The minimum value of total ozone in the ozone
hole was the second highest level in two decades.
For two decades, an ominous hole in the ozone
layer has ballooned over Antarctica, alarming scientists.
This also means that the seasonal holes in the ozone
layer over the Arctic and Antarctic would represent nothing more than normal fluctuations in the ozone
The ring design of the annulus test piece (inside diameter exactly 1/2 the outside diameter) allows a continuous range of strain observations (0 to 100%) when the test piece is mounted in the ozone
test chamber apparatus.
EPRI's involvement in the ozone
issue stems from its work to provide innovative solutions to the energy industry, which in turn can use EPRI resources to help food treatment, storage and processing organizations adopt the latest technological alternatives.
Ozone holes - regional thinnings in the ozone
layer - have developed over the Antarctic continent each September since the late 1970s.
The company's proprietary technology has created for the first time in the ozone
generating industry a system that is both economically feasible and technology sound.
Schoeberl, an atmospheric scientist with NASA, also notes that chlorine monoxide (ClO)--a principal chemical active in the ozone
destruction--was not always present at altitudes that would account for the low ozone levels.
That weakening in the ozone
layer would let some 6 to 12 percent more ultraviolet light reach Earth's surface, raising the risk of skin cancer, cataracts and damage to animals and plants.
One of the first projects under NARSTO will study ozone pollution control in the Ozone
Transport Region, a 12-state area from Maine to Virginia, including the District of Columbia.
Most chlorine in the ozone
layer comes from chlorofluorocarbons and other forms of pollution.
The hole is a reduction in the ozone
layer that normally shields Earth's surface from much of the sun's ultraviolet rays.