Reflection on communicating atmospheric composition and its impacts

The Global Atmosphere Watch (GAW) Programme of the World Meteorological Organization (WMO) is driven by the need to understand the variability and trends in the composition of the global atmosphere and the related physical parameters, and to assess the consequences thereof. GAW provides reliable scientific information for a broad spectrum of users, including policymakers, on topics related to atmospheric chemical composition. The programme supports international environmental and climate agreements and improves our understanding of climate change and long-range transboundary air pollution through its work on greenhouse gases, aerosols, reactive gases, atmospheric deposition, stratospheric ozone, and ultraviolet radiation. GAW provides information based on combinations of observations, data analysis and modelling activities, and supports a number of applications at the global, regional and urban scale. This implies a variety of target groups and communication vectors.

To sustain the credibility and increase the visibility of GAW within the WMO community and other national/international bodies, the broader scientific and policy communities, as well as the general public, communication efforts are required. Several activities during the EGU General Assembly 2019 have been carried out to celebrate the 30^th anniversary of GAW.

For instance, a Union Symposium explored the 30 year journey from fundamental Atmospheric Composition Research to Societal Services. It showcased the importance of atmospheric composition research to climate, weather forecasting, human health, agricultural productivity and food security. The session highlighted the progress made in translating research into services, but stressed that much more needs to be done. A mentimeter survey during this Union Symposium revealed that among the scientific community GAW is valued for its coordination, observations, capacity building, outreach and its global focus.

Reflections on communication of atmospheric composition and outcomes from the 30^th anniversary celebration of GAW will be presented.