Climate experts in the Northern Hemisphere consider the beginning of time to be 1979, but in Australia the world began in 1953.
Nicholls uses this graph to prove that BOM is telling the truth, and the Australian climate is falling apart. Note the start date of 1953
The start date of 1953 was carefully cherry picked as one of the coldest periods on record in Australia.
This is the same approach used by Northern Hemisphere experts, who cherry-pick 1979 as the beginning of time.