Now the the BoM adjusted warmer temperature series ACORN is in news again – thanks to Dr Jennifer Marohasy and Graham Lloyd Environment Writer at The Australian newspaper – it seems a fair question to ask. Surely if you were starting from scratch with BoM raw weather records It grows in water and is found in India, buying sildenafil Korea, Japan and Russia. They need supplements that can cater to these needs. Almonds This dry fruit is considered secretworldchronicle.com/tag/mercedes-lackey/ tadalafil 5mg no prescription as the best food for a healthy and balanced diet. But, if you are looking for a non-invasive treatment, vacuum therapy system is your pick. to build an honest temperature history of Australia – the first step would be to exclude all data known to be urban heat island UHI affected. No? There are hundreds of historic weather records available from sites with less UHI contamination – but the BoM include all Australian big cities. I’m puzzled.
Warwick,
I don’t know anything about temperature measuring equipment but have wondered if a more rapid response to temperature change by modern electronic thermometers might mean they pick up heat plumes from runways or even from jet engines and so influence maximum temperature measurements? Airports seem to be a favourite site for weather stations.
Prof Bart Geerts – Univ of Wyoming says at his page A thermometer comparison
www-das.uwyo.edu/~geerts/cwx/notes/chap03/thermometer.html
mercury thermometers are slower to respond than various electric types.
Many sceptic have concluded that the introduction of AWS into the BoM network will have introduced a bias. I recall in the 90’s seeing breaks in the Cape Otway data after the intro of AWS.
Here the BoM says that AWS record at 1 sec intervals – they do not say that daily max or min are averaged over a longer interval – so maybe our reported daily max and min are 1 second readings. Must be more spiky than mercury thermometer readings.
www.bom.gov.au/climate/cdo/about/airtemp-measure.shtml
I suppose the BoM might say that max spikes would average out with min spikes so no overall effect on mean T.
If anyone knows of a link to a BoM report addressing these issues please pass on.
I remember in the 1990’s seeing gaps in Cape Otway dailies around the time of introduction of AWS, also readings changed to whole numbers. I remember thinking that the intro of AWS would go through temperature data like a fault line.
There was talk of many lighthouses being de-staffed about this time. Staggering that such a rich country thought it could not afford wages for 50 or 100 people to staff our borders. Truly world heritage installations changed for all time. For the worse.