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Energetics of the Tropical Atlantic Zonal Mode

Author(s): Burls, Natalie J; Reason, Chris JC; Penven, Pierreck; Philander, Samuel G

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dc.contributor.authorBurls, Natalie J-
dc.contributor.authorReason, Chris JC-
dc.contributor.authorPenven, Pierreck-
dc.contributor.authorPhilander, Samuel G-
dc.date.accessioned2022-01-25T14:58:42Z-
dc.date.available2022-01-25T14:58:42Z-
dc.date.issued2012-11-12en_US
dc.identifier.citationBurls, Natalie J., Chris J.C. Reason, Pierrick Penven, and Samuel G. Philander. "Energetics of the tropical Atlantic zonal mode." Journal of Climate 25, no. 21 (2012): 7442-7466. DOI: 10.1175/JCLI-D-11-00602.1.en_US
dc.identifier.issn0894-8755-
dc.identifier.urihttp://arks.princeton.edu/ark:/88435/pr1qb9v51m-
dc.description.abstractSea surface temperature in the central-eastern equatorial Atlantic has a seasonal cycle far bigger than that of the Pacific, but interannual anomalies smaller than those of the Pacific. Given the amplitude of seasonal SST variability, one wonders whether the seasonal cycle in the Atlantic is so dominant that it is able to strongly influence the evolution of its interannual variability. In this study, interannual upper-ocean variability within the tropical Atlantic is viewed from an energetics perspective, and the role of ocean dynamics, in particular the role of ocean memory, within zonal mode events is investigated. Unlike in the Pacific where seasonal and interannual variability involve distinctly different processes, the results suggest that the latter is a modulation of the former in the Atlantic, whose seasonal cycle has similarities with El Niño and La Niña in the Pacific. The ocean memory mechanism associated with the zonal mode appears to operate on much shorter time scales than that associated with the El Niño–Southern Oscillation, largely being associated with interannual modulations of a seasonally active delayed negative feedback response. Differences between the El Niño–Southern Oscillation and the zonal mode can then be accounted for in terms of these distinctions. Anomalous wind power over the tropical Atlantic is shown to be a potential predictor for zonal mode events. However, because zonal mode events are due to a modulation of seasonally active coupled processes, and not independent processes operating on interannual time scales as seen in the Pacific, the lead time of this potential predictability is limited.en_US
dc.format.extent7442 - 7466en_US
dc.language.isoen_USen_US
dc.relation.ispartofJournal of Climateen_US
dc.rightsFinal published version. Article is made available in OAR by the publisher's permission or policy.en_US
dc.titleEnergetics of the Tropical Atlantic Zonal Modeen_US
dc.typeJournal Articleen_US
dc.identifier.doiDOI: 10.1175/JCLI-D-11-00602.1-
dc.identifier.eissn1520-0442-
pu.type.symplectichttp://www.symplectic.co.uk/publications/atom-terms/1.0/journal-articleen_US

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