Daily Erythemal Index over the United States for July 2001 (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.
View of the United States with red (showing high levels of ground level ultraviolet radiation) covering the Western US and then changing to splotchy yellows, greens and blues as you move East (denoting lower levels of ground level ultraviolet radiation). Daily data is presented for July 1, 2001 through August 2, 2001.
August 1, 2001
August 2, 2001
July 1, 2001
July 2, 2001
July 3, 2001
July 4, 2001
July 5, 2001
July 6, 2001
July 7, 2001
July 8, 2001
July 9, 2001
July 10, 2001
July 11, 2001
July 12, 2001
July 13, 2001
July 14, 2001
July 15, 2001
July 16, 2001
July 17, 2001
July 18, 2001
July 19, 2001
July 20, 2001
July 21, 2001
July 22, 2001
July 23, 2001
July 24, 2001
July 25, 2001
July 26, 2001
July 27, 2001
July 28, 2001
July 29, 2001
July 30, 2001
July 31, 2001
Credits
Please give credit for this item to:
NASA/Goddard Space Flight Center
Scientific Visualization Studio
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Animator
- Michael Mangos (Global Science and Technology, Inc.)
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Scientist
- Richard McPeters (NASA/GSFC)
Release date
This page was originally published on Wednesday, August 8, 2001.
This page was last updated on Wednesday, May 3, 2023 at 1:57 PM EDT.
Series
This visualization can be found in the following series:Datasets used in this visualization
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[Earth Probe: TOMS]
ID: 17
Note: While we identify the data sets used in these visualizations, we do not store any further details, nor the data sets themselves on our site.