UncleJesse wrote:
It is real but the political debate is about the cause. Natural or manmade? Most scientist studying this see a direct correlation between the amount of carbon dioxide in the environment and g****l w*****g. They have evidence of the correlation. The debate occurs when the finger is pointed at sources of the carbon dioxide: burning fuel vs. some undiscovered phenomena. The debate is important because if you believe the source is manmade, the only practical solution are laws to reduce burning fuel. The technology to capture carbon dioxide from burning fuel hasn't been invented yet.
It is real but the political debate is about the c... (
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The correlation is backwards and Al Gore and his co-conspirators know that.
Carbon dioxide increased hundreds of years after the Earth warmed and CO2 levels follow temperature increases and decreases.
CO2 in the atmosphere can reduce air quality when CO2 levels are over twice what they are now. 400 ppmv vs 1000 ppmv. It would take hundreds of years at the present rate of increase to reach 1000 ppmv in the atmosphere.
Even so, that is not causing g****l w*****g. Al Gore kept the information on two separate charts rather than a single chart since it would be obvious that CO2 is not a major driver of the Earth's temperature if he put the information on a single chart. That means his lies are deliberate.
CO2 is 4/100 of 1% of Earth's atmosphere. Water vapor (clouds, duh) has a far greater impact on Earth's temperature than CO2, and that is a cooling impact by reflecting the sun's rays away from Earth more than the amount of heat that is kept from radiating into space at night by the clouds.
http://en.wikipedia.org/wiki/Atmosphere_of_Earth
This NASA site points out that clouds reflect more of the sun's radiant energy than the ground would, so clouds make the earth cooler.
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The overall effect of all clouds together is that the Earth's surface is cooler than it would be if the atmosphere had no clouds.
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The Earth's climate system constantly adjusts in a way that tends toward maintaining a balance between the energy that reaches the Earth from the sun and the energy that goes from Earth back out to space. Scientists refer to this as Earth's "radiation budget." The components of the Earth system that are important to the radiation budget are the planet's surface, atmosphere, and clouds. The energy coming from the sun to the Earth's surface is called solar energy. Most of it is in the form of radiation from the "visible" wavelengths, i.e., those responsible for the light detected by our eyes. Visible radiation and radiation with shorter wavelengths, such as ultraviolet radiation are labeled "shortwave." Both the amount of energy and the wavelengths at which energy is emitted by any system are controlled by the average temperature of the system's radiating surfaces, plus the emission properties. The temperature of the sun's radiating surface, or photosphere, is more than 5500°C (9900°F). However, not all of the sun's energy comes to Earth. The sun's energy is emitted in all directions, with only a small fraction being in the direction of the Earth.
cloud albedo
Energy goes back to space from the Earth system in two ways: reflection and emission. Part of the solar energy that comes to Earth is reflected back out to space in the same, short wavelengths in which it came to Earth. The fraction of solar energy that is reflected back to space is called the albedo. Different parts of the Earth have different albedos. For example, ocean surfaces and rain forests have low albedos, which means that they reflect only a small portion of the sun's energy. Deserts, ice, and clouds, however, have high albedos; they reflect a large portion of the sun's energy. Over the whole surface of the Earth, about 30 percent of incoming solar energy is reflected back to space. Because a cloud usually has a higher albedo than the surface beneath it, the cloud reflects more shortwave radiation back to space than the surface would in the absence of the cloud, thus leaving less solar energy available to heat the surface and atmosphere. Hence, this "cloud albedo forcing," taken by itself, tends to cause a cooling or "negative forcing" of the Earth's climate.
The Earth's climate system constantly adjusts in a... (
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At night the clouds help hold in the heat.
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Another part of the energy going to space from the Earth is the electromagnetic radiation emitted by the Earth. The solar radiation absorbed by the Earth causes the planet to heat up until it is emitting as much energy back into space as it absorbs from the sun. Because the Earth is absorbing only a tiny fraction of the sun's energy, it remains cooler than the sun, and therefore emits much less radiation. Most of this emitted radiation is at longer wavelengths than solar radiation. Unlike solar radiation, which is mostly at wavelengths visible to the human eye, the Earth's longwave radiation is mostly at infrared wavelengths, which are invisible to the human eye. When a cloud absorbs longwave radiation emitted by the Earth's surface, the cloud reemits a portion of the energy to outer space and a portion back toward the surface. The intensity of the emission from a cloud varies directly as its temperature and also depends upon several other factors, such as the cloud's thickness and the makeup of the particles that form the cloud. The top of the cloud is usually colder than the Earth's surface. Hence, if a cloud is introduced into a previously clear sky, the cold cloud top will reduce the longwave emission to space, and (disregarding the cloud albedo forcing for the moment) energy will be trapped beneath the cloud top. This trapped energy will increase the temperature of the Earth's surface and atmosphere until the longwave emission to space once again balances the incoming absorbed shortwave radiation. This process is called "cloud greenhouse forcing" and, taken by itself, tends to cause a heating or "positive forcing" of the Earth's climate. Usually, the higher a cloud is in the atmosphere, the colder is its upper surface and the greater is its cloud greenhouse forcing.
Another part of the energy going to space from the... (
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This heating effect of air on the surface, called the atmospheric greenhouse effect, is due mainly to water vapor in the air, but also is enhanced by carbon dioxide, methane, and other infrared-absorbing trace gases.
Note that the NASA site points to clouds moderating the temperature. In other words, without the moderating effect of the atmosphere, including clouds, the Earth would get extremely hot during the day and freezing at night.
It isn't hard to tell that it's cooler out under a cloud than in the sun. Clouds block more energy from the sun than they prevent from being emitted into space over night.
Here's a second link since the NASA government site may be a hostage of the Obama administration.
This EDU site agrees. PDF file.