2018 年 32 巻 3 号 p. 329-336
A chemical transport model (CTM) is a type of numerical model that represents atmospheric behavior of various trace substances. This article describes a regional CTM and its application to numerical simulations of particulate matter with a diameter of 2.5 μm or less (PM2.5). A regional CTM is driven by meteorological fields produced by a meteorological model with emission data derived from various emission inventories and boundary concentrations calculated by a global CTM. Two sets of PM2.5 simulations are presented: one is an application of a regional CTM with a tracer method to an estimate of the contribution of long-range transport (LRT) from the Asian Continent to PM2.5 concentration in Japan, and the other is an application of an online-type regional CTM with meteorology-chemistry feedbacks to an evaluation of the impacts of the aerosol direct effect on simulated PM2.5 fields in East Asia.
