Interfacial transfer velocities of ozone dry deposition over agricultural soils: Experimental and theoretical analysis

A mathematical dry deposition model was developed and an experiment performed to verify that the interfacial transfer velocity (Vs) of ozone dry deposition includes the interfacial reactive velocity (VS,) and interfacial kinetic velocity (V-Sk), as determined by measuring the ozone depletion over agricultural field soils in a dry deposition chamber. Experimental results indicate that the chemical reaction (O-3 + NO --> NO2 + O-2) produces the reactive velocity. Observed interfacial transfer velocities depend on nitrogen oxide emission (NO) and soil temperature (T-S). Additionally, observed kinetic velocities of conditioned field soils increased linearly with soil temperature. Moreover, observed reactive velocities of field soils increased exponentially with soil temperature, and depend on the emission rate of nitrogen oxide. Results in this study demonstrate that interfacial transfer velocities are variable velocities for long-term transportation, that influenced factors are chemical kinetics, thermodynamics and biochemical mechanisms.