The global aerosol model
Atmospheric aerosol particles, which are very small and suspended in the air, affect the Earth's
climate by directly scattering and absorbing the atmospheric radiation and indirectly by
acting as cloud condensation nuclei and modifying the optical properties of clouds. The origins
of the aerosol particles are very complicated, and include not only natural sources but also
anthropogenic causes. The aerosol particles include various chemical species, such as
sulfate, black carbon, organic carbon, mineral dust and sea salt. Because the aerosols from
anthropogenic sources have been increasing since the Industrial Revolution, and the aerosols from
natural sources are influenced by the climate change, it is important for the global warming
projection to take into account the climatic effects of aerosols.
The global aerosol model simulates the distribution of aerosols. It includes emissions,
atmospheric transport, chemical reactions, gravitational settling, removal processes by dry
deposition and precipitations, based on the meteorological fields and surface conditions
simulated by the atmospheric general circulation model (MRI-CGCM3) and chemical species by the chemistry
climate model (MRI CCM). The simulated aerosol distributions are used to calculate the effect of
aerosols on atmospheric radiation and clouds in the atmospheric general circulation model.
JMA > MRI > Comprehensive Projection of Climate Change around Japan due to the Global Warming > Development of Earth System Model for Global Warming Projection > Aerosol Model
by Team GW of MRI
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