The existence of the Ferrel cell is disputed in https://www.mdpi.com/2073-4433/12/11/1439 and https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1002/cjg2.686#:~:text=The%20Ferrel%20cell%20is%20a,components%20of%20large%2D%20scale%20airflows.