Early simulations of global air circulation

In 1964, NCAR scientists Warren Washington and Akira Kasahara began developing a general circulation model (GCM), a mathematical representation of major circulation patterns in Earth's atmosphere. This early computer modeling helped lay the foundation for more sophisticated models of global weather patterns and climate change. Their first GCM, published in 1967, was a two-layer global model with a 5 horizontal resolution that showed data at grid points about 300 miles apart at midlatitudes. They continued to refine the model until the late 1970s, when NCAR's Community Climate Model (CCM) gradually took its place..