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New Zealand Climate Data Shows Clear Evidence Of Fraud

Friday 27 November 2009, 9:45AM

By Clare Swinney

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Why do people talk about "global warming" when New Zealand had its coldest October in 64 years?  Not surprisingly, the raw data in New Zealand tells a different story than the “official” one. 

Reposted From TBR.cc

The NIWA climate controversy took a new twist tonight with the release of new data from the government run climate agency.

Reeling from claims that it has massaged data to show a 150 year warming trend where there isn't one, NIWA's chief climate scientist David Wratt, an IPCC vice-chair on the 2007 AR4 report, issued a news release stating adjustments had been made to compensate for changes in sensor locations over the years.

While such an adjustment is valid, it needs to be fully explained so other scientists can test the reasonableness of the adjustment.

Wratt is refusing to release data his organisation claims to have justifying adjustments on other weather stations, meaning the science cannot be reviewed. However, he has released information relating to Wellington temperature readings, and they make for interesting reading.

Here's the rub. Up until 1927, temperatures for Wellington had been taken at Thorndon, only 3 m above sea level and an inner-city suburb. That station closed and, as I suspected in my earlier post, there is no overlap data allowing a comparison between Thorndon and Kelburn, where the gauge moved, at an altitude of 135 metres.

With no overlap of continuous temperature readings from both sites, there is no way to truly know how temperatures should be properly adjusted to compensate for the location shift.

Wratt told Investigate earlier there was international agreement on how to make temperature adjustments, and in the news release tonight he elaborates on that:

"Thus, if one measurement station is closed (or data missing for a period), it is acceptable to replace it with another nearby site provided an adjustment is made to the average temperature difference between the sites."

Except, except, it all hinges on the quality of the reasoning that goes into making that adjustment. If it were me, I would have slung up a temperature station in the disused location again and worked out over a year the average offset between Thorndon and Kelburn. It's not perfect, after all we are talking about a switch in 1928, but it would be something. But NIWA didn't do that.

Instead, as their news release records, they simply guessed that the readings taken at Wellington Airport would be similar to Thorndon, simply because both sites are only a few metres above sea level.

Airport records temps about 0.79C above Kelburn on average, so NIWA simply said to themselves, "that'll do" and made the Airport/Kelburn offset the official offset for Thorndon/Kelburn as well, even though no comparison study of the latter scenario has ever been done.

Here's the raw data, from NIWA tonight, illustrating temp readings at their three Wellington locations since 1900:

For the rest of the article link here.