The record high for global average sea surface temperature (SST) is about 0.2°C.
The orange line is 2022.
Same for the North Atlantic:
Plots from University of Maine's Climate Reanalyzer.
Here's an interesting article from today that goes into more detail:
Earth in hot water? Worries over sudden ocean warming spike, Seth Borenstein, Associated Press, 4-27-23
The last three La Nina years have depressed temperatures below the long term trend.
Now we are starting to see the reversion to the trend.
Wonder what means for the coming El Nino. Large, or suppressed by all the La Nina cooling?
Probably a large El Nino. Three years of La Nino will have stored a lot of heat below the surface. When it comes out again surface and atmosphere temperatures will jump. Another step up the escalator.
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