Articles Tagged "Alan Siddons"
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Saturday, January 31st 2009, 5:18 AM EST
Just to bring you up to pace, have a look at the "panic" and "anxiety" in this AGW media report from the Washington Post by Juliet Eilperin. She wants her readers to read comments from NOAA senior scientist Susan Solomon. You can see why so many people are taken in with this sort of statement, and believe it or not Susan is talking about CO2.....(can someone send for a psychiatrist!)
"I think you have to think about this stuff as more like nuclear waste than acid rain: The more we add, the worse off we'll be," NOAA senior scientist Susan Solomon told reporters in a conference call. "The more time that we take to make decisions about carbon dioxide, the more irreversible climate change we'll be locked into.
Updated below with Comments from Alan Siddons & Hans Schreuder
Thursday, January 22nd 2009, 2:02 AM EST
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
Wednesday, January 14th 2009, 4:01 AM EST
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
Tuesday, January 13th 2009, 2:18 PM EST
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
Thursday, January 8th 2009, 12:19 PM EST
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.
Wednesday, January 7th 2009, 12:39 PM EST
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
Monday, January 5th 2009, 3:35 AM EST
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.
To see a world in a grain of sand... - William Blake
Saturday, August 30th 2008, 6:02 AM EDT
Proof that anthropogenic CO2 is not accumulating
by Alan Siddons
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.
Tuesday, May 6th 2008, 9:16 AM EDT
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.
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.