Development of an MRI Chemical Transport Model for the Study of Stratospheric Chemistry

摘要: A three-dimensional chemical transport model(CTM) was developed at the Meteorological Research Institute by coupling a module with MJ98 general circulation model (dynamical module) for study of stratospheric chemistry.This model, MJ98-CTM, ran approximately 15 years and simulated species were investigated, focusing on time-mean fields. The based family method contains major species, i.e., 34 long-lived including 7 families short-lived 79 gas phase reactions photodissociations. Two types (I II) polar clouds (PSCs) sulfate aerosols included six heterogeneous PSCs three aerosols. MJ98-CTMs T21L45 T42L45 versions integrated using climatological monthly mean values sea-surface temperature ozone dynamical module, fixed surface surface-origin in module. Radiatively active gases such as ozone, methane, nitrous oxide not treated interactively between two modules. Horizontal resolutions 5.6°(∼600 km) T21 2.8°(∼300 T42 model. vertical resolution L45 had spacing about 2 km stratosphere top 0.01 hPa (80km).   Qualitatively, MJ98-CTM suitably reproduced temporal spatial features observed other middle atmosphere. However, lower held crucial errors distributions particularly yielding positive column ozone. cause these can be ascribed to associated transport: one wind field bias produced MJ98, from coarse resolution.