All posts by Warwick Hughes

End of year alteration shenanigans at CRU

I have just added a line on Coolwire 16 to weird goings on at the CRU Climate Monitor website re deletions of 2005 gridded data images from March 2005 on.
IMHO it looks as if they wanted to see if 2005 could be a candidate for Hottest year ever. I know others have noticed this CRU habit long before this Blog.
No shame at all.
Caught out with their own date stamps. Check it out for yourself, please let me know when March 2005 on are replaced.

Dodgy BoM map supports “Nation bakes in its hottest year” media article

See Coolwire 16 for discussion of the above article and this BoM map published on page 7 of The Weekend Australian 17-18 Dec 2005.

Note how 90% of the orange area of highest warming is from regions of Australia largely devoid of people and I would suggest devoid of meaningful long term temperature data too.

What disgraceful BoM propaganda, taxpayer funded.

How did Jones et al 1986 and Jones 1994 select Atlanta ?

This is the first “city” study I put online in 2000. There is nothing isolated about Jones using a city with such obvious UHI contamination as Atlanta, they used hundreds of cities.


In the face of this methodology, the AMS journal in 1986 published not ONE comment and I am not aware anybody tried to comment. I look forward to hearing some justifications from IPCC supporters for the use of Atlanta and similar data to contribute to an accurate measure of global temperature trends.

WA Govt. wastes 75 GL of rainwater in 2005

Perth uses approximately 300GL of water PA.

The Govt. is constructing a ~$400Mill seawater desalination plant to produce 45GL PA.

In 2005 May to October (the runoff season) Perth dam catchments which total 3500 squ. kms had circa 958mm of rain. This equates to about 3353GL water falling free into catchments of which approx. 115GL flowed into dams, meaning that catchment efficiency (yield) was 3.4%.

My graphic at the Perth Water Users web site shows that up until the mid 1990’s catchment efficiency was 5.5 to 6%. Let’s just assume for a minute that our Governments had been sensible and maintained catchment management work, keeping yields this year at say 5.7%. An increase of 2.3% (5.7-3.4) in this years yield would have put an extra 75+ GL (2.3% of 3353 GL) into our dams, which is 160% of the projected production from the Kwinana Desalination Plant (KDP), where costs have already blown out to over $387Million.

USSR spurious high warming regions

Station temperature records are examined in nine five-by-five degree grid cells in the former USSR claimed by Karl 1998 to have warmed by circa 2 degrees over the period 1901-1996. Karl’s results, derived from updated Jones 1994 grid point data, are compared with temperature records from the Jones 1994 global update, the V2 GHCN and the NASA GISS website. In no grid cells are rural station records found to justify the warming claimed in Karl 1998. In three grid cells, stations with warming trends close to the Karl 1998 anomaly magnitudes are found, but in all three cases cities are the source of the apparent warming, which is not apparent at nearby small town or rural stations. The other six grid boxes contain either stations not warming at the rate suggested in Karl 1998, or very incomplete data for the 1901-1996 period. Station-by-station comparisons in all grid boxes show significant trend differences between Jones 1994 and GHCN/GISS data. In recent years it has become apparent that a sizeable share of century-long "global warming" is in the region of the former USSR. This paper examines at the level of individual weather station records the evidence for the claim in Karl 1998 of circa 2 degrees warming during 1901-1996 in nine grid boxes in Siberia and eastern Kazahkstan. Karl’s 1998 paper contributed to the IPCC publication "The Regional Impacts of Climate Change". Similar global maps of grid box anomalies are seen in the IPCC 2001 Third Assessment Report (TAR) Figure 2.9

Jones et al: South Africa

Jones et al trends in South Africa are even more dominated by cities than their Australian data.

In 1991 I started hunting down temperature data that was not used by Jones et al 1986 and this lead to me contacting the South African ‘Weeburo” late in 1991 by mail. Despite considerable turmoil in that country I had the luck to encounter a helpful official who mailed me back a couple of diskettes with rural and small town data from 1960-1990.

This lead to the 1996 paper with Professor Robert C. Balling Jr., of Arizona State University which was posted online years ago by the late John Daly.

Warwick S. Hughes and Robert C. Balling, Jr. “Urban Influences on South African Temperature Trends.” International Journal of Climatology, Vol. 16, No. 8, pp. 935-940.

[Online at John Daly’s site]

The paper demonstrates large differences between rural trends and the Jones et al trends dominated by cities.
Of course hugely ignored in IPCC circles. After 1991 I tried to obtain longer term S.A. data but co-operation stopped after they were contacted by BoM people. We know how it works.

Australian reviews of UHI errors (Part 2)

In 1991 the writer (WSH) reviewed the Jones et al temperature data for Australia along with a wider selection of Australian data while associated with the Tasman Institute in Melbourne. The Executive Summary of that unpublished report which was circulated to interested parties, has survived in digital form and is presented here for the first time.

[Note, the Tasman Institute was a free market think tank in Melbourne for about a decade, closing in the late 1990’s.]

Continue reading Australian reviews of UHI errors (Part 2)

Australian reviews of UHI errors (Part 1)

In Australia, two unpublished reports were generated about 15 years ago which went to the issue of the validity of using urban stations to compile large area temperature trends.

[1] The 1990 BoM draft Paper, M.J. Coughlan, R. Tapp and W.R. Kininmonth; 1990, “Trends in Australian Temperature Records” by three senior BoM staff, defined urban heat island (UHI) magnitudes by various comparisons between central city sites in all the Australian state capitals and their respective airports, more than one satellite site in the case of the larger cities.

The BoM found substantial urban warming greater than the scale of global warming. Extracts from Coughlan et all 1990 are below.

[View first page of Coughlan et al 1990. Download 300KB zip file of 18 gif images of Coughlan et al ]

Conclusion from Coughlan, et al 1990 re Urbanization Trends

3.3 Mean temperatures

Estimates of the trends in the annual average daily mean temperature also indicated warming at most of the non-urban sites except Brisbane Airport. The strongest warming over the periods examined was 0.26 C decade-1 Mean temperatures at Brisbane Airport cooled by approximately 0.03 C/ decade. Trends in urban-rural differences were all positive.

These estimates are greater than those of the trends this century, reported by Jones et al. (1989), in annual mean Southern Hemisphere air temperature, over both land and sea, and sea surface temperature, which have all shown rises of approximately 0.06 C /decade.

Continue reading Australian reviews of UHI errors (Part 1)