Turiel is a physicist and the other two commenters are telecommunication engineers. The paper itself, which I read, states that salinity has increased and previous stratification has been disrupted. And that's where they stop because that's what the data tells them. Then they say that we need to perform more studies to understand what's going on, which is the logical conclusion. There is no mention of "doubling of co2 emissions" or "deep Southern ocean circulation has reversed completely" in the study.