone receives little attention.

Fairly recently a partial view of the north has become available, still incomplete, model output, nevertheless this might be eye opening.

The images used here are from NASA [1]  are tilted partial northern hemisphere. Image left  here is making the geography clear, barely makes the Mediterranean, southern US or Japan.

Fingers of ozone reaching far south has been known for a long time, pre-dates satellites, is rarely mentioned.

Satellite sensing is restricted by how it has to be done: the only proper way is by transmission through the atmosphere, which means from the ground. Reason: measurement uses the difference in absorption between a pair of spectral lines where a light source shining through, daytime the sun, night-time reflected sunlight, the moon, hence remote sensing has no data night side.

(see https://daedalearth.wordpress.com/2013/07/13/stratospheric-ozone-dobson-history-at-oxford/)