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. The dispersion of particles from wildfires, volcanic eruptions, dust storms,and other aerosol sources can affect many environmental factors downwind,including air quality. Aerosol injection height is one source attribute thatmediates downwind dispersion, as wind speed and direction can varydramatically with elevation. Using plume heights derived from space-based,multi-angle imaging, we examine the impact of initializing plumes in the NOAAAir Resources Laboratory's Hybrid Single-Particle Lagrangian IntegratedTrajectory (HYSPLIT) model with satellite-measured vs. nominal(model-calculated or VAAC-reported) injection height on the simulateddispersion of six large aerosol plumes. When there are significantdifferences in nominal vs. satellite-derived particle injection heights,especially if both heights are in the free troposphere or if one injectionheight is within the planetary boundary layer (PBL) and the other is abovethe PBL, differences in simulation results can arise. In the cases studiedwith significant nominal vs. satellite-derived injection height differences,the HYSPLIT model can represent plume evolution better, relative toindependent satellite observations, if the injection height in the model isconstrained by hyper-stereo satellite retrievals.

The impact of MISR-derived injection height initialization on wildfire and volcanic plume dispersion in the HYSPLIT model