I located https://www.epa.gov/climate-indicators/climate-change-indicators-sea-surface-temperature https://www.epa.gov/climate-indicators/climate-change-indica.

I located https://www.epa.gov/climate-indicators/climate-change-indicators-sea-surface-temperature https://www.epa.gov/climate-indicators/climate-change-indica... Especially Figure 2 on that page, a map showing the change in Sea Surface Temperature, was interesting. Do you have more information on what changed around 1945? (I mean, I could probably guess. I was wondering if you're looking at different sources than I am.)