Daily Erythemal Index Over United States (July 2001)

  • Credit

    NASA/Goddard Space Flight Center Scientific Visualization Studio

Daily Erythemal Index over the United States for July 2001

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.

July 31, 2001

Metadata

  • Sensor

    TOMS/TOMS

  • Animation ID

    2216

  • Video ID

    SVS2001-0020

  • Start Timecode

    01:09:25:00

  • End Timecode

    01:10:11:10

  • Animator

    Michael Mangos

  • Studio

    SVS

  • Visualization Date

    2001/08/08

  • Scientist

    Richard McPeters (NASA/GSFC)

  • Keywords

    UV, UV-B, Erythemal, Solar Radiation, Ultraviolet

  • DLESE Subject

    Atmospheric science

  • Data Date

    2001/07/01-2001/08/02

  • Animation Type

    Regular