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The less reassuring factor is that all of New Zealand's temperature is measured by seven locations. From those sites, an average temperature of all of New Zealand is extrapolated. Similarly an average temperature of the world is extrapolated from only the measuring sites. That's the instrumental record. But now, we see that it has been fraught with problems: mistakes, fraud, fudging, and stuff like urban heat islands which have not been accounted for.
Redux you should be happy to throw out this method of measuring anyway. It has not shown any global warming for ten years. And anyway, as I said before, there are other measurement methods that show warming, just not as extreme.
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