Category Archives: Surface Record

Daily temperature range (DTR), max minus min, some ramblings

Philip B commented on “Climate predictions “right only half the time””

Warwick you wrote:

Since the nighttime temperatures are rising three times as fast as the daytime temperatures (Karl et al., 1993), it implies a non-climatic signal in the nighttime data equal to about one half of the total warming. It implies the reported global warming of 0.6 C in the twentieth century should be reduced to about 0.3 C.

Have you seen the analyses of Australia temperature data at Gust Of Hot Air?

It shows that rising minimum temperatures are giving a false impression of rising nighttime temperatures, which are rising much less than the minimum, in a number cases there is no rise at all even though the minimum is rising.

It is hard to avoid the conclusion that rising minimum temperatures reflect increased daytime warming and not increasing nighttime temperatures. As well as that increasing minimum and maximum temperatures are showing more heat gain to the system than there is.

After replying, I thought we needed a new thread

You had me searching for that quote Philip. It is on a page written by Dr Doug Hoyt, just above his references.

I agree with his thrust there as I have thought for years now that IPCC supportive scientists have attributed DTR closure to a greenhouse signal when in fact it is exactly a UHI signal – which they always manage to either ignore, trivialise or minimise in some way.
Continue reading Daily temperature range (DTR), max minus min, some ramblings

Weather station urban heating realities

Anthony Watts of northern California has just posted some very informative photographs of weather recording stations in his region north of San Francisco showing the temperature sensors placed near local heat sources. (ClimateAudit has a new post too introducing Anthony’s work.)

In 2001 I put up a page on what the various temperature data told for the Los Angeles grid cell.

More recently a paper in 2005 found that both the LA grid cell (30-35N, 115-120W) and San Francisco grid cell (35-40N, 120-125W) where Anthony’s stations locate, both have greatly varying trends 1976-2003 according to whether you believe Jones et al/CRU data or the GHCN data. See my post Is this 2005 paper by leading IPCC climate scientists, deceptive ? which links to my new map showing that in 57% of global grid boxes, CRU and GHCN vary by more than 1 degree per century.
Continue reading Weather station urban heating realities

Disparity in tropical T datsets, 20 North to 20 South

A reader has emailed to say,

“Virtually all GCMs result in the temperature of the troposphere at the
tropics increasing at about 1.3x that of the increase in the surface temperature. But all observations show that troposphere temp in the tropics is increasing at 1/2 to 1/3 that rate. Isn’t that proof that the greenhouse effect can not be causing an increase in surface temperature? How can something gaining less heat(trop.), heat something gaining more heat(surface)?

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The graphic below shows the differences between MSU and the Hadley Centre and GHCN/CAMS data.
T trends in the tropics

The Past and Future of Climate by David Archibald

Link to 400 kb pdf file of David’s provocative and original updated (May 2007) paper which says we are coming into a weaker solar cycle and that a cooler climate is likely in decades ahead. David also explains that the Greenhouse effect due to carbon dioxide is miniscule, as does the 1998 paper by Sherwood Idso.

See, How MINISCULE is the Anthropogenic Greenhouse Effect ? an html version of a 1998 paper by Sherwood B Idso in Vol 10: 69-82 of Climate Research, “CO2-induced global warming: a skeptic’s view of potential climate”.

See also Jack Barrett’s paper: Greenhouse molecules, their spectra and function in the atmosphere

The Great Olenek Mistake

Olenek is a weather station in the Taymir Peninsular, Northern Siberia, 68.5 N, 112.4 E, altitude : 220 m. For map;
www.warwickhughes.com/climate/taymgrid.gif
For a discussion of Tsurf trends in this region see;
www.warwickhughes.com/climate/tamyr.htm
That’s the introduction and there is plenty of reading and points to explore there, however the purpose of this post is to expose a particularly gross inhomogeneity in Olenek data when compared to its neighbours. A fault not picked up in 15 to 20 years by the three major global climate groups. Continue reading The Great Olenek Mistake

The Great Global Warming Swindle

View the Ch4 (UK) TV documentary online thanks now to YouTube.
Watch, listen, do some thinking, make up your own mind.
The original link to Google video seems now dead, 15 Mar

Does anybody have a very detailed list of Russian met station locations ?

At ClimateAudit, Steve McIntyre has a Feb 19 2007 post ” Jones and the Russian UHI”, tackling the issue of replicating what was done in the highly influential Jones et al 1990 Letter to Nature.

See my rebuttal of this pivotal Jones et al 1990 Letter to Nature at: www.warwickhughes.com/papers/90lettnat.htm

Steve recounts how years ago he asked Dr Jones for the Western USSR station data and was given various reasons why the data had been lost.
Continue reading Does anybody have a very detailed list of Russian met station locations ?

How hot was the Arctic in the 1930’s ?

Jonathon Lowe quotes research by Polyakov et. al at his excellent Blog, “Gust Of Hot Air”. Readers could spend some time reading Jonathon’s other fascinating articles investigating Australian temperature data.

Huge variations now between the 3 main global T datasets

The UKMO Hadley Centre is taking a more prominent role now in IPCC global temperature compilation. Compiling “global warming”.

Just at a time when the IPCC is “releasing” its version 4 masterwork in its own restrictive and controlling way, it is fascinating to compare 2005 global T anomaly maps for three major climate groups.