| rdfs:comment
| - The Greenhouse Effect is a natural effect that keeps the earth warm. It is composed of greenhouse gases, such as methane, carbon dioxide, and nitrous oxide. It works by trapping the heat from the sun around the earth.
- The Greenhouse effect refers to the change in the thermal equilibrium temperature of a planet or moon by the presence of an atmosphere containing gas that absorbs infrared radiation. Greenhouse gases warm the atmosphere by efficiently absorbing thermal infrared radiation emitted by the Earth’s surface, by the atmosphere itself, and by clouds. As a result of its warmth, the atmosphere also radiates thermal infrared in all directions, including downward to the Earth’s surface. Thus, greenhouse gases trap heat within the surface-troposphere system. This mechanism is fundamentally different from the mechanism of an actual greenhouse, which instead isolates air inside the structure so that heat is not lost by convection and conduction, as discussed below. The greenhouse effect was discovered
- The greenhouse effect refers to the change in the thermal equilibrium temperature of a planet or moon by the presence of an atmosphere containing gas that absorbs and emits infrared radiation. Greenhouse gases, which include water vapor, carbon dioxide and methane, warm the atmosphere by efficiently absorbing thermal infrared radiation emitted by the Earth’s surface, by the atmosphere itself, and by clouds. As a result of its warmth, the atmosphere also radiates thermal infrared in all directions, including downward to the Earth’s surface. Thus, greenhouse gases trap heat within the surface-troposphere system. This mechanism is fundamentally different from the mechanism of an actual greenhouse, which instead isolates air inside the structure so that heat is not lost by convection and cond
- Some facts:
* Sunlight can be considered as having two parts roughly in the same proportion. Broadly the two parts are (1) the visible spectrum light and (2) the infra red rays.
* Both parts can be directly absorbed by the pot and will heat it. However, the color of the surface of the pot affects how much sunlight is absorbed, and how much is reflected.
* Black paint is good at absorbing visible light, converting its energy into heat. It is also usually good at absorbing infra-red rays. When the pot becomes hot, the black surface re-radiates energy as infra-red rays. You may have felt these invisible rays on your cheek when you walked past a stove with a burner on, or when you have stood some distance from a campfire.
* Glazing materials are transparent to visible light, but
- Greenhouse effect was the name for the process by which an atmosphere warmed a planet, like Earth. This effect could be induced or influenced by Humans, often having a negative connotation if the greenhouse effect was not natural.
- The greenhouse effect first came to the world's attention during the 1980's, when studies were released that demonstrated how global temperatures are rising due to all the sunlight reflected back into the atmosphere from the roofs of greenhouses. During the last forty years, the amount of greenhouses on earth has increased dramatically, from around 10 to 458,231,345.00 billion.
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| abstract
| - Greenhouse effect was the name for the process by which an atmosphere warmed a planet, like Earth. This effect could be induced or influenced by Humans, often having a negative connotation if the greenhouse effect was not natural. For years, the colonists on Penthara IV tried to avoid anything that would create a greenhouse effect. When the planet was hit by a type C asteroid in 2368 however, a greenhouse effect was the only thing that could save the colony from freezing. By boring holes into subterranean caverns filled with carbon dioxide and thereby releasing the gas into the atmosphere, the cooling down could be postponed for some time, giving the planet time to mend itself. (TNG: "A Matter of Time" )
- The Greenhouse effect refers to the change in the thermal equilibrium temperature of a planet or moon by the presence of an atmosphere containing gas that absorbs infrared radiation. Greenhouse gases warm the atmosphere by efficiently absorbing thermal infrared radiation emitted by the Earth’s surface, by the atmosphere itself, and by clouds. As a result of its warmth, the atmosphere also radiates thermal infrared in all directions, including downward to the Earth’s surface. Thus, greenhouse gases trap heat within the surface-troposphere system. This mechanism is fundamentally different from the mechanism of an actual greenhouse, which instead isolates air inside the structure so that heat is not lost by convection and conduction, as discussed below. The greenhouse effect was discovered by Joseph Fourier in 1824, first reliably experimented on by John Tyndall in the year 1858 and first reported quantitatively by Svante Arrhenius in his 1896 paper. In the absence of the greenhouse effect, the Earth's average surface temperature of 14 °C (57 °F) would be about -18 °C (–0.4 °F), the Black body temperature of the Earth . Anthropogenic Global warming (AGW), a recent warming of the Earth's lower atmosphere as evidenced by the global mean temperature anomaly trend , is believed to be the result of an "enhanced greenhouse effect" mainly due to human-produced increased concentrations of greenhouse gases in the atmosphere and changes in the use of land. The greenhouse effect is only one of many factors which affect the temperature of the Earth. Other positive and negative feedbacks dampen or amplify the greenhouse effect. In our solar system, Mars, Venus, and the moon Titan also exhibit significant greenhouse effects. The greenhouse effect causes more hurricanes to form, which are strong storms.
