The main reason for the existence of climatic regions on our planet is the tilting of the Earth's vertical axes and the elliptic rotation of the Earth around the sun. This causes the amount of incoming solar radiation to vary throughout a year. As a result we have four seasons each lasting around 90 days. For a seasonal overview see this extra terrestrial irradiation image (opens in a new window).
As said, the orbit of the Earth around the sun is not a perfect circle, this too is causing variations in the seasons and weather. It is more like an elliptical and during January the Earth is closest to the sun (perihelion). And even this ellipse is also not stable causing more changes in the incoming solar radiation (insolation).
Also variations in the output of the sun (energy) will too have an effect on our climate in the long term.
In this text, and the previous article, we will delve a bit deeper to understand the result of all these variables and we will see the effects on our climate realizing that real climate science can never be settled as we learn more and more each day.
Our atmosphere consists of a layer of gases surrounding our planet and it is kept there solely by its gravity caused by the Earth's magnetic field. It contains some 78 % Nitrogen, 21 % Oxygen, 0,93 % Argon, 0,04 % Carbon Dioxide (CO2), minute amounts of other gases and a variable amount (on average between 0-4 %) of water vapor (resulting in clouds and rain). This complete mixture is known to us as air.
Wikipedia: "Existence of the greenhouse effect as such is not disputed. Naturally occurring greenhouse gases have a mean warming effect of about 33 °C (59 °F), without which Earth would be uninhabitable".
Well maybe, I would say that daily exposure to the sun due to the rotation of the planet keeps us warm in combination with 70% of the surface being water (stabilizing the warmth), controls the climate more than you think. Any gas in the atmosphere only just serves to slow down the infrared radiation from the earth back into the cold space.
In fact: The Earth is not a greenhouse. It is always in the process of absorbing and discharging heat via the atmosphere and the oceans. If it retained heat all life on Earth would die. Even on a hot summer’s day, it will cool at night. Deserts, too, are often cooler at night. As for carbon dioxide, it is a trace gas in the atmosphere at barely 0,04%, but it is also the gas which all vegetation requires. In turn, vegetation gives off oxygen while we humans and other animals exhale carbon dioxide.
"In our open-to-space atmosphere, the excellent radiating properties of all so-called "greenhouse gases" serve to cool the atmosphere, never to warm it. Any and all gases in our atmosphere cool the planet, either by absorbing solar radiation on its way to the surface or by taking energy away from the surface but at no stage can any gas add energy. In reality, it is the oxygen and nitrogen that act as "greenhouse gases" – they retain heat much longer than the gases now labeled such." (Source: Hans Schreuder, Final Analysis: Climate Change – Man-made or not? ). There seems to be some merit to his research.
The same happens on a cloudy day, it just stays cooler and seemingly warmer at night. But if the cloudiness continues for days it will eventually cool off due to the lack of incoming energy from the sun. So water vapor controls the temperature more than any trace gas.
To suggest, however, that climate change is influenced by too much carbon dioxide lacks all scientific merit. There simply isn’t enough CO2 in the Earth's atmosphere to have any impact and levels have been higher without higher temperatures in the past. Scientific research (source: Professor Murry Salby, Chair of Climate Science at Macquarie University.) has proven that CO2 levels follow temperature change than the other way around. The same effect can be seen with warm air, this can contain more water vapor than cold air. It has also been shown that CO2 increases are logaritmic, see image, read more in the article from CO2isLife here.
An excellent presentation from Prof. Salby can be seen in the next YouTube video: Atmospheric Carbon, 18 July 2016, University College London . In this presentation he debunks, in a very clear way, the premise that antropogenic CO2 causes climate change once and for all.
In ScienceDaily (July 29, 2011) Dr. Spencer concedes, "The satellite observations suggest there is much more energy lost to space during and after warming than the climate models show. There is a huge discrepancy between the data and the forecasts that is especially big over the oceans." The second law of thermodynamics would explain this.
The Intergovernmental Panel on CLimate Change has used a number of computer models which have tried to project the climate in the future. After a number of years it seemed that they were completely wrong and that actual observations showed something completely different. See the image to the right and move your mouse over for more detail.
A very nice presentation on the relative amounts of carbon dioxide, methane and water in our atmosphere can be seen in this YouTube video on 'CO2 contributed by human activity by 1ElisaPardo', click here .