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Re: Data correction in New Zealand.

Assume that all stations produce constant temperature measurements. A graph of each output is a horizontal line. The effect of moving a station is to create a discontinuity at the time of moving: the result is a step function, with a step equal to the temperature difference. Each movement creates a step up or down at the time of the movement in the appropriate function. If you sum all these functions and average them, you get a step function with small up and down steps at discontinuities. Unless there is something weird going on, these steps mostly cancel each other out. Subtract this averaged step function from the provided graph and you have the corrected result. It won't be visually much different from what you see.

Inspection of the two graphs shows the introduction of a line or other curve with a positive slope of about 20 degrees. That cannot possibly be the step function; it is something else. The NIWS has released an explanation that sounds good but doesn't actually explain.

Re: Data correction in New Zealand.

It's much simpler to delete all your observations and only keep the codged version that supports your theory:

http://www.timesonline.co.uk/tol/news/environment/article6936328.ece

Re: Data correction in New Zealand.

The warmers have countered that it is only a small proportion of all such data that was deleted--less than five percent.

http://www.eenews.net/public/Greenwire/2009/10/14/3

But apparently that is the data for all the stations whose records were adjusted. Is the corollary then that only five percent of station series were adjusted?

Steven Jones is now using the excuse that the adjustments were made to eliminate the urban heat island effect from the temperature record--a phenomenon that the warmers denied existed until it became convenient to acknowledge it. Jones is implying then with this statement that adjustments were all, or mostly, to reduce the warming trend in the raw data.

Jones also claims that all data can be gotten from the American NOAA.

Re: Data correction in New Zealand.

David,
you are right.
I think my mind was going at that point - too many blogs, too many trolls to trash, too many revelations....
I'll have to see if I can make sense of what I have said and amend it.

Re: Data correction in New Zealand.

Then: The Copenhagen Explanation is the first comprehensive statement of quantum mechanics and marks the end of classical physics.

Now: The Copenhagen Conference seeks to make the first comprehensive statement of a new world religion and mark the end of experimental science.

Re: Data correction in New Zealand.

Frank,

Could be, the Danes have never forgiven us for Nelson's epic battle. Pay back time? After two century's? --- Armed neutrality can have many guises.

David

Re: Data correction in New Zealand.

"It's much simpler to delete all your observations and only keep the codged version that supports your theory.."

There are a few people who suspect CRU haven't actually thrown the data away, an example being this blogger:

http://strata-sphere.com/blog/index.php/archives/11630

When I first heard the story a couple of months ago about the CRU throwing data away in the 1980s I had some doubts. There was a fashion in UK companies (and this might have applied to universities as well) in the 1980s to reduce clutter in offices and get rid of all the piles of paper documents by storing them in more compact microfilm or microfiche form.