Since the 1970s, ozone high in the
atmosphere has been decreasing. This allows more UV
solar radiation to reach the earth's surface. The
effects of increased UV radiation are not well
understood. Several agencies and universities are
studying links between UV radiation exposure and skin
cancer and eye disorders in humans. UV radiation also
has negative effects on plants and aquatic
ecosystems.
UV radiation may also influence air quality in the
parks. The smog obscuring park views is the result of
chemical reactions that take place in the presence of
sunlight. More UV radiation may speed up these
chemical reactions and could increase the amount of
smog and low-altitude ozone present.
SEKI is one of fourteen national parks monitoring UV
radiation as part of a UV radiation network sponsored
by the Environmental Protection Agency and the
National Park Service. The network data are used for
a variety of scientific studies including assessments
of the effects of UV radiation on frog populations.
Ultraviolet Radiation Links
SEKI
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