General Circulation Models (GCMs)of the Atmosphere

General circulation models (GCMs) of the atmosphere

A) produce very specific results as to time and place.
B) are now in operation at over a dozen places in Canada.
C) are based on statistical three-dimensional boxes that characterize portions of the atmosphere and ocean in terms of climate-related variables.
D) are essentially unrelated to mathematical models originally established for forecasting weather.
E) are based on short term weather data for many places on Earth.