Erythemal Index for August 2000 through July 2001: North and South America (With Dates)
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The Erythemal Index is a measure of ultraviolet radiation (UV) at ground level on the Earth. UV exists to the left of the visible spectrum and is divided into three components (UV-A, UV-B and UV-C). UV-B (290-320 wavelengths) is the most dangerous form of UV radiation that can reach ground level. Atmospheric ozone shields life at the surface from most of the harmful components of solar radiation. Chemical processes in the atmosphere can effect the level of protection provided by the ozone in the upper atmosphere. This thinning of the atmospheric ozone in the stratosphere leads to elevated levels of UV-B at ground level and increases the risks of DNA damage in living organisms.
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This erythemal index for North and South America shows the range of ground levels of UV radiation from the highest (in red) to the lowest (in purple). This animation shows the fluctuation with the red areas moving from the equatorial region, Southward, then back to the middle as time passes from August, 2000 to July, 2001.
Duration: 1.0 seconds
Available formats:
320x240 (30 fps)
MPEG-1
214 KB
160x80
PNG
22 KB
80x40
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6 KB
320x240
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10 KB
How to play our movies
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April, 2001
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303 KB
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14 KB
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August, 2000
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308 KB
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13 KB
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December, 2000
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279 KB
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13 KB
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February, 2001
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284 KB
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13 KB
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January, 2001
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276 KB
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13 KB
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July, 2001
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314 KB
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14 KB
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June, 2001
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309 KB
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14 KB
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March, 2001
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293 KB
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13 KB
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May, 2001
Available formats:
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313 KB
320 x 216
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14 KB
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November, 2000
Available formats:
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286 KB
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13 KB
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October, 2000
Available formats:
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299 KB
320 x 216
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13 KB
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September, 2000
Available formats:
720 x 486
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303 KB
320 x 216
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14 KB
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| Animation Number: | 2225 |
| Animator: | Michael Mangos (Lead) |
| Studio: | SVS |
| Completed: | 2001-06-25 |
| Scientist: | Richard McPeters (NASA/GSFC) |
| Instrument: | Earth Probe/TOMS |
| Data Collected: | 2000/08/01-2001/07/31 |
| Series: | Erythemal UV |
| Video: | SVS2001-0020 * |
Keywords:
DLESE
>> Atmospheric science
SVS
>> Erythemal
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Please give credit for this item to
NASA/Goddard Space Flight Center
Scientific Visualization Studio |
*Please note: the SVS does not fulfill requests for copies of the tapes in our library. On some of our animation pages, there is a direct link to a video distribution service from which tapes, handled by the Public Affairs Office (PAO)/Goddard TV, including some of our animations may be ordered. General information on this service can be found here. |
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