>The Recent Drop In The Sea Surface Temperatures Of U.S. Coastal Waters

>This post illustrates the recent drop in the SST anomalies of the U.S. coastal waters. We’ll represent this subset with the coordinates of 20N-50N, 130W-65W. I’ve used those coordinates in at least one earlier post about the SST Anomalies of U.S. “Coastal” Waters. Figure 1 is the December 2010 Reynolds OI.v2 SST anomaly map with those coordinates highlighted. The cooling appears to be an exaggerated response to the 2010/11 La Niña.
Figure 1

Figure 2 is the Reynolds OI.v2-based time-series graph for this subset. After the two-month flattening in September and October 2010, at approximately -0.24 deg C, the SST anomalies dropped more than 0.65 deg C by January 2011. The January 2011 reading for the U.S. Coast Waters is the lowest on record for the satellite-based Reynolds Oi.v2 SST dataset.
Figure 2

Note: This is not a post about global sea surface temperature (SST) anomalies, nor is it a post about the SST anomalies of the individual ocean basins. For those refer to the January 2011 SST Anomaly Update.

Figures 3, 4, and 5 show the long-term SST anomalies for the U.S. Coastal Waters using the HADISST, ERSST.v3b, and HADSST2 datasets. They provide a different perspective on the magnitude of the recent drop. For the HADISST and ERSST.v3b datasets, one has to go back to the April 1971 to find similar SST anomalies, and back to July 1933 with HADSST2 data.
Figure 3
Figure 4
Figure 5

The weekly data for this subset, Figure 6, show that the SST anomalies are rebounding. I’ll add this dataset to the monthly update for a few months to assure it rebounds fully.
Figure 6


The map and all data presented in this post are available through the KNMI Climate Explorer:http://climexp.knmi.nl/selectfield_obs.cgi?someone@somewhere

About Bob Tisdale

Research interest: the long-term aftereffects of El Niño and La Nina events on global sea surface temperature and ocean heat content. Author of the ebook Who Turned on the Heat? and regular contributor at WattsUpWithThat.
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4 Responses to >The Recent Drop In The Sea Surface Temperatures Of U.S. Coastal Waters

  1. Anonymous says:

    >Any changes of note in gulf stream temperatures?

  2. Bob Tisdale says:

    >Anonymous: The SST anomalies off the east coast of the U.S. are cool but they aren't setting new records for the Reynolds OI.v2 SST data. That is, since 1982, there have been other minimums that were comparable.

  3. K. Pelman says:

    >Keep in mind that the new 1981-2010 climatologies are now being used for the January 2011 data.

  4. Bob Tisdale says:

    >K. Pelman: Are you referring to the new climatology used by UAH for its TLT data? It does not apply the SST data downloaded from the KNMI Climate Explorer, or to SST data downloaded from the NOAA NOMADS website.Regards

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