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GEOPHYSICAL RESEARCH LETTERS,
VOL. 33,
L18703,
doi:10.1029/2006GL026380,
2006
Global influence of the Northern Hemisphere second mode of the zonal average of the zonal wind
Jie Song
Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics,
Chinese Academy of Science, Beijing, China
Wen Zhou
Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics,
Chinese Academy of Science, Beijing, China
Jing Pan
Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics,
Chinese Academy of Science, Beijing, China
Chongyin Li
Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics,
Chinese Academy of Science, Beijing, China
Abstract
The authors examine the impact of two zonal wind modes in the northern hemisphere (Northern Annular Mode, NAM, and the second
zonal wind mode) on the global domain during the normal (non-El Niño/Southern Oscillation, ENSO) northern winter from 1981–2002.
It is found that both modes are in association with tropical zonal wind anomalies, but only the second zonal wind mode has
significant linkage with the Southern Annular Mode (SAM), particularly leading about 6–19 days. This kind of linkage can also
be found in extended datasets but only evident since 1974.
Received 24
March
2006;
accepted 4
August
2006;
published 23
September
2006.
Index Terms: 1610 Global Change: Atmosphere (0315, 0325); 1616 Global Change: Climate variability (1635, 3305, 3309, 4215, 4513); 3319 Atmospheric Processes: General circulation (1223).
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Citation: Song, J., W. Zhou, J. Pan, and C. Li
(2006),
Global influence of the Northern Hemisphere second mode of the zonal average of the zonal wind,
Geophys. Res. Lett.,
33,
L18703,
doi:10.1029/2006GL026380.
Copyright 2006 by the American Geophysical Union.
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