Articles Tagged &quot;Alan Siddons&quot;

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ALAN SIDDONS

Reality vs Assumption

Thursday, January 22nd 2009, 2:02 AM EST

Co2sceptic (Site Admin)

More evidence that engineers are familiar with phenomena that climate modelers never heard about. Or disregard.

From Concrete Construction Engineering Handbook by Edward G. Nawy

File attachment: 2010/More evidence that engineers are familiar.pdf

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ALAN SIDDONS WEB ARTICLE UPDATED

Legislative panel skeptical about global warming

Wednesday, January 14th 2009, 4:01 AM EST

Co2sceptic (Site Admin)

TALLAHASSEE — Proposals aimed at curbing Florida’s greenhouse gas emissions led to skepticism about global warming from a key legislative committee Tuesday, highlighting potential trouble for the most significant environmental legislation expected in this year’s regular session.

Members of the House Energy and Utilities Policy Committee spent more than 2½ hours grilling representatives from the Department of Environmental Protection, Florida Energy and Climate Commission and the Public Services Commission about efforts to cut emissions of carbon dioxide and other greenhouse gases. Most scientists consider those gases the main cause of global warming..
Updated below with comments from Alan Siddons

Source Link: jacksonville.com

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ALAN SIDDONS VIA EMAIL

I’d like to expand on that if I may. (David Archibald book review By Cliff Ollier)

Tuesday, January 13th 2009, 2:18 PM EST

Co2sceptic (Site Admin)

From the review: They use the Stefan-Boltzmann Law (which is inappropriate as the Earth is not a perfect blackbody)

I’d like to expand on that if I may.

Here is the radiant energy vs temperature rule for a sphere: You correct for albedo, divide by four, and use that figure to determine the temperature. For example, the earth’s albedo (reflectance) is about 0.3. Absorption is therefore about 0.7. So multiply 1368 watts per square meter (sunlight’s strength at the earth’s distance) by 0.7. That’s roughly 957.6. Divide by 4: 239.4. Now look up the blackbody temperature corresponding to an irradiance of 239 W/m²: it is 255 Kelvin. Voilá. That is given as the earth’s blackbody temperature. The same method is used for every planet. One size fits all...Please Download PDF file

File attachment: 2010/Id like to expand on that if I may.pdf

ALAN SIDDONS UPDATED VIA EMAIL EXCLUSIVE DAVID DEMING WATER VAPOUR

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Water vapor is an "anti-greenhouse gas"

Thursday, January 8th 2009, 12:19 PM EST

Co2sceptic (Site Admin)

This relates to water vapor "feedback" due to CO2's alleged "radiative forcing." See below for further comments from Richard Linzen, Brian Valentine, Lord Monkton, Fred Singer, David Deming & Ben Herman

From A Simple Method to Measure the Dew Point Temperature
by R. L. Snyder, Biometeorology Specialist

Gaseous water molecules consist of one oxygen and two hydrogen atoms. When in a liquid state, the water molecules form strong hydrogen bonds between the molecules. In order to evaporate water, heat must be supplied to break the hydrogen bonds and allow individual molecules to break off as a gas.

WEB ARTICLE ALAN SIDDONS UPDATED MICHAEL R. FOX

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Falsifying the Global Warming Hypothesis

Wednesday, January 7th 2009, 12:39 PM EST

Co2sceptic (Site Admin)

Consider the working hypothesis of anthropogenic global warming (AGW). It states "man-made CO2 causes global warming". The question now is does this hypothesis work? Is it true? Is it valid? Does it explain the climate observations and the data that are found in the real world?
Updated below from Alan Siddons

Source Link: hawaiireporter.com

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ALAN SIDDONS VIA EMAIL EXCLUSIVE

Learning by candlelight

Monday, January 5th 2009, 3:35 AM EST

Co2sceptic (Site Admin)

To see a world in a grain of sand... - William Blake

While enjoying a recent effect of Global Warming, a week-long blackout brought on by a freak ice-storm which devastated the central Massachusetts region, I had ample opportunity to contemplate how a candle’s flame behaves.

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VIA EMAIL EXCLUSIVE ALAN SIDDONS

Alan Siddons: Proof that anthropogenic CO2 is not accumulating

Saturday, August 30th 2008, 6:02 AM EDT

Co2sceptic (Site Admin)

Proof that anthropogenic CO2 is not accumulating
by Alan Siddons

Anthropogenic CO2

By current estimates, man is pumping about 4 ppm of CO2 into the air every year. But the atmospheric level is rising only 2 ppm every year. Theory has it, then, that half of human emissions are presently getting absorbed by so-called carbon sinks, thereby cutting the net emission in half every year.

Yet if half of human emissions stay in the air and the other half goes elsewhere, this proves that anthropogenic CO2 is not accumulating — the reason being that absorption is an ongoing process. A 50% reduction factor cannot be applicable only once. The next year would naturally see a further reduction. And so forth.

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VINCENT GRAY ALAN SIDDONS

Average temperature vs average irradiance

Tuesday, May 6th 2008, 9:16 AM EDT

Co2sceptic (Site Admin)

The following article is from motls.blogspot (The Reference Frame) by - Vincent Gray and Alan Siddons Average temperature vs average irradiance They point out the maths of the solar irradiance problem.

Extract: -

Vincent Gray and Alan Siddons have been emphasizing an important point that the (arithmetic) average temperature is not the relevant quantity that should be substituted into various calculations of the heat and energy budget of Earth.

Why? Because what matters for the energy budget is the average radiated (or absorbed) energy. According to the Stefan-Boltzmann law, the energy radiated by a black body per unit surface area (also called "radiant emittance") is proportional to the fourth power of the absolute temperature.

When we divide the solar constant by four, to obtain 342 Watts per squared meter, we really average the irradiance over latitudes, seasons, and parts of a day. If the Earth were a black body, that would be equivalent to averaging the fourth power of the absolute temperature.