American university studies of solar ovens has produced a surprising result: a challenge to the global warming theory.
Colorado State University and Brigham Young University's (BYU) Professor Steven E. Jones of the Department of Physics and Astronomy and his student, Jenni Christensen Currit, have conducted experiments that prove that solar ovens are not just a cheap and reliable way of ‘free energy’ cooking but are also useful tools for disputing theories that the planet is in danger of any runaway catastrophic warming due to fossil fuel emissions.
BYU's study entitled, ‘Solar Cookers for Developing Countries’ shows that the predicted harmful back radiation effect defined by the greenhouse gas theory (GHG), whereby carbon dioxide in the atmosphere is supposedly responsible for re-radiating heat energy (repeatedly up and down as if under a blanket) doesn’t exist in the real world.
The finding challenges the Intergovernmental Panel on Climate Change and certain world governments who have premised trillion-dollar cap-and-trade tax policies on fears that catastrophic global warming may ensue if levels of atmospheric carbon dioxide continue to rise.
Cooling or Warming: Ovens Satisfy Laws of Thermodynamics
Remarkably, the researchers doing a similar experiment at Colorado State University tested solar ovens not just as cookers but also for their potential to cool food and water both day and night. All solar cookers tested proved highly successful at cooling both day and night as long as they were carefully aimed.
It has been shown that at night when the temperature is within 6 °C or 10°F of freezing, nighttime cooling could be used to create ice. Previous tests (in the autumn and with less water) achieved ice formation by 8 a.m. when the minimum ambient night-time temperature was about 48 °F."
Such experiments have proved that solar ovens will produce ice when the ambient air temp is +6 deg C and this occurs when solar cookers are aimed away from buildings, and trees.
It is proof of a cooling effect that appears to contradict the so-called re-radiation properties of carbon dioxide; if CO2 does cause warming it isn’t showing up in these tests. This is because if back radiation was actually reaching the Earth, solar ovens would produce heating at night. But clearly they are not. The findings are set to become a hot topic in the ongoing global warming debate.
Cooling occurs because all bodies emit thermal radiation by virtue of their temperature. So the heat should be radiated outward in accordance with the second law of thermodynamics which states that heat will flow naturally from a hot object to a cold object.
Less Cooling Noted During Day Time
However, it was found there existed a discrepancy between the night time and daytime effectiveness of oven cooling.
One possible reason that daytime cooling was not greater has to do with the different types of solar radiation. There are two kinds of solar radiation; direct and diffuse. Direct radiation is the portion of light that appears to come straight from the Sun. Only direct radiation can be focused. Diffuse radiation is sunlight that appears to come from all over the sky.
Thereby, indirect atmospheric radiation is so weak that the so-called intensifying ‘greenhouse effect’ cannot practically occur in the real world. This accord with the Stephan-Boltzmann Law that affirms "Objects that absorb energy will increase in temperature and radiate all the energy it absorbed"
Most likely, our planet has successfully operated this cooling mechanism for billions of years. Thus, it is more conceivable that atmospheric gases are nature’s coolants.
Solar Ovens Used Widely In Under-developed Societies
Solar ovens are commonly used in the hard-pressed Third-World in over 50 countries including India, China, Peru, the Philippines, Guatemala, Sierra Leone, Indonesia, and many others. They work simply and reliably by collecting the energy of the Sun and focusing solar radiation into a highly polished curved metallic surface in order to boil water or cook food.
The two countries with the largest known use of solar cookers is China with 100,000 and India with 500,000.
No Evidence of any Back Radiation Effect
It is this failure to detect any warming effect that suggests so-called back radiation from CO2 isn’t happening, contrary to the predictions of government climatologists.
It was this feared back-radiation effect that certain western governments had predicted was the greatest danger for our planet's future. Alongside the mainstream media, politicians have touted runaway global warming as a consequence of further human emissions of GHG. The solution proposed by environmental lobbyists was to levy taxes to help cut fossil fuel emissions from increased worldwide industrial production and our modern way of living.
But without evidence of physically provable back-radiation the greenhouse effect appears to be in question, and the need for tax hikes is likewise questionable.
Tombstone Evidence Supports University Results
But there is more evidence to support the Brigham Young findings and its data coming from weather station evidence at Tombstone, in the desert of southern Arizona, southeast of Tucson where NOAA has moved its measuring apparatus in 1970.
The year is significant, as explained below, because it allows us to observe the difference of this station’s historical temperature record by observing the effects made on it between the older and newer sites and pre- and post-1970.
The date 1970 matters because IPCC climate models only require the addition of anthropogenic CO2 after 1970 – prior to that the warming is explained with natural forcings.
Thus, if the greenhouse gas theory holds true then the effect of increasing CO2 as a greenhouse gas in the desert should be most noticeable at night when the Earth is radiating heat.
But if we compare graphs found here of the station data for pre- and post-1970 it tells us, contrary to predictions, that there has been no warming in the Tombstone minimum temperature during the “CO2 era”.
Greenhouse Gas Skeptics Vindicated
Theorists skeptical of the GHG theory argue that such evidence shows that greenhouse gases have no obvious and measurable impact on temperatures. They say the sky and upper atmosphere will always be at a lower temperature so that heat will, in turn, always be readily transferred away from the warmer ground (and solar oven) to the cooler sky, which possesses an average high-atmosphere temperature of approximately -20 °C.
A growing number of scientists are critical of the GHG theory, most notably recently have been Dr. Richard F. Yanda, Alan Siddons and Heinz Thieme. While over 130 German scientists have declared that global warming has become a “pseudo religion” and rising CO2 has “had no measurable effect” on temperatures. Siddons believes the GHG theory is disproved because, " Re-radiated energy is neither reflected nor absorbed by a surface."
Thus these university experiments have inadvertently added weight to the debate proving that any heat created, just like the cooking vessel, will always be radiated from Earth to the outer atmosphere and then to space because of this unique cooling property of ‘greenhouse’ gases.
'A physics experiment at Colorado State University,' littleshop.physics.colostate.edu/docs/ (accessed online June 29, 2010).
Prof. Jones, S.E., & Currit, J.C., ‘Solar Cookers for Developing Countries’ Department of Physics and Astronomy, Brigham Young University (accessed online: June 29, 2010).
Jones, S.E., “The Solar Funnel Cooker,” courtesy of Solar Cookers International, solarcooking.org (2001).
Dr. Yanda, R. F.,'The Greenhouse Effect: Incorrect Science,' (June 29, 2010) Climate Realists.com, accessed online: June 29, 2010‘Tombstone – No Evidence of CO2 Warming,’ Global Warming Science, (June 28, 2010); accessed online June 30, 2010).