Giles Meteorological Station is near the small community of Warakurna located in the desert area of central Australia. The station is 1750km north-west of Perth and 750 south-south-west of Alice Springs. Meteorological records are available continuously since August 1956.
The Giles station is a particularly valuable record and it has been located at the same location since 1956 and is far removed from any urban effects. Furthermore, the station is continuously manned by observers from the Australian Bureau of Meteorology and therefore the quality of the observed data should be first class.
The raw monthly mean temperature data were extracted from the website of the Royal Dutch Meteorological Institute (KNMI).
MONTHLY MEAN RANGE
– The period of record at Giles is short (59 years) and is therefore is not a strong indicator of long-term temperature trends.
– The plots show that the data since 1956 are consistent, with no sudden “steps” (which could indicate a change in instrumentation or location) or “kinks or bends” (which could indicate local changes such as trees or buildings).
– Cyclic trends are observed for most months with a trough around 1970 and a peak around 2010. These cycles are consistent with cycles of around 80 years observed at other locations worldwide.
– Each of the 12 monthly mean temperatures were found to be virtually constant over the 59 year period, except for in August and September when the temperatures were about 1 deg C lower prior to about 1980.
– Overall, the temperature at Giles appear to have reached a cyclic peak since around 2000.
Updated 27 April 2016
This article was written by Brian Gunter Narooma, NSW. In his previous life Brian was an engineering hydrologist involved over many years in the analysis of rainfall and river flow of data for the planning of major water resources projects in Australia, Asia and Africa. In recent years he has been one of the Marine Rescue NSW (previously Royal Volunteer Coastal Patrol) volunteer weather observers who operate the Narooma station for the Bureau of Meteorology.