General Circulation Models (GCMs)of the Atmosphere

General circulation models (GCMs) of the atmosphere

A) are pre-computer based models that estimated atmospheric and oceanic circulation and are now being used to study climate change.
B) are highly simplistic models that use one or two variables to test the veracity of climate proxies,such as ice core and ocean sediment core samples.
C) are based on statistical three-dimensional grids that characterize portions of the atmosphere and ocean in terms of climate-related variables.
D) calculate the concentrations of greenhouse gases in the atmosphere based on data from weather stations located around the globe.
E) are a combined GIS and remote sensing technique to monitor atmospheric and ocean currents.