Tropospheric Chemistry

The Tropospheric Chemistry program conducts observations to understand the emissions and atmospheric processes that influence air quality and climate. Scientists in this program build, characterize and deploy state-of-the-art instruments to measure atmospheric gas and aerosol species from ultra-trace levels in the remote atmosphere to extremely high concentrations found at emission sources. Measurements utilize various platforms such as aircraft, ships, towers, mobile laboratories, drones and ground sites to sample at all scales, from local to global. The program collaborates and partners with local, state and federal agencies, industries, academic institutions and the international community to provide timely, reliable, mission-driven scientific results.

link to Article — **Research Highlight**: Analysis of measurements taken during NOAA research flights indicates that emissions from a single source may be responsible for a significant fraction of the fine particles that form the dense winter brown clouds that hang over Salt Lake City. *Learn More* Photo: J. Clark, NOAA