The rôle of orographically and thermally forced stationary waves in the causation of the residual circulation
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 forci...
| Main Authors: | , |
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| Format: | Article in Journal/Newspaper |
| Language: | English |
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Milton Park : Taylor & Francis
1999
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| Online Access: | https://doi.org/10.34657/1358 https://oa.tib.eu/renate/handle/123456789/922 |
| Summary: | 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. publishedVersion |
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