Antitrades: Difference between revisions

Latest revision as of 22:28, 13 January 2024

A deep layer of westerly winds in the troposphere above the surface trade winds of the Tropics.

They comprise the equatorward side of the midlatitude westerlies, but are found at upper levels rather than at the surface. The antitrades are best developed in the winter hemisphere and also above the eastern extremities of the subtropical highs. Farther west their base is higher and their appearance less regular. The antitrades were formerly regarded as return currents carrying away, to higher latitudes, the air that rises in the intertropical convergence zones, the westerly component being due to the conservation of angular momentum as the air moves into higher latitudes. Bjerknes (1935) showed that this explanation is incomplete: The antitrades are dynamical in origin and constitute an essential part of the atmosphere's primary circulation.
Bjerknes, J. 1935. La circulation atmosphérique dans les latitudes sous-tropicales. Scientia. 57. 114–123.

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+{{Term
+|Display title=antitrades
-{{TermHeader}}
+|Definitions={{Definition
-{{TermSearch}}
+|Num=1
+|Meaning=A deep layer of westerly winds in the [[troposphere]] above the surface trade winds of the  [[Tropics]].
-<div class="termentry">
+|Explanation=They comprise the equatorward side of the midlatitude [[westerlies]], but are found at upper  levels rather than at the surface. The antitrades are best developed in the winter hemisphere and  also above the eastern extremities of the subtropical highs. Farther west their base is higher and  their appearance less regular. The antitrades were formerly regarded as return currents carrying  away, to higher latitudes, the air that rises in the [[intertropical convergence zones]], the westerly  component being due to the [[conservation of angular momentum]] as the air moves into higher  latitudes. Bjerknes (1935) showed that this explanation is incomplete: The antitrades are dynamical  in origin and constitute an essential part of the [[atmosphere]]'s [[primary circulation]].<br/> Bjerknes, J. 1935. La circulation atmosph&#x000e9;rique dans les latitudes sous-tropicales. Scientia. 57. 114&ndash;123.
-  <div class="term">
+}}
-== antitrades ==
+}}
-  </div>
-<div class="definition"><div class="short_definition">A deep layer of westerly winds in the [[troposphere]] above the surface trade winds of the  [[Tropics]].</div><br/> <div class="paragraph">They comprise the equatorward side of the midlatitude [[westerlies]], but are found at upper  levels rather than at the surface. The antitrades are best developed in the winter hemisphere and  also above the eastern extremities of the subtropical highs. Farther west their base is higher and  their appearance less regular. The antitrades were formerly regarded as return currents carrying  away, to higher latitudes, the air that rises in the [[intertropical convergence zones]], the westerly  component being due to the [[conservation of angular momentum]] as the air moves into higher  latitudes. Bjerknes (1935) showed that this explanation is incomplete: The antitrades are dynamical  in origin and constitute an essential part of the [[atmosphere]]'s [[primary circulation]].</div><br/> </div><div class="reference">Bjerknes, J. 1935. La circulation atmosph&eacute;rique dans les latitudes sous-tropicales. Scientia. 57. 114&ndash;123. </div><br/>
-</div>
-{{TermIndex}}
-{{TermFooter}}
-[[Category:Terms_A]]