ABSTRACT
Earth’s atmosphere is in perpetual motion: movement which is striving to eradicate the differences in temperature and pressure between different parts of the globe. It is this motion which produces the winds and storms with which we are all familiar. It is this circulation which plays a basic part in maintaining a steady state in the atmosphere and generating the climatic zones which characterize Earth. So far we have considered the upward movements which transfer energy from the surface to the atmosphere. Let us now consider the more obvious horizontal movements that transfer air around the globe.
