![](https://webarchive.library.unt.edu/eot2008/20081004064114im_/http://veimages.gsfc.nasa.gov//11542/dec2000_web.thumb.png)
Images & Animations
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Credit
NASA/Goddard Space Flight Center Scientific Visualization Studio
Erythemal Index for August 2000 through July 2001: North and South America (With Dates)
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.
December, 2000
Metadata
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Sensor
TOMS/TOMS -
Animation ID
2225 -
Video ID
SVS2001-0020 -
Start Timecode
01:13:14:00 -
End Timecode
01:13:23:00 -
Animator
Michael Mangos -
Studio
SVS -
Visualization Date
2001/06/25 -
Scientist
Richard McPeters (NASA/GSFC) -
Keywords
Erythemal -
DLESE Subject
Atmospheric science -
Data Date
2000/08/01-2001/07/31 -
Animation Type
Regular