The Night Marine Air Temperature dataset HadNMAT2 from the UKMO is used for bias adjustments of the new NOAA ERSST.v4 “pause-buster” sea surface temperature data over nearly its full term, from 1875 to 2010. But the UKMO HadNMAT2 data are not available online so that the public can easily verify the NOAA ERSST.v4 results. That’s small fish compared to an even bigger problem for NOAA. A preliminary investigation of the UKMO dataset suggests that the HadNMAT2 data do not support NOAA’s claims of no slowdown in global surface warming. In other words, the HadNMAT2 data have a much lower warming rate than the new NOAA “pause buster” ERSST.v4 data since 1998.
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