The long-range transport of air pollutants—some thoughts on the state of modelling

Fate of ammonia in the atmosphere?a review for applicability to hazardous releases

“…Various approaches are used to describe physical dispersion of the pollutants: Lagrangian [184], simple mixing and long term averaging [185], Gaussian plume formulation for point sources and statistical long term transport [186], Eulerian for horizontal transport and Gaussian for vertical distribution [187,188]. In general, long-term trends are described satisfactorily but the main weakness remains in the lack of good data for local ammonia emission.…”

Wet deposition of ammonium in Europe

“…To be able to compare modelled wet deposition fields for ammonium and observed deposition fields, there is an urgent need for reliable ammonium concentration data in precipitation (see, e.g., Dement, 1987;Fisher, 1987). Problems in interpreting earlier model results (Fisher, 1984) could, at least, be partly attributed to the lack of reliable measurements. This paper will mainly address to the information available to correct ammonium wet deposition data and by doing so, to obtain a better estimate of ammonium depositions occurring in reality.…”

Modeling the Long-Range Transport of Plant Pathogens in the Atmosphere

“…Aylor (3,5) attempted to put transport analysis on a firmer foundation by estimating the number of spores that actually arrive The literature on atmospheric-transport and diffusion modeling is exten sive. Six recent volumes (22-25, 64, 80) provide excellent reviews of all aspects of the modeling problem, while Fisher (32,33) writes, in a more philosophical manner, on the present state of the modeling effort.…”