The international Network for the Detection of Atmospheric Composition Change (NDACC) is composed of more than 70 globally distributed, ground-based, remote-sensing research stations with more than 160 currently active instruments providing high quality, consistent, standardized, long-term measurements of atmospheric temperatures and trace gases, particles, spectral UV radiation reaching the Earth's surface, and physical parameters for detection of trends in overall atmospheric composition, understanding their impacts on the stratosphere, troposphere, and mesosphere, establishing links between climate change and atmospheric composition, testing and validating atmospheric measurements from satellites, supporting process-focused scientific field campaigns, and testing and improving theoretical models of the atmosphere.
The NDACC began network operations as The Network for Detection of Stratospheric Change (NDSC) in January 1991.
The NDACC has been endorsed by national and international scientific agencies, including the United Nations Environment Program (UNEP) and the International Ozone Commission of the International Association of Meteorology and Atmospheric Sciences. NDACC is a major contributor to the Global Atmosphere Watch (GAW) Program of the World Meteorological Organization (WMO) and a key component of the Integrated Global Atmospheric Chemistry Observation (IGACO) initiative.
Produced approximately every two to three years by the Steering Committee, the newsletter contains articles on Network News, Working Group Activities, Site Status and Development, New Measurements, Steering Committee Activities, etc.