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| Titel |
Geomagnetic activity forcing of the Northern Annular Mode via the stratosphere |
| VerfasserIn |
D. R. Palamara, E. A. Bryant |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 22, no. 3 ; Nr. 22, no. 3 (2004-03-19), S.725-731 |
| Datensatznummer |
250014797
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| Publikation (Nr.) |
 copernicus.org/angeo-22-725-2004.pdf |
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| Zusammenfassung |
We consider various aspects of the link between solar-modulated geomagnetic activity
and the Northern Annular Mode (NAM). Our results indicate that the geomagnetic
forcing of atmospheric circulation in the Northern Hemisphere is temporally and
seasonally restricted, modulated by the Quasi-Biennial Oscillation (QBO), and reliant on
stratosphere-troposphere coupling. When the data are restricted to January values after
1965, for years in which the January QBO is eastwards, the correlation coefficient
between the geomagnetic AA index and the NAM is 0.85. These results can account for
many of the enigmatic features of Northern Hemisphere circulation.
Key words. Meterology and atmospheric dynamics (general
circulation, climatology) |
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