The international Network for the Detection of
Atmospheric Composition Change (NDACC) is composed of
more than 70 high-quality, remote-sensing research stations
for observing and understanding the physical and chemical
state of the stratosphere and upper troposphere and for
assessing the impact of stratosphere changes on the
underlying troposphere and on global climate.
While the NDACC remains committed to monitoring changes in
the stratosphere with an emphasis on the long-term evolution
of the ozone layer, its priorities have broadened
considerably to encompass issues such as the detection of
trends in overall atmospheric composition and understanding
their impacts on the stratosphere and troposphere, and
establishing links between climate change and atmospheric
composition.
Following five years of planning, instrument design
and implementation, the NDACC began network operations in
January 1991.
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