3. Tri-cellular circulation By Eugene Brown | 7 November 2012 0 Comment PageDiscussionHistoryGrade 11 CAPS > Climate and Weather > 2. Global Air Circulation > Geography CAPS > 3. Tri-cellular circulation 3. Tri-cellular circulation: Hadley, Ferrel and polar cells and Winds related to global air circulation: westerlies, tropical easterlies and polar easterlies 3. Tri-cellular circulation: Hadley, Ferrel and polar cells and Winds related to global air circulation: westerlies, tropical easterlies and polar easterlies Tags: Tri-cellular circulation E-mail: