Only a few people know
that in early 2019,
the Australia Bureau
of Meteorology
updated its ACORN
temperature dataset.
They arbitrarily
increased Australia’s
average warming
per decade,
since 1910,
by +23% !
ACORN 2 has also changed
the number of very hot days
( days reaching 40.0C or above ) .
For example:
The prior
record high number
of very hot days
was in 1952, in the
ACORN 1 dataset
Then the
1952 number
of very hot days
was arbitrarily
reduced
by -24.1%, in the
ACORN 2 dataset.
The Bureau of Meteorology
claims an increase in extreme
daily temperatures is evidence
of climate warming.
So reducing the number
of very hot days in the past,
makes the very hot days in
recent years seem larger,
in comparison.
The Australian
climate history books
climate history books
"have been cooked"
... again.
... again.
Here's a random sample
of individual Australia
weather stations:
At Bourke in NSW,
from 1910 to 2017:
Raw data: 1,909 very hot days
ACORN 1: 1,727 very hot days
ACORN 2: 1,589 very hot days
Change from
raw data
to ACORN 2: -16.7% fewer very hot days
At Marble Bar in WA,
from 1910 to 2017:
Raw data: 11,345 very hot days
ACORN 1: 10,060 very hot days
ACORN 2: 9,962 very hot days
Change from
raw data
to ACORN 2: -12.2% fewer very hot days
At Alice Springs
in the Northern Territory,
from 1910 to 2017:
Raw data: 1,526 very hot days
ACORN 1: 1,421 very hot days
ACORN 2: 1,232 very hot days
Change from
raw data
to ACORN 2: -19.3% fewer very hot days
At Boulia in Queensland,
from 1910 to 2017:
Raw data: 4,889 very hot days
ACORN 1: 4,236 very hot days
ACORN 2: 3,500 very hot days
Change from
raw data
to ACORN 2: -28.4% fewer very hot days
At Wandering in WA,
from 1910 to 2017:
Raw data: 325 very hot days
ACORN 1: 266 very hot days
ACORN 2: 219 very hot days
Change from
raw data
to ACORN 2: -32.6% fewer very hot days