Hadley cell

(redirected from Hadley circulation)

Hadley cell

[′had·lē ‚sel]
(meteorology)
A direct, thermally driven, and zonally symmetric circulation first proposed by George Hadley as an explanation for the trade winds; it consists of the equatorward movement of the trade winds between about latitude 30° and the equator in each hemisphere, with rising wind components near the equator, poleward flow aloft, and finally descending components at about latitude 30° again.
References in periodicals archive ?
This so-called Hadley circulation ensures that most dust lofted into the atmosphere in the tropics doesn't travel to other parts of the world.
This provided a weaker driving force for the Hadley circulation, and Chylek's calculations show that the warm, high-altitude tropical air may have reached latitudes of only 27 [degrees] before it fell back to Earth.