Climate Change Australia – Is That Really Warming, Or Did You Just Adjust The Data?

Posted on Wed 09/30/2015 by

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Bolt New 01By Andrew Bolt ~

Jennifer Marohasy cannot understand why it’s a scandal to want to check the figures of the Australian Bureau of Meteorology:

Australia-BureauOfMeteorologyFor the true believer, it is too awful to even consider that the Australian Bureau of Meteorology could be exaggerating global warming by adjusting figures. This doesn’t mean, though, that it’s not true.

In fact, under prime minister Tony Abbott, a panel of eminent statisticians was formed to investigate these claims detailed in The Australian newspaper in August and September last year.

The panel did acknowledge in its first report that the bureau homogenised the temperature data: that it adjusted figures. The same report also concluded it was unclear whether these adjustments resulted in an overall increase or decrease in the warming trend.

No conclusions could be drawn because the panel did not work through a single example of homogenisation, not even for Rutherglen. Rutherglen, in north­eastern Victoria, is an agricultural research station with a continuous minimum temperature record unaffected by equipment changes or documented site moves but where the bureau nevertheless adjusted the temperatures.

This had the effect of turning a temperature time series without a statistically significant trend into global warming of almost 2C a century.

According to media reports last week, a thorough investigation of the bureau’s methodology was prevented because of intervention by Environment Minister Greg Hunt. He apparently argued in cabinet that the credibility of the institution was paramount … Because most journalists and politicians desperately want to believe the bureau knows best, they turn away from the truth and ignore the facts.

News Corp Australia journalist Anthony Sharwood got it completely wrong in his weekend article defending the bureau’s homogenisation of the temperature record… Sharwood incorrectly wrote in his article: “Most weather stations have moved to cooler areas (ie, areas away from the urban heat island effect). …”

In fact, many (not most) weather stations have moved from post offices to airports, which have hotter, not cooler, daytime temperatures. Furthermore, the urban heat island creeps into the official temperature record for Australia not because of site moves but because the record at places such as Cape Otway lighthouse is adjusted to make it similar to the record in built-up areas such as Melbourne, which clearly are affected by the urban heat island.

I know this sounds absurd. It is absurd, and it is also true. Indeed, a core problem with the methodology the bureau uses is its reliance on “comparative sites” to make adjustments to data at other places. I detail the Cape Otway lighthouse example in a recent paper published in the journal Atmospheric Research, volume 166.

It is so obvious that there is an urgent need for a proper, thorough and independent review of operations at the bureau.

Andrew Bolt is a journalist and columnist writing for The Herald Sun in Melbourne Victoria Australia.

Andrew Bolt’s columns appear in Melbourne’s Herald Sun, Sydney’s Daily Telegraph and Adelaide’s Advertiser. He runs the most-read political blog in Australia and hosts Channel 10’s The Bolt Report each Sunday at 10am. He is also heard from Monday to Friday at 8am on the breakfast show of radio station MTR 1377, and his book  Still Not Sorry remains very widely read.

Read more excellent articles from Andrew Bolt’s Blog . http://blogs.news.com.au/heraldsun/andrewbolt/