It looks like an interesting study, and it relates to last month's blog post on the discrepancy between observed and modeled Pacific sea surface temperature trends. As that post notes, it's critical to understand the source of the mismatch models and observations (natural variability or model error or both?), and I have seen that there are a few studies that point to processes around Antarctica that could be contributing. All I can say is that I don't have any reason to rule it out as a contributor, and I think this idea will be explored more in the years ahead.