The Network for the Detection of Atmospheric Composition Change (NDACC):...

De Mazière, M., A. M. Thompson, M. J. Kurylo, J. D. Wild, G. Bernhard, T. Blumenstock, G. Braathen, J. W. Hannigan, J. Lambert, T. Leblanc, T. J. McGee, G. Nedoluha, I. Petropavlovskikh, G. Seckmeyer, P. Simon, W. Steinbrecht, and S. Strahan (2018), The Network for the Detection of Atmospheric Composition Change (NDACC): history, status and perspectives, Atmos. Chem. Phys., 18, 4935-4964, doi:10.5194/acp-18-4935-2018.

The Network for the Detection of Atmospheric Composition Change (NDACC) is an international global network of more than 90 stations making high-quality measurements of atmospheric composition that began official operations in 1991 after 5 years of planning. Apart from sonde measurements, all measurements in the network are performed by ground-based remote-sensing techniques. Originally named the Network for the Detection of Stratospheric Change (NDSC), the name of the network was changed to NDACC in 2005 to better reflect the expanded scope of its measurements. The primary goal of NDACC is to establish long-term databases for detecting changes and trends in the chemical and physical state of the atmosphere (mesosphere, stratosphere, and troposphere) and to assess the coupling of such changes with climate and air quality. NDACC’s origins, station locations, organizational structure, and data archiving are described. NDACC is structured around categories of ground-based observational techniques (sonde, lidar, microwave radiometers, Fourier-transform infrared, UVvisible DOAS (differential optical absorption spectroscopy)type, and Dobson–Brewer spectrometers, as well as spectral UV radiometers), timely cross-cutting themes (ozone, water vapour, measurement strategies, cross-network data integration), satellite measurement systems, and theory and analyses. Participation in NDACC requires compliance with strict measurement and data protocols to ensure that the net-

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Upper Atmosphere Research Program (UARP)