Interfacial Transfer Resistances of Ozone Dry Deposition Over Agricultural Soil of Tainan County,Taiwan

Abstract

A dry deposition chamber was constructed to measure ozone depletion over field soil and compared with the mathematical model that was derived in this study. Results verify that interfacial transfer resistance (R_S) of ozone dry deposition involves both the reactive resistance (R_Sr) and the kinetic resistance (R_Sk). The reactive resistance is produced by the chemical reaction O₃ + NO → NO₂ + O₂. Interfacial transfer resistance depends on the emission of nitrogen oxide (NO) and soil temperature (T_S). The kinetic resistance depends on soil temperature. Model ozone profiles were smaller than the observed data (deposition curve), and within relative errors of 12%. NO emission flux (F_NO) was increased exponentially with increasing soil temperature. Observed R_Sk decreased linearly with increasing soil temperature. Both observed R_S and R_Sr decreased exponentially with increasing soil temperature, and R_S was affected by R_Sr. Observed R_Sr approaches first-order kinetics, and regenerates nitrogen dioxide (NO₂) which influences the air quality.