The GAIA model is a simulation model capable of handling the entire region of the Earth’s atmosphere from the troposphere through the ionosphere, and formed by coupling the following sub-models
Atmospheric general circulation model handling the entire neutral atmospheric region of the Earth. Includes the range from meteorological processes in the troposphere to photochemical reactions in the thermosphere or interactions with the ionosphere.
Global; altitude of 0 to 600 km
Horizontally T106 (1.125 deg) to T21 (5.6 deg); vertically 0.2H to 0.4H (H: Scale height)
The sub-models are combined through the "coupler module."
The coupler module exchanges physical variables among the sub-models, converts coordinates, controls common parameters and processes, and handles inputs/outputs. (Reference:Jin et al. )