Had to cable up some old HDD’s and made a few interesting discoveries – GISS around 2000 made an attempt to adjust for UHI contamination using a long tapered adjustment – which in retrospect was probably one of the better attempts by any of the big IPCC climate groups to deal with UHI.
Most of them do nothing. I am looking for some data files showing the tapered UHI adjustment.
SMH news item quoting the BoM – Melbourne’s record warm spell may stretch into June – no mention of urban heat island (UHI) site issues at Melbourne Regional Office 86071. Recently the BoM commenced weather recordings at Olympic Park station#86338 which will eventually replace the highly urbanized current site Melbourne Regional Office station#86071
Yes that is where they are claiming a warmth record – in the face of 150 odd years of urbanization feeding warmth into weather data.
Ignoring that the new site at Olympic Park 86338 which is still central to a huge urban heat island but is slightly less UHI affected than 86071 – only saw 9 days over 20 up to the 21st May.
Thanks to Geoff Sherrington who sent in this gem of Nelsonian telescope use.- Geoff also mentioned these 1904 & 1866 warm spells that except for minor gaps show that weather experienced by Melburnians has changed little in 149 years.
Since 9th Feb I have been noting down the simultaneous temperature of pre-dawn air coming in my front door compared to Canberra Airport ~13km away as a crow might fly.
We are not that far from Hall, near farmland to the west and about 100m higher than the airport so in theory we might expect to be 0.64°C cooler. The front door faces east into a suburb and it so happens that most mornings a noticeable breeze comes in the door when opened.
I expected the vagaries of weather would produce a few days when we were cooler than the airport. It turned out that only on one day 16 March were we 0.2 cooler than the airport and that morning was blowing a warmish nor-wester at 16C – the wrong direction for the front door so I took a reading in the yard in full breeze.
Anyway – here is the chart, of suburban air temperature read in the dark minus the Canberra Airport reading off the www. Days of greater contrast tend to have clear skies – rainy days tend to show the least contrast. Average contrast over the 75 days – 3.7 degrees.
I wonder if readers ever try similar comparisons in their local region.
Note my thermometer is a little battery powered “thermistor” gadget with a metre of wire, digital readout to 0.1deg – which I had calibrated informally against two liquid in glass thermometers.
Just click on the ACORN category and the seven articles come up starting June 2012.
Here is Sydney raw max & min annual temperature history –
This shows raw compared to ACORN also annual – you easily see where the effective adjustments are concentrated.
From 1 Jan 1983 on to present day there are no adjustments made to the daily max data. There are however some days when the raw reading is discarded to leave a data gap in ACORN. In the case of minimums (nightime) the data has no ACORN adjustments from 1 Jan 1964 to present day. But like the max – ACORN finds quite a few minimums not fit for ACORN.
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Daily ACORN min minus raw min
To me it looks like machine driven stroking & tweaking.
The ABC reports – Records melt as Hobart swelters through hottest April day in 132 years –
Checking hottest April day statistics at this BoM page – just amend the station number in the URL.
Checking daily data a month at a time in District 94 on Australian Weather News AWN – April 2005 at AWN shows the two hot days on 1st & 2nd.
The article could have been more balanced by pointing out other hotter events in the very small and variable District 94. IMHO Tuesday was just another early April hot day where the peak max happened to fall at central Hobart. I wonder if we should expect more balance from our scientists at the Bureau of Meteorology.
Make anomaly maps for any day you choose at this BoM page.
I saw this issue at Anthony Watts which was from Joe D’Aleo – commenting on the less than stellar NOAA map. Which several commenters seemed to distrust.
Curiosity got me looking in NOAA for the original – which I did not find – but I found this map below which gives a more balanced view of February temperature anomalies if you examine it.
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For example the orange warmest division is only plus 7.2 while there are several very cool divisions dark blue with anomalies as cool as minus 12. The USA 48 had a cool anomaly for Feb 2014. Can anybody explain why the Ranks map should be so different to the Anomalies map?
Here is a map of the maximum temperature anomalies for summer.
WA’s ‘mad’ summer is proof of climate change: BoM expert – PerthNow
The national average was under +0.5°C. I think the Perth BoM needs a Bex a cuppa tea and a good lie down.
below you can see each day of the Perth summer set out in the 3 months from Australian Weather News.Pale Blue is the background colour for minimums which presumably signifies a range around average with Yellow highlighting warm nights and a brighter Turquoise for cooler nights. Pale Pink is background for max which also seems to signify a range either side of average – Turquoise is cool, Yellow is warm – Buff is hotter. The top row is minimum or night temperature – second line is day or maximum. So just running your eye along you get the impression of the extent of cool spells, warm spells and periods near average.
December 2013
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January 2014
February 2014
Now tell me what looks mad?
Dr. Ronan Connolly has sent me their paper Urbanization bias I. Is it a negligible problem for global temperature estimates? R. Connolly, and M. Connolly (2014). Open Peer Rev. J., 28 (Clim. What Is The Pathophysiology Of The Problem? The physiology of an erection involves the arousal of the brain’s response to on line levitra regencygrandenursing.com erogenous thoughts. Sex plays buy uk viagra a significant role in the life of each and every person. It strengthens the heart and is very safe. Higher than average concentrations of estradiol make the lowest price for viagra human body to overcome impotency affectivities. Sci.), ver. 0.1 (non peer reviewed draft). A quick read through has impressed me sufficiently that the authors can be a force to hold to account some of the less than stellar science published by the huge pro IPCC temperature analysis teams. I was particularly taken with their reviewing of the nine errors that Wigley & Jones 1988 claim were made by Wood 1988 in his critique of Jones et al 1986. I have Wood 1988 scanned online and a Table listing my comments on the supposed nine errors of Wood. Readers can now follow both sets of comments on the nine claims by Wigley & Jones and make their own minds up.
If Wood 1988 made an error it was in concentrating his critique too much on the USA – instead of quoting examples from more regions.