Zonal Wave 3 Pattern in the Southern Hemisphere generated by tropical convection
Channel: Martin Jucker
Date: 2021-08-26

As found by Goyal et al (2021, link below), tropical convection is essential to explain some of the most prominent features in the circulation of the southern hemisphere. 
This animation contains real research data, and shows how tropical convection excites atmospheric (Rossby) waves. These waves are then trapped inside the wind structure in the southern hemisphere (purple surface) and propagate in a zig-zag fashion around the globe. This is very similar to the workings of optical cables which trap laser light and guide it efficiently from one place to the other.

Also see this video about the same paper: https://youtu.be/3rZNfHkHfjk

The paper: Goyal et al (2021), "Zonal Wave 3 Pattern in the Southern Hemisphere generated by tropical convection", Nature Geoscience, DOI: 10.1038/s41561-021-00811-3, https://www.nature.com/articles/s41561-021-00811-3

Music: bensound.com