大气环流概述一历史简介 1856年，Ferrel's view Observed southwesterly challenged Hadley's theory; Three-cell circulation, close to current views of earth's general circulation. 授课教师：张洋 94. Ferrel’s circulation model (1856) Hadley’s circulation model contradicts with observations, which show poleward drift over the midlatitude surface. Ferrel ( ) gg 1856) suggested a circulation which is almost the same as the present view. He argued that near the surface friction would reduce the speed of the westerlies, so that Coriolis force fails to balance the poleward pressure gradient. 10 ⼤⽓环流概述－历史简介 ! 1856年, Ferrel’s view 授课教师：张洋 9 ! Observed southwesterly challenged Hadley’s theory; ! Three-cell circulation, close to current views of earth’s general circulation