Category Archives: Urban Heat Islands

Sydney enjoys coldest Australia Day for 50 years

Of course you are seeing this in MSM headlines?
Yesterday Sydney barely struggled above 20°C on Australia Day the 26th January 2015 – in the face of the ever growing urban heat island too – 30 minute data preserved – online here – You have to go back to 1965 when the max was 20.7 (ACORN says 20.9) then in 1957 the max was 19.4 (ACORN said 19.6) Daily max and min data – as I write the BoM is slow to update the max for Monday. But Australian Weather News already has Monday the 26th at 20.0

Temperature anomaly maps for France show recurring anomalies from year to year

A reader has sent in these maps observing some features live on from year to year. “Compared to 2014, west of Strasbourg is more or less the same in 2013, and there is another one near Manosque, northeast of Marseilles, repeatedly. The Paris heat island is in all of them, and the last 3 years Chalons en Champagne is always too cold and inland from Brest too warm.” I agree the French data looks poorly calibrated – will try and get a new 2010 map with the same normals period as the others.
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Did the Brisbane urban heat island (UHI) affect the location of storms on 27th November 2014?

I was away all yesterday in the boondocks and heard on the car radio news of the Brisbane storms with hail and damage. Brisbane smashed by storm super cell: Premier calls in Army to help with clean-up

I just post this map of rain up to 9am on the 28th (recorded up to 4am) to float the idea again that the urban heat island can attract rain. The mechanism could be due to the man made increased albedo contrasts accentuating the formation of convective storm cells. I am interested to see what readers think. I realize there is a greater concentration of rain gauges in SE Queensland.
I have had previous posts on this subject but not on Brisbane. In February I posted – Did the Adelaide urban heat island (UHI) increase rain there last night? and there is a link there to an example from Melbourne. I am sure I have read of examples from books and published papers.

GISS urban adjusted version for Melbourne Australia from year 2000 compared with 2014 adjusted version

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.

Open Peer Review Journal – publishing new research into urban heat island UHI effects in global temperature compilations

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. 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.

Australian Bureau of Meteorology takes urban heat island (UHI) into account when announcing heat records

I have just been told by the Parliamentary Secretary to the Minister for the Environment – Senator the Hon Simon Birmingham – that when _ “…the Bureau publishes relevant records of weather and climate occurrences and extremes based on observations from sites around the country.”
The BoM is “…taking into account any urban heat island effects in towns and cities.”
Can anybody find me an example of this? Click to read my 12 Nov 2013 email to Minister Hunt and their reply
Continue reading

How many times does a truth have to be told ? – UHI warming has been cemented into global temperature series by adjusting for steps outward from cities

I see Anthony Watts article on a new paper in Theoretical and Applied Climatology – “Effect of data homogenization on estimate of temperature trend: a case of Huairou station in Beijing Municipality”. Thanks to Springer for making this paper open access. My point here is that this diagram which shows how UHI warming gets fixed into adjusted series –

is telling the exact same story as Hansen et al told in 2001 with these very similar diagrams.

Figure 1 from; Hansen, J.E., R. Ruedy, Mki. Sato, M. Imhoff, W. Lawrence, D. Easterling, T. Peterson, and T. Karl 2001. A closer look at United States and global surface temperature change. J. Geophys. Res. 106, 23947-23963, doi:10.1029/2001JD000354
I first mentioned this in Feb 2006
GISS/NASA/NOAA graphics illustrate significant UHI truths
Again in Jan 2011
Simple GISS diagram illustrating warming effect of conventional “adjustments” of “steps” in T data due to site moves outward from urban centre.
Starting with Jones et al 1986 all the global groups make exactly this error.
Global temperature trends would be more accurately assesed by just gridding the raw data. Leave the steps in – in the absence of all the hard work to adjust out UHI warming – this will produce a trend closest to reality.
Terabytes of IPCC compliant global temperature trends research are not worth a cup full of warm spit. If I had to answer my question – How many times does a truth have to be told ? – I recall a saying somewhere – Green media lies travel like speeding arrow – the truth struggles to swim uphill.