Australia

o.j.a kirjoitti:

Valehteleeko exmerenmies kun se väittää, ettei siellä ole mitään poikkeuksellisen kuumaa ollut, normaalia kesäsäätä vain?

Katsopa ensin tätä, ennenkuin väität minua valehtelijaksi.

Bureau Confirms Calculating Australia’s ‘Average’ Temperature Involves Some Hocus-pocus
THE Australian Bureau of Meteorology, BOM, doesn’t have a set of temperature thermometers regularly positioned across the landmass of Australia from which it might derive an average annual temperature. Rather many more of it’s approximately 750 temperature recording stations are in south eastern Australia, some have records that date back to the 1850s, while others only started recording last year.
How do you derive an average annual temperature for Australia from such a mix of measurements?
The Bureau’s solution is to select a subset of about 112 stations from the 750. Some of the stations in the subset started recording temperatures in the 1850s, others not until the 1960s. Then the bureau truncates the longer temperature records, in some cases by discarding over 50 years of data, indeed everything before the somewhat arbitrary date of 1910. Data before this date is not considered reliable, but then the Bureau applies corrections to some of the rest of the data even though it should be reliable. Then the adjusted and truncated values from the subset are fitted to a grid to generate an area-weighted average of the data.