This is a great idea!! I think this project can have a lot of synergy with the project on Water masses of the future, and Plotting ocean variables in density coordinates (using xhistogram).
I am interested in participating in this.
If you are interested we could also try to extend the scope to the other water masses of the Southern Ocean too, as done in studies like
Downes et al 2015 (https://www.sciencedirect.com/science/article/pii/S1463500315001420), Sallee et al 2013 (https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1002/jgrc.20135), and few other references within.