Method for Investigating Factors that Influence HC-NO_x Type Photochemical Air Pollution Accompanied with Advection

概要

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To study HC-NO_x type photochemical air pollution, a simple advection model in which polluted air was enclosed in boxes at uniform concentrations and transported in one direction was proposed. Changes in pollutant concentration at any arbitrarily selected points along the advection trajectory path were obtained from the calculation using this model. The calculated results were compared with the environmental survey results to clarify the significance of the model. The concentration changes in pollutants during a day were found to well conform to the representative pollutant concentration changes in the actual environment, verifying the usefulness of the suggested method in studying pollution-influencing factors. Based on the calculation experiments, seven factors considered useful in explaining the pollution episodes in the environment were pointed out. The influence of these factors, especially, the influence on the ozone concentration change along the advection path was clarified through comparison with the environmental pollution conditions.
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