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Stratosphere-troposphere coupling mechanism. (South Carolina Academy of Sciences Abstracts).

The "Arctic Oscillation" (AO) is the dominant mode of Northern hemisphere wintertime climate variability. Characterized by the irregular shifting of atmospheric mass across the Arctic Circle, the Arctic Oscillation corresponds to the North-South migration of the Jet Stream and alteration of storm patterns. Recent studies have sown strong dynamical coupling between the AO and variations of the stratospheric polar vortex. Downward moving wind and temperature anomalies associated with rapid vortex breakdown appear to influence the Jet Streams and project strongly onto the AO. In this study, a careful examination of the AO is performed during anomalously strong vortex condition. Based on 44-year NCEP/NCAR global reanalyses data, a life cycle of a typical vortex intensification episode is established, and then a lead-lag composite technique is utilized (with respect to the life cycle) to find a relationship with the AO. Our provide further suggestion of how the stratosphere can influence the troposphere climate.
Kumar Jeeve, Varavut Limpasuvan
Department of Chemistry and Physics
Coastal Carolina University
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Title Annotation:Arctic Oscillation and weather systems research
Author:Jeeve, Kumar; Limpasuvan, Varavut
Publication:Bulletin of the South Carolina Academy of Science
Article Type:Brief Article
Geographic Code:0ARCT
Date:Jan 1, 2003
Words:164
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