Articles Tagged "David Archibald"

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“Warming or cooling?”, Oil & Gas Journal, v.106 by David Archibald
Monday, June 14th 2010, 3:14 AM EDT
Co2sceptic (Site Admin)
The first thing to be aware of is that the warming effect of carbon dioxide is strongly logarithmic. Of the 3° C. that carbon dioxide contributes to the greenhouse effect, the first 20 ppm has a greater effect than the following 400 ppm. By the time we get to the current level of 384 ppm, each 100 ppm increment will produce only about 0.1° of warming. With atmospheric carbon dioxide rising at about 2 ppm per annum, temperature will rise at 0.1° every 50 years.

If that is true, you will ask, how does the Intergovernmental Panel on Climate Change (IPCC) get its icecap-melting figure of 5° for doubling of the preindustrial level to 560ppm? An equation called the Stefan-Boltzman equation tells us that in the absence of feedbacks, doubling would produce a rise of 1°. The IPCC climate modeling assumes that the feedback from this rise will be positive; that is, that the extra heat will cause more water vapor in the atmosphere, which in turn will cause more heat to be trapped, and the system compounds away until 1° gets turned into 5°. As described, the Earth’s climate would be tremendously unstable, prone to thermal runaway at the slightest disturbance.

The real world evidence says the opposite. In late 2007, a Dr. Roy Spencer of the University of Alabama published a paper analyzing data from the Aqua satellite. Based on the response of tropical clouds, Dr. Spencer demonstrated that the feedback is negative. He calculates a 0.5° warming for a doubling of the preindustrial carbon dioxide level. Global warming is real, but it is also minuscule. Atmospheric temperature rose 0.7° in the 20th century; it has also fallen by the same amount in the last 18 months. Global warming, as caused by carbon dioxide, will be lost in the noise of the system.
Source Link: scienceandpublicpolicy.org
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Another parallel with the Maunder Minimum by David Archibald
Friday, November 13th 2009, 11:37 AM EST
Co2sceptic (Site Admin)
article image
That graphic is reproduced with my annotation:

In a presentation dated 22nd September, 2009, Dr Svalgaard produced a graphic which can be interpreted to predict the timing of the Solar Cycle 24 maximum.

That presentation is available here: http://www.leif.org/research/Predicting%20the%20Solar%20Cycle.ppt

Click source to read FULL article from WUWT
Source Link: wattsupwiththat.com
David Archibald’s elegant illustration of how late and weak solar cycle 24 is proving
Tuesday, May 26th 2009, 11:46 AM EDT
Co2sceptic (Site Admin)
Image Attachment

This posting is by David Archibald from October 2008
Source Link: warwickhughes.com
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Press Release: Perth climate scientist to meet with Czech President
Monday, April 12th 2010, 8:49 AM EDT
Co2sceptic (Site Admin)
Internationally acclaimed Perth-based environmental scientist, David Archibald, will visit the Czech Republic this week to meet with the country’s leader, Vaclav Klaus. The pair will discuss climate and energy issues.

Mr Archibald is recognised as one of the world’s leading climate change sceptics. His theory that change in the Earth’s climate is caused by the solar (or sunspot) cycle, rather than by human activity, is gaining widespread attention.

The Czech President has been vocal in stating that the implementation of legislation based on global warming theory is a dangerous infringement of personal liberty.

Mr Archibald’s arguments are based on his detailed studies of the solar cycle.

The current cycle, Solar Cycle 24, commenced in December 2008 and has been unusually weak. Mr Archibald believes that this will cause the planet’s climate to continue to cool for at least the next twenty years.
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Solar Cycle 24: Implications for the United States by David Archibald
Saturday, September 5th 2009, 1:03 PM EDT
Co2sceptic (Site Admin)
David Archibald, International Conference on Climate Change

Do we live in a special time in which the laws of physics and nature are suspended? No, we do not. Can we expect relationships between the Sun’s activity and climate, that we can see in data going back several hundred years, to continue for at least another 20 years? With absolute certainty.

In this presentation, I will demonstrate that the Sun drives climate, and use that demonstrated relationship to predict the Earth’s climate to 2030. It is a prediction that differs from most in the public domain. It is a prediction of imminent cooling.
To put the solar – climate relationship in context, we will begin by looking at the recent temperature record, and then go further back in time.

Then we will examine the role of the Sun in changing climate, and following that the contribution of anthropogenic warming from carbon dioxide. I will show that increased atmospheric carbon dioxide is not even a little bit bad. It is wholly beneficial. The more carbon dioxide we can put into the atmosphere, the better the planet will be – for humans, and all other living things.

Please click source link to download PDF file
Source Link: warwickhughes.com
SUNSPOT MINIMUM AT HAND
Wednesday, June 3rd 2009, 6:50 PM EDT
Co2sceptic (Site Admin)
Image AttachmentThe sun has become more active in recent days with cycles 24 spots in middle latitudes. See sunspot group number 11019 for group of red spots. This is slightly diminished since yesterday. The dark green areas are coronal holes out of which the solar wind escapes at higher velocity.

Please click this link to read FULL report from IceCap.US
Source Link: icecap.us
The Past And Future of Climate by David Archibald May 2007
Monday, June 15th 2009, 4:07 AM EDT
Co2sceptic (Site Admin)
In this presentation, I will put forward a prediction of climate to 2030 that differs from most in the public domain. It as a prediction of imminent cooling. And it is a prediction that you will be able to check up on every day.

I am going to start off by looking at the near term temperature record, and then go back successively further in time, looking at the range of temperatures in the historic record and then the geological record. Then we will examine the role of the Sun in changing climate, and following that the contribution of anthropogenic warming from carbon dioxide.

I will finish up combining a solar-driven prediction and the anthropogenic contribution to make a prediction of climate to 2030.

The Past and Future of Climate by David Archibald PDF download
Source Link: climatepolice.com
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