Quantifying the dependence of westerly wind bursts on the large-scale tropical Pacific SST
MetadataShow full item record
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.
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
Showing items related by title, author, creator and subject.
Challenges and prospects for reducing coupled climate model SST biases in the eastern tropical Atlantic and Pacific Oceans : the U.S. CLIVAR Eastern Tropical Oceans Synthesis Working Group Zuidema, Paquita; Chang, Ping; Medeiros, Brian; Kirtman, Benjamin; Mechoso, Roberto; Schneider, Edwin K.; Toniazzo, Thomas; Richter, Ingo; Small, R. Justin; Bellomo, Katinka; Brandt, Peter; de Szoeke, Simon; Farrar, J. Thomas; Jung, Eunsil; Kato, Seiji; Li, Mingkui; Patricola, Christina; Wang, Zaiyu; Wood, Robert; Xu, Zhao (American Meteorological Society, 2017-01-12)Well-known problems trouble coupled general circulation models of the eastern Atlantic and Pacific Ocean basins. Model climates are significantly more symmetric about the equator than is observed. Model sea surface ...
Last deglaciation in the Okinawa Trough : subtropical northwest Pacific link to Northern Hemisphere and tropical climate Sun, Youbin; Oppo, Delia W.; Xiang, Rong; Liu, Weiguo; Gao, Shu (American Geophysical Union, 2005-06-23)Detailed deglacial and Holocene records of planktonic δ18O and Mg/Ca–based sea surface temperature (SST) from the Okinawa Trough suggest that at ∼18 to 17 thousand years before present (kyr B.P.), late spring/early summer ...