Quantifying the dependence of westerly wind bursts on the large-scale tropical Pacific SST


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dc.contributor.author Tziperman, Eli
dc.contributor.author Yu, Lisan
dc.date.accessioned 2010-11-23T19:48:21Z
dc.date.available 2010-11-23T19:48:21Z
dc.date.issued 2007-06-15
dc.identifier.citation Journal of Climate 20 (2007): 2760-2768 en_US
dc.identifier.uri http://hdl.handle.net/1912/4117
dc.description Author Posting. © American Meteorological Society, 2007. This article is posted here by permission of American Meteorological Society for personal use, not for redistribution. The definitive version was published in Journal of Climate 20 (2007): 2760-2768, doi:10.1175/JCLI4138a.1 en_US
dc.description.abstract The correlation between parameters characterizing observed westerly wind bursts (WWBs) in the equatorial Pacific and the large-scale SST is analyzed using singular value decomposition. The WWB parameters include the amplitude, location, scale, and probability of occurrence for a given SST distribution rather than the wind stress itself. This approach therefore allows for a nonlinear relationship between the SST and the wind signal of the WWBs. It is found that about half of the variance of the WWB parameters is explained by only two large-scale SST modes. The first mode represents a developed El Niño event, while the second mode represents the seasonal cycle. More specifically, the central longitude of WWBs, their longitudinal extent, and their probability seem to be determined to a significant degree by the ENSO-driven signal. The amplitude of the WWBs is found to be strongly influenced by the phase of the seasonal cycle. It is concluded that the WWBs, while partially stochastic, seem an inherent part of the large-scale deterministic ENSO dynamics. Implications for ENSO predictability and prediction are discussed. en_US
dc.description.sponsorship Eli Tziperman is supported by the U.S. National Science Foundation Climate Dynamics Program Grant ATM- 0351123 and by the McDonnell Foundation. Lisan Yu is supported by the NASA Ocean Vector Wind Science Team under JPL Contract 1216955 and NSF Climate Dynamics Grant ATM-0350266. en_US
dc.format.mimetype application/pdf
dc.language.iso en_US en_US
dc.publisher American Meteorological Society en_US
dc.relation.uri http://dx.doi.org/10.1175/JCLI4138a.1
dc.subject Sea surface temperature en_US
dc.subject Wind bursts en_US
dc.subject Tropics en_US
dc.subject Pacific Ocean en_US
dc.title Quantifying the dependence of westerly wind bursts on the large-scale tropical Pacific SST en_US
dc.type Article en_US
dc.identifier.doi 10.1175/JCLI4138a.1

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