We have our answer! Reportedly there was a Y2K glitch which changed the temperature measurements thusly:
"NASA has now silently released corrected figures, and the changes are truly astounding. The warmest year on record is now 1934. 1998 (long trumpeted by the media as record-breaking) moves to second place. 1921 takes third. In fact, 5 of the 10 warmest years on record now all occur before World War II. Anthony Watts has put the new data in chart form, along with a more detailed summary of the events."
http://www.dailytech.com/Blogger+finds+Y2K+bug+in+NASA+Climate+Data/article8383.htm
The fatal flaw - these are not global temperature measurements, but US temperature measurements (and just the lower 48 at that):
"Contiguous 48 U.S. Surface Air Temperature Anomaly"
http://data.giss.nasa.gov/gistemp/graphs/Fig.D.txt
So there you have it, 1934 was not nearly as warm as recent years globally:
http://www.cru.uea.ac.uk/cru/info/warming/
But it was hot in the USA.
2007-08-10
07:54:52
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13 answers
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Dana1981
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Global Warming