Category Archives: Urban Heat Islands

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.

Claim of warmest July ever for Canberra fails to pass elementary checks

The mainstream media TV weather news and press has been spouting the Bureau of Meteorology (BoM) claim that July was the warmest ever in Canberra with a mean monthly max of 13.3. Yet you only have to check early 20th Century data from Queanbeyan to see the claim is dubious. Data from BoM.

Queanbeyan recorded the same 13.3 in July 1924 and 1937. OK so Qbn was no doubt UHI affected to some extent – but probably no more so than Canberra Airport is now. So given the poor quality of data from weather stations – the best you could claim about July is that it was warm and probably similar to a few other July’s in the past 100 years. As I have said a few times, everything the BoM says needs examining with a fine toothed comb.

Bureau of Meteorology feeds the main-stream-media dubious warming propaganda

I was interested in this Sydney Morning Herald article with various statements about recent warm conditions in Sydney.
When you search for the headline – Cooler weather to mark start of winter – at the SMH website you get this intro text at the link –
“Another warm month makes the last 12 the hottest June-May stretch on record for Australia…think about that over the wet, cool weekend.” So I thought about that – take a look at the BoM map of maximum temperature anomalies for the 12 months ended 31st May. See that the highest ranking anomalies are in areas where the data is most scarce. Note that Alice Springs with data from ~1878 is the longest term station by far near these BoM high rank red anomalies. Checking Alice Springs history at this BoM site you need to copy and paste data for Alice Springs Post Office 15540 and then Alice Springs Airport 15590. Updating recent months from here.
You find that the 12 months ending 31 May 2013 averaged 30.6 – the 12 months ending 31 May 1881 averaged 30.8 – and the 12 months ending 31 May 1893 averaged 30.7. So I am left with the suspicion that if we had adequate historic data over Australia – then the statement – “Another warm month makes the last 12 the hottest June-May stretch on record for Australia…think about that over the wet, cool weekend.” – would be even harder to justify.
Any warmth in Autumn is at least partly due to the ever growing Urban Heat Island over Sydney. Rarely mentioned by the BoM and their supporters.
Another claim in the article – “Autumn registered only six days of days below 20 degrees…”. Attempts to paint Autumn as unusually warm – yet look at the BoM maps of maximum temperature anomalies for autumn – amazing anomalies of zero to 1 degree C. Near normal weather – what an utter non-event.