Since NASA’s James Hansen finally released computer codes related to how climate data are collected and adjusted, anthropogenic global warming skeptics around the world have been waiting to see what a scientific examination of this information would produce.
On Monday, Canada’s Steve McIntyre, who himself debunked Michael Mann’s ridiculous “Hockey Stick” theory as well as identified Hansen’s Y2K bug, released information identifying that Hansen recently made additional changes to climate data akin to how companies like Enron used creative accounting to exaggerate earnings and defraud investors.
As published at Climate Audit moments ago (emphasis added, h/t Anthony Watts):
Shortly after, NASA published their source code on Sept 7, we started noticing puzzling discrepancies in the new data set. […]
On Sept 15, Jerry Brennan observed that the NASA U.S. temperature history had changed and that 1998 was now co-leader atop the U.S. leaderboard.
By this time, we’d figured out exactly what Hansen had done: they’d switched from using the SHAP version – which had been what they’d used for the past decade or so – to the FILNET version. The impact at Detroit Lakes was relatively large – which was why we’d noticed it, but in the network as a whole the impact of the change was to increase the trend slightly – enough obviously to make a difference between 1934 and 1998 – even though this supposedly was of no interest to anyone.
In very simplistic terms, SHAP and FILNET are computer programs used by climatologists to assist in the collation and interpretation of climate data. Each program does so differently, and, therefore, yields different final results.
As such, by suddenly switching from SHAP – which NASA had been using for decades – to FILNET, NASA was able to once again claim that 1998 and 1934 are now tied for the warmest years on record in the U.S. This despite Hansen’s claim in August that climate record changes precipitated by McIntyre’s Y2K bug find were irrelevant.
As McIntyre pointed out, what’s now happening at NASA is akin to companies changing from Generally Accepting Accounting Principles (GAAP) to what produced a lot of faulty earnings in the late ’90s and early ’00s, Earnings Before Interest, Taxes, Depreciation and Amortization (EBITDA):
Read the rest of the blog post here http://newsbusters.org/blogs/noel-sheppard/2007/09/17/nasa-s-hansen-playing-enron-accounting-games-climate-data