“Scientists say” that temperatures have risen by half a degree.

But how can they when temperature measurements were rounded to the nearest degree in the past?

kenskingdom

An Audit of Australia’s Temperature Observations

Ken Stewart

March 2012

While the Bureau of Meteorology (BOM) maintains what it insists on calling a “High Quality” dataset of temperature records with which it and the CSIRO analyse Australia’s climate, an independent audit by a team of scientists, statisticians, data analysts, lawyers and engineers has uncovered convincing evidence that the record is decidedly not high quality and is in fact inaccurate and riddled with errors. The results indicate that many High Quality (HQ) sites have recorded large amounts of data in the past 15 years that may be in error by up to 0.5Celsius, and more than half have recorded erroneous data at some time in the past 40 years. As well, a majority of sites used to compile the HQ Annual Temperature dataset inaccurately recorded observations in the Fahrenheit era by rounding to whole degrees. This alone means that temperatures before September…

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