The Group Modeling of the Atmosphere and its Interfaces (GMAI) carries out studies and develops products related to the atmosphere and its interaction with other components of the earth system. The adopted methodology includes advanced numerical models, solved with state-of-the-art high-performance computer systems, direct and remote sensing observational data analyses and treatment, and assimilation techniques of these data into the numerical models.

From the numerical modeling point of view, GMAI has been developing and improving a number of models related to numerical forecast and climate, air quality and chemical composition of the atmosphere, and soil water storage for its research. Various GMAI models are used operationally at CPTEC/INPE, and others were implemented in USA models (CAMx, GEOS-5 e WRF/CHEM). In particular, GMAI leads the development of the numerical system CCATT-BRAMS (Coupled Chemistry-Aerosol-Tracer Transport model to BRAMS) that has the ability to simulate emissions, transport, chemical activity and deposition of gases and aerosols in the atmosphere. CCATT-BRAMS is used on an operational basis for air quality monitoring over South America by CPTEC/INPE.

Recently, GMAI acquired a complete meteorological and air quality monitoring station and will also acquire observational data for validation and studies of and with numerical models. GMAI counts with two high-performance clusters for its numerical studies, the most recent of which includes 200 AMD/OPTERON processor cores linked by a high-speed network.

Since 1999 GMAI members published about 40 articles in peer-reviewed journals, most of which with Qualis A index. Apart from the scientific contribution, the development with operational focus maintained by the group pretends to offer support of public health, economical, and social actions and politics related to short and medium term impacts of atmospheric pollutant emissions and transport.