- Some facts:
* Sunlight can be considered as having two parts roughly in the same proportion. Broadly the two parts are (1) the visible spectrum light and (2) the infra red rays.
* Both parts can be directly absorbed by the pot and will heat it. However, the color of the surface of the pot affects how much sunlight is absorbed, and how much is reflected.
* Black paint is good at absorbing visible light, converting its energy into heat. It is also usually good at absorbing infra-red rays. When the pot becomes hot, the black surface re-radiates energy as infra-red rays. You may have felt these invisible rays on your cheek when you walked past a stove with a burner on, or when you have stood some distance from a campfire.
* Glazing materials are transparent to visible light, but fairly opaque to infra-red, especially "far" infra-red, which has wavelengths far from the visible spectrum. When they are hot, these materials radiate infra-red energy.
* Some approximate calculations: Suppose the intensity of sunlight which strikes the glazing is represented by 2x, of which x is visible and the other x is i-r (infra-red). For the cooker to be in equilibrium, the glazing must be hot enough to radiate 2x outward. By symmetry, it also radiates 2x inward, to the pot. The pot therefore receives 2x of i-r, and also x of visible light which has passed unaffected through the glazing. To be in equilibrium, the pot must therefore radiate 3x of i-r outward. (Thus the glazing absorbs x in i-r from the sun, and 3x from the pot. This balances the 2x that it radiates in both directions.) If the glazing were not present, the pot would radiate 2x outward, to be in equilibrium with incoming sunlight. Thus the effect of the glazing is to raise the temperature of the pot so it radiates 50% more than if the glazing were not present. By the fourth-power law of radiation, the pot's temperature measured from absolute zero is raised by about ten percent, since . At typical solar-cooking temperatures, this means that the glazing raises the temperature of the pot by about 35 °C (95 °F). This is enough to make a large difference to the effectiveness of the cooker.
- The greenhouse effect first came to the world's attention during the 1980's, when studies were released that demonstrated how global temperatures are rising due to all the sunlight reflected back into the atmosphere from the roofs of greenhouses. During the last forty years, the amount of greenhouses on earth has increased dramatically, from around 10 to 458,231,345.00 billion. Campaigners have been lobbying for the removal of greenhouses and their replacement by sheds. Sufferers argue that a shed is just not the same - claiming that there is a certain melancholy about the shed which the greenhouse entirely lacks. Governments also resist the pressure, insisting that the right to potter about in a greenhouse is essential to all human happiness. The fact that many sufferers of the greenhouse effect are themselves government members is usually hushed up in the mainstream media.
- The Greenhouse Effect is a natural effect that keeps the earth warm. It is composed of greenhouse gases, such as methane, carbon dioxide, and nitrous oxide. It works by trapping the heat from the sun around the earth.
- The greenhouse effect refers to the change in the thermal equilibrium temperature of a planet or moon by the presence of an atmosphere containing gas that absorbs and emits infrared radiation. Greenhouse gases, which include water vapor, carbon dioxide and methane, warm the atmosphere by efficiently absorbing thermal infrared radiation emitted by the Earth’s surface, by the atmosphere itself, and by clouds. As a result of its warmth, the atmosphere also radiates thermal infrared in all directions, including downward to the Earth’s surface. Thus, greenhouse gases trap heat within the surface-troposphere system. This mechanism is fundamentally different from the mechanism of an actual greenhouse, which instead isolates air inside the structure so that heat is not lost by convection and conduction, as discussed below. The greenhouse effect was discovered by Joseph Fourier in 1824, first reliably experimented on by John Tyndall in the year 1858 and first reported quantitatively by Svante Arrhenius in his 1896 paper. In the absence of the greenhouse effect and an atmosphere, the Earth's average surface temperature of 14 °C (57 °F) could be as low as −18 °C (−0.4 °F), the black body temperature of the Earth. Anthropogenic global warming (AGW), a recent warming of the Earth's lower atmosphere as evidenced by the global mean temperature anomaly trend , is believed to be the result of an "enhanced greenhouse effect" mainly due to human-produced increased concentrations of greenhouse gases in the atmosphere and changes in the use of land. The greenhouse effect is one of several factors which affect the temperature of the Earth. Other positive and negative feedbacks dampen or amplify the greenhouse effect. In our solar system, Mars, Venus, and the moon Titan also exhibit greenhouse effects according to their respective environments. In addition, Titan has an anti-greenhouse effect and Pluto exhibits behavior similar to the anti-greenhouse effect.
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