Inventions and Deceptions – The Greenhouse Effect

The mythical Greenhouse Effect as defined by Wikipedia:

The greenhouse effect is a process by which thermal radiation from a planetary surface is absorbed by atmospheric greenhouse gases, and is re-radiated in all directions. Since part of this re-radiation is back towards the surface and the lower atmosphere, it results in an elevation of the average surface temperature above what it would be in the absence of the gases.

Firstly, to understand the physics behind this definition it is important to remind ourselves of the Second Law of Thermodynamics which basically states that “heat can never pass from a colder to a warmer body”

Clausius statement
The German scientist Rudolf Clausius laid the foundation for the second law of thermodynamics in 1850 by examining the relation between heat transfer and work. His formulation of the second law, which was published in German in 1854, is known as the Clausius statement:

“Heat can never pass from a colder to a warmer body without some other change, connected therewith, occurring at the same time.”

This may be restated as

“No process is possible whose sole result is the transfer of heat from a body of lower temperature to a body of higher temperature.”

Heat cannot spontaneously flow from cold regions to hot regions without external work being performed on the system, which is evident from ordinary experience of refrigeration, for example. In a refrigerator, heat flows from cold to hot, but only when forced by an external agent, the refrigeration system.

Rudolf Julius Emanuel Clausius 1822 – 1888

Secondly, it is important to remind ourselves that up to 100 kilometres the air temperatures are below the Earth’s surface air temperature. Therefore, the colder air [up to 100 kilometres] cannot transfer heat down to the warmer surface air.

Temperature decreases with altitude starting at sea level, but variations in this trend begin above 11 km, where the temperature stabilizes through a large vertical distance through the rest of the troposphere. In the stratosphere, starting above about 20 km, the temperature increases with height, due to heating within the ozone layer caused by capture of significant ultraviolet radiation from the Sun by the dioxygen and ozone gas in this region. Still another region of increasing temperature with altitude occurs at very high altitudes, in the aptly-named thermosphere above 90 km.’s_atmosphere

The myth of the Greenhouse Effect was first used to explain the warming effect encountered in glass greenhouses. However, the reality is that the glass roof of the greenhouse simply traps warm air [heated by the sun] and prevents it from escaping.

Like anything else, the interior surfaces of a greenhouse warm up by absorbing sunlight. But what the glass enclosure then does is trap the surface-heated air, acting as a physically rigid barrier to convective heat dissipation.
This is why a greenhouse gets warmer than the outside air.

This fact can be verified by alternately opening two small panels of the greenhouse: first, open a wall panel at ground level. No significant temperature decrease will be observed.
Next, open a roof panel; the temperature will drop noticeably and quickly.

Now, if trapped radiation were involved, radiation would escape equally well from either the base or the top when an escape hatch appears. The fact that the greenhouse only cools when a roof panel is opened indicates that the increased warmth comes about only because heated air has been trapped.

A Discussion on the Absence of a Measurable Greenhouse Effect
Joseph E Postma, M.Sc. Astronomy – October 22, 2012

The myth of the Greenhouse Effect has been employed by climate activists and alarmists to invent [mythical] Man-made Global Warming [aka Catastrophic Climate Change] by designating Carbon Dioxide [CO2] as a “greenhouse gas” that heats the Earth via [mythical] back-radiation.

If back-radiation [via CO2] was a reality then the “greenhouse gases” would cause higher surface temperatures than those directly attributable to real-time insolation. Unfortunately [for the alarmists] it has been clearly demonstrated that this additional surface heating is NOT a reality.

A Discussion on the Absence of a Measurable Greenhouse Effect
Joseph E Postma, M.Sc. Astronomy – October 22, 2012

If back-radiation [via CO2] was a reality then the USA would be experiencing higher surface temperatures – but they are not:

US Temperatures versus CO2

Gallery | This entry was posted in Atmospheric Science, Earth, Inventions and Deceptions, Science. Bookmark the permalink.

One Response to Inventions and Deceptions – The Greenhouse Effect

  1. Pingback: Greenhouse Effect – Reality Check | MalagaBay

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