Meteorological and Back Trajectory Modeling for the Rocky Mountain Atmospheric Nitrogen and Sulfur Study II
Figure 9
Three analyses of WRF back trajectories for 24-hour measured ammonia at the core site for the study year shown on maps of the Western United States with state boundaries. (a) Overall residence time or likelihood of an air mass arriving from each grid cell. (b) Mean ammonia concentration at the receptor when air mass arrived from each grid cell. (c) Concentration-weighted residence time. The distance from the Pacific Coast to the eastern edge of each map is approximately 2500 km.
