Pub. date: 2008 | Online Pub. Date: April 25, 2008 | DOI: 10.4135/9781412963893 | Print ISBN: 9781412958783 | Online ISBN: 9781412963893 | Publisher:SAGE Publications, Inc.About this encyclopedia
THE JET STREAMS are fast-flowing eastward currents of air in the mid-latitudes of both hemispheres, with their cores at altitudes above 30,000 ft. (9,144 m.). Although they flow eastward, they are driven by the temperature contrast between the equator and the poles. Near the equator where surface temperatures are at a maximum, the air rises and, The ...