Issue #1: How do we implement the alpha model within the barotropic/baroclinic splitting of POP?
The POP-alpha model
level 1
level 2
level 3

level K
level 1
level 2
level 3

level K
barotropic part
¥ single layer
¥ implicit time step
baroclinic part
¥ multiple levels
¥ explicit time step
¥ vertical mean = 0
vertically integrated
fast surface gravity waves
slower internal gravity waves
full ocean
(vertical section)