Open Letter to Tom Karl of NOAA/NCEI Regarding “Hiatus Busting” Paper

Bob Tisdale - Climate Observations

Date:  June 10, 2015

Subject:  Karl et al. (2015) Possible artifacts of data biases in the recent global surface warming hiatus and the Sea Surface Data that Support It

From:  Bob Tisdale – Independent Researcher

To: Tom Karl – Director NOAA/NCEI

Dear Tom:

I’m writing to you with respect to the recent paper, of which you were lead author.  The paper is, of course, Karl et al. (2015) Possible artifacts of data biases in the recent global surface warming hiatus (paywalled.)  It presented the impacts on the recent slowdown in surface temperature warming of the not-yet-implemented changes to the NOAA/NCEI global land+ocean surface temperature dataset. The changes to the ocean surface portion (the NOAA ERSST.v4 sea surface temperature reconstruction), not the land surface portion, played the larger role in your findings. The changes to that sea surface temperature data are supported by the papers:

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