How They Try to Make It Warmer

Retired school principal Kenskingdom was alarmed by this Bureau of Meterology graph, showing a strong warming trend for Victoria: ...

He checked the data from which the trend, and found it had first been adjusted and turned into “high quality” data. As a BOM spokesman assured him:

On the issue of adjustments you find that these have a near zero impact on the all Australian temperature because these tend to be equally positive and negative across the network (as would be expected given they are adjustments for random station changes).

Actually, no, though. You see, Kenskingdom discovered that the adjustments served to exaggerate Victoria’s warming remarkably:



Kenskingdom goes through the individual stations for you and concludes:

There is a distinct warming trend in Victoria since the 1960s, which has been especially marked in the last 15 years.

The first half of the record shows a cooling trend. BOM’s adjustments have attempted to remove this.

2007, not 2009, was the warmest year in the past 100 years.

Three stations identified as urban in 1996 have been included.

Many stations’ data have been arbitrarily adjusted to cool earlier years

Only one station has had its trend reduced. Two are essentially unchanged.

Ten of Victoria’s 13 stations have been adjusted to increase the warming trend, to the extent that there is a warming bias of at least 133%, more likely 143%.

These adjustments, and the Australian temperature record to which they contribute, are plainly not to be trusted.

UPDATE

More climate wisdom from the Bureau of Metereology:

Melbourne has experienced its wettest June in nine years, recording 59 millimetres of rain, 10 millimetres more than the long term average…

But despite the damper conditions, the Bureau of Meteorology says there’s no end in sight to the drought.

The heavy June rain was, once again, not quite what the warmist BOM predicted back in March:

Contrasting this, the chances are between 30 and 40% for above average June quarter falls in an area encompassing much of central to southeastern SA, northwest Victoria and the far southwest corner of NSW… Across the rest (and most) of the country, the chances of exceeding the median April to June rainfall are between 40 and 60%, meaning that above average falls are about as equally likely as below average falls.

From Andrew Bolt