Inconvenient: oceans continue to cool



From the way media and climate scientists portray the global air temperature this past year, you?d think there was only one place to go up. For example, Gavin is holding on to hope (see Tweet).

Next year will be interesting.

However, oceans rule the temperature of the planet, and as this most recent SST shows, there?s a lot of cool water and a clear signature of La Nioa shaping up off the coast of South America

Ron Clutz of Science Matters writes:

September Sea Surface Temperatures (SSTs) are now available, and we see downward spikes in ocean temps everywhere, led by sharp decreases in the Tropics and SH, reversing the bump upward last month. The Tropical cooling in particular factors into forecasters favoring an unusually late La Nina appearance in coming months.

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 September 2017.

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