Atmospheric Chemistry (Ozone) Model

Global chemistry-climate (ozone) model development

@Most of the Earth's atmospheric ozone (about 90%) is found in the stratosphere which is situated between about 10 km and 50 km altitude above the surface. In the troposphere, which is the lowest layer of the atmosphere whose depth is about 10 km, a small fraction (about 10%) of the column ozone resides. Whereas the so-called stratospheric ozone layer absorbs ultraviolet radiation emitted by the Sun with protecting life on Earth, the ozone at high concentrations near the surface can lead to harmful effects in humans and vegetation. The atmospheric ozone also contributes to greenhouse forcing and exerts significant influences on the Earth's climate. Threfore, the ozone variability and its effects on the Earth's climate need to be incorpolated into a climate model to predict global warming with accuracy.
@The MRI global chemistry-climate model (MRI CCM2) deals with the variability of the atmospheric ozone and its related trace gases. The target region of MRI CCM2 is from the surface to the upper stratosphere. MRI CCM2 includes full representations of dynamical and physical processes such as transport, vertical diffusion and deposition, and chemical processes between many trace gases. MRI CCM2 can be coupled with the MRI atmosphere-ocean coupled model (MRI CGCM3) and the MRI aerosol chemistry-climate model (MASINGAR) on-line. The concentrations of ozone simulated by MRI CCM2 can be used in the calculations of net-heating rates in MRI CGCM3, so that radiative-dynamical interaction with ozone can be simulated.


JMA > MRI > Comprehensive Projection of Climate Change around Japan due to the Global Warming > Development of Earth System Model for Global Warming Projection > Atmospheric Chemistry (Ozone) Model

Mar.2008
by Team GW of MRI
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