HadSST is generally regarded as the best of the global SST data sets, and so the temperature story here comes from that source, the latest version being HadSST3.
The chart below shows SST monthly anomalies as reported in HadSST3 starting in 2015 through November 2017.
After a steep drop in September, October temps bumped upward in response. The rise was led by anomaly increases of about 0.06 in both the Tropics and SH, compared to drops of about 0.20 the previous month. NH was virtually the same as September. Global average anomaly changed as much as the Tropics and SH, but remained lower than the three previous Octobers.
Now in November, the downward trend has resumed. As will be shown in the analysis below, 0.4C has been the average global anomaly since 1995.
A longer view of SSTs
The graph below is noisy, but the density is needed to see…
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