Mysterious Warmth at Mackay

By Dr Michael Chase – Re-Blogged From WUWT

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Map above: Changes in maximum temperatures (Tmax) in Australia since 1910, according to the Australian Bureau of Meteorology (BoM)

SCOPE and PURPOSE

At face value this article is about why the region of Australia centred on the city of Mackay in Queensland has appeared to have warmed more than its surroundings since 1910. The short answer is that this hotspot, and almost certainly all the other hot and cool spots on the BoM map shown above, reflect errors in homogenised data. This article starts by revealing clear and irrefutable errors for the specific example of Mackay, with minimal explanation, and then goes on to provide some technical details of the analysis method. The simple validation procedure outlined here is applicable to all homogenised surface air temperature datasets.

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How More Cooling Generates Global Warming

Re-Blogged From WUWT

From the “we’ll fix that in post” department comes this from down under courtesy of Dr. Jennifer Marohasy.

COOLING the past relative to the present has the general effect of making the present appear hotter – it is a way of generating more global warming for the same weather.

The Bureau of Meteorology has rewritten Australia’s temperature in this way for the second time in just six years – increasing the rate of warming by 23 percent between Version 1 and the new Version 2 of the official ACORN-SAT temperature record.

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BoM’s Changes to Darwin’s Climate History

By Dr. Jennifer Marohasy – Re-Blogged From WUWT

The hubris of the Australian Bureau of Meteorology is on full display with its most recent remodelling of the historic temperature record for Darwin. The Bureau has further dramatically increased the rate of global warming at Darwin by further artificially lowering historic temperatures.

This begins by shortening the historical temperature record so that it begins just after the very hot years of the Federation drought. Then by changing the daily values: that is changing the observed measured temperatures to something else.

For example, on 1st January 1910 the maximum temperature recorded at the Darwin post office was 34.2 degrees Celsius.

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