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Atmospheric Dispersion in D-4 Atmospheric Dispersion research deals with meteorological, air chemistry, plume dispersion, computational fluid dynamics (CFD), and emissions models. We have been involved in a number of applied urban air quality projects (e.g., Mexico City, El Paso/Ciudad Juarez) and plume dispersion modeling efforts (e.g., Chilean smelters, Dallas toxic release). In the Chem-Bio Transport and Fate Program, we are part of a multi-group team linking together CFD and atmospheric transport models to cover plume dispersion from building to urban to meso scales. As part of this effort, a "virtual planner" is being developed to visualize plume dispersion in a GIS-like graphical user interface. As part of the Urban Security Project, we are working on linking together air and water transport models in order to follow pollutants through the complete urban system. Other current research efforts include developing urban canopy parameterizations for use in mesoscale models, constructing a puff meander model for computing concentration fluctuations, producing a real-time tailpipe emissions model to compute effluents from individual cars on a second-by-second basis, deriving simple urban parameterizations for dispersion models, and modifying turbulence parameterizations for use in CFD models applied to flow around buildings.
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See a few slides on LANL
air quality capabilities and projects.
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