(Article of periodic en Anglais - 2011)

Document title

El Niño meets La Niña – anomalous rainfall patterns in the “traditional” El Niño region of southern Ecuador

Authors(s) and Affiliation(s)

BENDIX J. (1) ; TRACHTE K. (1) ; PALACIOS E. (2) ; ROLLENBECK R. (1) ; GÖTTLICHER D. (1) ; NAUSS T. (3) ; BENDIX A. (1) ;
(1) Lab. for Climatology and Remote Sensing, Univ., Marburg, ALLEMAGNE
(2) Inst. Nacional de Meteorología e Hidrología, Quito, EQUATEUR
(3) Fac. of Geography, Univ., Marburg, ALLEMAGNE


In this paper, the central Pacific cold event of 2008 and its exceptionally warm conditions in the eastern tropical Pacific are analyzed by using rainfall data of south Ecuadorian meteorological stations, sea surface temperatures in the El Niño3 and 1+2 regions, and simulations with the Weather Research and Forecasting (WRF) model. Since 2000, El Niño events unexpectedly provide below average rainfall while central Pacific La Niña conditions generate exceptional severe flooding in the normally drier coastal plains. The novel sea surface temperature (SST) anomaly dipole structure between the eastern and central/western tropical Pacific and the weakening of El Niño events since 2000 could be due to natural decadal oscillations in the El Niño background state, the Pacific Decadal Oscillation (PDO). However, the observed atmospheric patterns and the recent increase of the SST anomaly difference between the central and the eastern tropical Pacific resemble structures that also result from climate change simulations


Article of periodic

published at : Erdkunde / ISSN 0014-0015

Editor : Boss, Kleve - ALLEMAGNE (1947)

Millesime : 2011, vol. 65, no2 [pp. 151-167]

Bibliographic references : 3 p.

Collation : 8 fig., 1 tabl.



Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.3112/erdkunde.2011.02.04

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2012
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