The Heartland Institute reports that the Australian Bureau of Meteorology (ABM) has been forced to admit it alters the temperature recorded at almost all the official weather stations in Australia. The ABM came clean on its temperature fiddling because of the fierce scrutiny of Graham Lloyd, environment editor for The Australian newspaper. Using a process it calls homogenization the ABM has replaced actual temperature measurements with massaged numbers. Almost all the alterations resulted in higher temperatures being reported for the present and lower numbers for the past---with the higher numbers being used to demonstrate a historical warming trend---than the numbers that were actually recorded! The differences between actually measured temperatures and homogenized temperatures topped 4 degrees celsius over certain periods at some measuring stations.
Australian climate scientist Jennifer Marohasy wrote on her blog the temperature alterations were seemingly done at "whim", resulting in what "amounts to corruption of the scientific process on a grand scale, with significant economic implications". William Kinninmonth former head of the National Climate Centre at the US Bureau of Meteorology said there is no justifiable basis to modify actual observations without evidence of change instruments or environmental factors.
source: jennifermahorasy.com
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