Investigation of Multi-scale Processes Affecting Atmospheric Chemical Transport



IMPAACT is a nascent combined modeling and observational program that will investigate the physical and chemical processes occurring as pollution is transported from near the surface of East Asia, across the Pacific Ocean, to the Arctic and western North America. IMPAACT differs from earlier studies in that it focuses on processes that occur within warm conveyer belts (WCBs), which are part of the cyclonic weather systems that produce vertical air movements in the midlatitudes. Planned for spring 2021, IMPAACT will characterize and track air masses from East Asia near the surface, as they are lifted in WCBs, as they traverse the Pacific above the surface, and as they are carried into the Arctic and the heavily populated Pacific coastline of North America.

Currently in planning, IMPAACT is envisioned as a multi-agency, international program involving research aircraft, ships, and surface sites. Support from the National Oceanic and Atmospheric Administration (NOAA), the National Aeronautics and Space Administration (NASA), and the U.S. National Science Foundation (NSF) is being sought. IMPAACT was originally conceived as part of the air Pollution in the Arctic: Climate, Environment and Societies (PACES), an activity sponsored by the International Global Atmospheric Chemistry Project (IGAC) and the International Arctic Science Committee (IASC), to improve understanding of the transport of midlatitude pollutants to the Arctic.

An informational Town Hall meeting is being held at the 2017 Fall Meeting of the American Geophysical Union. This meeting will be at the Courtyard by Marriott New Orleans Downtown/Convention Center on Monday, 11 December from 6:15 to 7:15 PM (18:15-19:15). 



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