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| - The Earth's atmosphere is a layer of gases surrounding the planet Earth and retained by the Earth's gravity. It contains roughly (by molar content/volume) 78.08% nitrogen, 20.95% oxygen, 0.93% argon, 0.038% carbon dioxide, trace amounts of other gases, and a variable amount (average around 1%) of water vapor. This mixture of gases is commonly known as air. The atmosphere protects life on Earth by absorbing ultraviolet solar radiation and reducing temperature extremes between day and night.
- Chemical compounds found in the air during Isaac Newton's Era Per the chart above all compounds during Newton's Era were hardly hospitable or welcoming to the people of that era. Now with modern technology it has been replaced with NASA's earth dome program.
- The Earth's atmosphere (or air) is a layer of gases surrounding the planet Earth that is retained by the Earth's gravity. Dry air contains roughly (by volume) 78.08% nitrogen, 20.95% oxygen, 0.93% argon, 0.038% carbon dioxide, and trace amounts of other gases. Air also contains a variable amount of water vapor, on average around 1%. The atmosphere protects life on Earth by absorbing ultraviolet solar radiation, warming the surface through heat retention (greenhouse effect), and reducing temperature extremes between day and night.
- The Earth's atmosphere is a layer of gases surrounding the planet Earth that is retained by the Earth's gravity. Dry air contains roughly (by molar content – equivalent to volume, for gases) 78.08% nitrogen, 20.95% oxygen, 0.93% argon, 0.038% carbon dioxide, and trace amounts of other gases; but air also contains a variable amount of water vapor, on average around 1%. This mixture of gases is commonly known as air. The atmosphere protects life on Earth by absorbing ultraviolet solar radiation, warming the surface through heat retention (greenhouse effect), and reducing temperature extremes between day and night.
- Global warming is an increase over time of the average temperature of Earth's atmosphere and oceans. Global warming theories attempt to account for the documented rise in average global temperatures since the late 19th century (0.6 ± 0.2°C) [1] and assess the extent to which the effects are due to human causes, principally emissions of carbon dioxide (CO2) increasing the "greenhouse effect." All climate models currently predict that if the only variable considered is human emission of greenhouse gases, then this will cause temperatures to increase in the future; however the precise magnitude of these increases is still uncertain.
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| abstract
| - Global warming is an increase over time of the average temperature of Earth's atmosphere and oceans. Global warming theories attempt to account for the documented rise in average global temperatures since the late 19th century (0.6 ± 0.2°C) [1] and assess the extent to which the effects are due to human causes, principally emissions of carbon dioxide (CO2) increasing the "greenhouse effect." All climate models currently predict that if the only variable considered is human emission of greenhouse gases, then this will cause temperatures to increase in the future; however the precise magnitude of these increases is still uncertain. Use of the term "global warming" generally implies a human influence — the more neutral term climate change is usually used for a change in climate with no presumption as to cause and no characterization of the kind of change involved; these are the senses in which the terms are used in wikipedia. Note, however, that there is one important exception to this: the UNFCCC defines "climate change" as anthropogenic [2]. Sometimes the term "anthropogenic climate change" is used to indicate the presumption of human influence. The Kyoto Protocol proposes binding greenhouse gas limits for developed countries. Note that although the discussion often focusses on temperature, global warming or any climate change implies changes in other variables: overall precipitation and its patterns, cloud cover, weather, and all the other elements of our atmospheric system will be impacted by the increase in "radiative forcing" due to human changes in greenhouse gas concentrations in the atmosphere. Possible explanations for observations of global warming are discussed in attribution of recent climate change.
- The Earth's atmosphere is a layer of gases surrounding the planet Earth and retained by the Earth's gravity. It contains roughly (by molar content/volume) 78.08% nitrogen, 20.95% oxygen, 0.93% argon, 0.038% carbon dioxide, trace amounts of other gases, and a variable amount (average around 1%) of water vapor. This mixture of gases is commonly known as air. The atmosphere protects life on Earth by absorbing ultraviolet solar radiation and reducing temperature extremes between day and night.
- Chemical compounds found in the air during Isaac Newton's Era Per the chart above all compounds during Newton's Era were hardly hospitable or welcoming to the people of that era. Now with modern technology it has been replaced with NASA's earth dome program.
- The Earth's atmosphere (or air) is a layer of gases surrounding the planet Earth that is retained by the Earth's gravity. Dry air contains roughly (by volume) 78.08% nitrogen, 20.95% oxygen, 0.93% argon, 0.038% carbon dioxide, and trace amounts of other gases. Air also contains a variable amount of water vapor, on average around 1%. The atmosphere protects life on Earth by absorbing ultraviolet solar radiation, warming the surface through heat retention (greenhouse effect), and reducing temperature extremes between day and night. There is no definite boundary between the atmosphere and outer space. It slowly becomes thinner and fades into space. An altitude of marks the boundary where atmospheric effects become noticeable during reentry. The Kármán line, at , is also frequently regarded as the boundary between atmosphere and outer space. Three quarters of the atmosphere's mass is within of the surface.
- The Earth's atmosphere is a layer of gases surrounding the planet Earth that is retained by the Earth's gravity. Dry air contains roughly (by molar content – equivalent to volume, for gases) 78.08% nitrogen, 20.95% oxygen, 0.93% argon, 0.038% carbon dioxide, and trace amounts of other gases; but air also contains a variable amount of water vapor, on average around 1%. This mixture of gases is commonly known as air. The atmosphere protects life on Earth by absorbing ultraviolet solar radiation, warming the surface through heat retention (greenhouse effect), and reducing temperature extremes between day and night. There is no definite boundary between the atmosphere and outer space. It slowly becomes thinner and fades into space. Three quarters of the atmosphere's mass is within 11 km of the planetary surface. An altitude of 120 km (~75 miles or 400,000 ft) marks the boundary where atmospheric effects become noticeable during re-entry. The Kármán line, at 100 km (62 miles or 328,000 ft), is also frequently regarded as the boundary between atmosphere and outer space.
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![[RDF Data]](/fct/images/sw-rdf-blue.png)