Climate models are systems of [[differential equation]]s based on the basic laws of [[physics]], [[Fluid dynamics|fluid motion]], and [[chemistry]]. To “run” a model, scientists divide the planet into a Three-dimensional grid, apply the basic equations, and evaluate the results. Atmospheric models calculate [[winds]], [[heat transfer]], [[radiation]], [[relative humidity]], and [[Overland runoff|'''overland''' '''runoff''']] within each grid and evaluate interactions with neighboring points.
Climate models may be Numerical,and also qualitative (i.e. not numerical) .Qualitative Climate models are narratives, largely descriptive, of possible futures.