I believe the deep-ocean vents you mention are beside the point. The article is discussing the upwelling of cold, CO2-rich water in the Southern Ocean - not emissions from vents.
Also, it’s worth noting that the PNAS article does not mention CO2 per se, only upwelling. The article summary of the press release does draw the CO2 connection.
Besides the connections you mention, the PNAS article points out that this result illustrates that current models of ice/ocean interaction are not producing these observational trends.
I believe the deep-ocean vents you mention are beside the point. The article is discussing the upwelling of cold, CO2-rich water in the Southern Ocean - not emissions from vents.
Also, it’s worth noting that the PNAS article does not mention CO2 per se, only upwelling. The article summary of the press release does draw the CO2 connection.
Besides the connections you mention, the PNAS article points out that this result illustrates that current models of ice/ocean interaction are not producing these observational trends.