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Terms of Reference
The middle atmosphere (the stratosphere and mesosphere) is a region of complex dynamical–photochemical interactions. In order to help the middle-atmospheric scientists of differing specialties (such as atmospheric chemists, meteorologists, radio scientists, and aeronomers) find a common ground for interaction, it is imperative that middle-atmosphere research and observations be expanded so that we may better understand the effects of anthropogenic pollutants on the middle atmosphere. These efforts should include observations of the concentration and distribution of trace constituents (e.g., ozone), including monitoring to establish long-term trends; the advancement of our understanding of the transport of constituents into the middle atmosphere from above and below; the development of improved radiative transfer, photochemical, and dynamical models of the stratosphere and mesosphere; and the determination of the impact of changes in the middle atmosphere on long-range forecasting and climate.