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Title: The rôle of orographically and thermally forced stationary waves in the causation of the residual circulation
Authors: Becker, E.Schmitz, G.
Publishers Version:
Issue Date: 1999
Published in: Tellus A: Dynamic Meteorology and Oceanography, Volume 51, Issue 5, Page 902-913
Publisher: Milton Park : Taylor & Francis
Abstract: Several experiments performed with an idealized troposphere–stratosphere GCM are comparedto estimate the impact of orography and prescribed local heat sources on the residual circulationin the northern winter stratosphere. It is found that only the combined action of orographicand thermal wave forcing in northern midlatitudes is capable of inducing a residual circulationreaching continuously from tropical to polar latitudes at stratospheric altitudes. Intensificationsof the residual circulation in response to modified forcing of stationary waves are generallyassociated with, firstly, a reduced polar night jet accompanied by enhanced easterlies inlow and summer hemispheric latitudes and, secondly, substantial warming of the polar nightstratosphere completely compensated by cooling in the tropics and subtropics.
Keywords: atmospheric circulation; atmospheric dynamics; atmospheric general circulation model; atmospheric wave; orographic effect; temperature effect
DDC: 550
License: CC BY 4.0 Unported
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