Watts Up With That?

Here's a story of scientific investigation and discovery I'm proud to have had a small part in.

Regular readers may remember that I posted about a climate station in Detroit Lakes MN last week, surveyed by volunteer Don Kostuch, and cross posted it to the website http://www.climateaudit.org/?p=1828#comments that had two air conditioner units right next to it. It looked like an obvious cause and effect because in 1999 on May 5th, it was determined that the a/c units were moved off the roof of the radio station where this station resides and moved them to the ground where the temperature sensor is close by.

However, some folks on the blogosphere just went, well, a little ballistic over that assertion. It was a good thing too, because their very loud and somewhat uncivil complaints led to an examination of this idea: if its not the a/c units, what then did cause the temperature jump at that time?

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..

Here is one of his first posts where he begins to understand what is happening. "This imparts an upward discontinuity of a deg C in wintertime and 0.8 deg C annually. I checked the monthly data and determined that the discontinuity occurred on January 2000 - and, to that extent, appears to be a Y2K problem. I presume that this is a programming error."

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.

for full article go to: http://www.norcalblogs.com/watts/2007/08/1998_no_longer_the_hottest_yea.