By Steve Goddard
During May I wrote about a growing discrepancy between HadCrut and GISTEMP.
Dr. Hansen discusses it here. Excerpt and comparison below:
(1) insight into why the GISS analysis yields 2005 as the warmest calendar year, while the HadCRUT analysis has 1998 as the warmest year. The main factor is our inclusion of estimated temperature change for the Arctic region.
HadCrut released their January 1850 through June 2010 temperature data yesterday, and something “interesting” happened. Their temperature anomalies from January-April jumped up from their published values on June 3. May probably also jumped, but unfortunately I didn’t capture a record of it previously.
The chart below shows how the HadCrut data changed between June 3 to July 28.
HadCrut still shows 1998 hotter than 2010 so far, but they seem to be working on “correcting” that problem.
Why is it that post facto adjustments always seem to be upwards in later years, and downwards in earlier years? This whole global temperature business looks like a complete joke to me.
Addedum: source HadCRUT data by date:
The current data is available here.
All three were obtained from the same link on different dates