Thursday, August 9, 2007

1998 no longer the hottest year on record in USA


Whats' wrong with this picture? This is an example of how NASA get its data for temperatures.

Steve McIntyre, of Toronto operates www.climateaudit.org and began to investigate the data and the methods used to arrive at the results that were graphed by NASA's Goddard Institute for Space Studies (GISS).

What he discovered was truly amazing. Since NASA does not fully publish the computer source code and formulae used to calculate the trends in the graph, nor the correction used to arrive at the "corrected" data. He had to reverse engineer the process by comparing the raw data and the processed data..

He further refines his argument showing the distribution of the error, and the problems with the USHCN temperature data. He also sends an email to NASA GISS advising of the problem.

He finally publishes it here, stating that NASA made a correction not only on their own web page, attributing the discovery to McIntyre, but NASA also issued a corrected set of temperature anomaly data which you can see here:

http://data.giss.nasa.gov/gistemp/graphs/Fig.D.txt

Steve McIntyre posted this data from NASA's newly published data set from Goddard Institute of Space Studies (GISS) These numbers represent deviation from the mean temperature calculated from temperature measurement stations throughout the USA.

According to the new data published by NASA, 1998 is no longer the hottest year ever. 1934 is.

Four of the top 10 years of US CONUS high temperature deviations are now from the 1930s: 1934, 1931, 1938 and 1939, while only 3 of the top 10 are from the last 10 years (1998, 2006, 1999). Several years (2000, 2002, 2003, 2004) fell well down the leaderboard, behind even 1900. (World rankings of temperature are calculated separately.)

Top 10 GISS U.S. Temperature deviation (deg C) in New Order 8/7/2007
Year Old New
1934 1.23 1.25
1998 1.24 1.23
1921 1.12 1.15
2006 1.23 1.13
1931 1.08 1.08
1999 0.94 0.93
1953 0.91 0.90
1990 0.88 0.87
1938 0.85 0.86
1939 0.84 0.85

Here’s the old order of top 10 yearly temperatures.
Year Old New
1998 1.24 1.23
1934 1.23 1.25
2006 1.23 1.13
1921 1.12 1.15
1931 1.08 1.08
1999 0.94 0.93
1953 0.91 0.90
2001 0.90 0.76
1990 0.88 0.87
1938 0.85 0.86

I salute the work of Steven McIntyre, he has now made two major contributions to climate science.
1) Proving how the Mann "hockey stick" used in all Gore's movie, An Inconvenient Truth, was based on unsupportable data and methods.
2) Proving how yearly temperature anomalies for the USA are based on data that had been processed incorrectly.

Dr. Roger Pielke of the University of Colorado also deserves credit becuase he was the one who encouraged me to pursue the www.surfacestations.org project due to his broad work on land use change and it's affect on regional and local climate.

Now I ask you do you still believe in global warming?

1 comment:

Clyde said...

That is in one area, global means everywhere. Tell Mr. MCintyre to kiss my ass cause its hot!!!!!