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Preprints
https://doi.org/10.5194/esdd-3-979-2012
https://doi.org/10.5194/esdd-3-979-2012
03 Sep 2012
 | 03 Sep 2012
Status: this preprint was under review for the journal ESD. A revision for further review has not been submitted.

Toward a classification of the Central Pacific El Niño

M. Pascolini-Campbell, D. Zanchettin, O. Bothe, C. Timmreck, D. Matei, J. H. Jungclaus, and H.-F. Graf

Abstract. We investigate the various methods currently available for distinguishing between the Central Pacific (CP) El Niño (or "El Niño Modoki") and the canonical El Niño by considering 10 different methods and 5 sea surface temperature (SST) datasets from 1880 to 2010. Years which are classified as CP El Niños with the greatest convergence between method and SST dataset are considered to provide a more robust identification of these events. The results identify 13 yr which are classified the most consistently as CP events: 1885/1886, 1914/1915, 1940/1941, 1958/1959, 1963/1964, 1968/1969, 1977/1978, 1986/1987, 1991/1992, 2002/2003, 2003/2004, 2004/2005 and 2009/2010. Our findings also indicate the persistence of CP events throughout the time period investigated, inciting the role of multidecadal natural climate variability in generating CP El Niños.

Publisher's note: Copernicus Publications remains neutral with regard to jurisdictional claims made in the text, published maps, institutional affiliations, or any other geographical representation in this preprint. The responsibility to include appropriate place names lies with the authors.
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