File:Ozone_altitude_UV_graph.jpg
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Ozone_altitude_UV_graph.jpg (504 × 380像素,文件大小:42 KB,MIME类型:image/jpeg)
摘要
描述Ozone altitude UV graph.jpg |
Levels of ozone at various altitudes, and related blocking of several types of ultraviolet radiation. The ozone concentrations shown are very small, typically only a few molecules O3 per million molecules of air. But these ozone molecules are vitally important to life because they absorb the biologically harmful ultraviolet radiation from the Sun. There are three different types of ultraviolet (UV) radiation, based on the wavelength of the radiation. These are referred to as UV-a, UV-b, and UV-c. The figure also shows how far into the atmosphere each of these three types of UV radiation penetrates. We see that UV-c (red) is entirely screened out by ozone around 35 km altitude. On the other hand, we see that most UV-a (blue) reaches the surface, but it is not as genetically damaging, so we don't worry about it too much. It is the UV-b (green) radiation that can cause sunburn and that can also cause genetic damage, resulting in things like skin cancer, if exposure to it is prolonged. Ozone screens out most UV-b, but some reaches the surface. Were the ozone layer to decrease, more UV-b radiation would reach the surface, causing increased genetic damage to living things. |
日期 | 未知日期 |
来源 | [1] |
作者 | NASA |
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本文件完全由NASA创作,在美国属于公有领域。根据NASA的版权方针,NASA的材料除非另有声明否则不受版权保护。(参见Template:PD-USGov/zh、NASA版权方针页面或JPL图片使用方针。) | ![]() |
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原始上传日志
原始描述頁面位於這裡。下列使用者名稱均來自en.wikipedia。
date/time | username | edit summary |
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20:23, 23 March 2006 | en:User:Kilo-Lima | (sub) |
07:39, 14 April 2005 | en:User:SEWilco | (More text) |
07:31, 14 April 2005 | en:User:SEWilco | (Levels of <a href="/wiki/Ozone" title="Ozone">ozone</a> at various altitudes, and related blocking YAY! of several types of <a href="/wiki/Ultraviolet_radiation" title="Ultraviolet radiation">ultraviolet radiation</a>. == Source == {{PD-USGov-NASA}} <a href="/wiki/NASA" title="NASA">NASA</a>. ''Studying Earth's Environment From Space''. <a href="/wiki/June_2000" title="June 2000">June 2000</a>. (<a href="/wiki/April_14" title="April 14">April 14</a> <a href="/wiki/2005" title="2005">2005</a>) http://www.ccpo.od) |
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当前 | 2006年5月4日 (四) 15:38 | ![]() | 504 × 380(42 KB) | Elch~commonswiki | Levels of ozone at various altitudes, and related blocking of several types of ultraviolet radiation. The ozone concentrations shown are very small, typically only a few molecules O<sub>3</sub> per million molecules of air. But these ozone molecu |
2006年4月1日 (六) 07:56 | ![]() | 504 × 380(42 KB) | Maksim | La bildo estas kopiita de wikipedia:en. La originala priskribo estas: Levels of ozone at various altitudes, and related blocking of several types of ultraviolet radiation. The ozone concentrations shown are very small, typically only a few molec |
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