Initialization of unstable coupled systems by breeding ensembles

Shu Chih Yang, Ming Cai, Malaquias Peña, Eugenia Kalnay

Research output: Contribution to journalConference articlepeer-review


Experiments with breeding, which is a process that mimics ensemble data assimilation were carried out for possible isolation of the slow coupled instabilities in the background flow. The bred perturbations were defined as the difference between the two nonlinear runs at the end of the month and are rescaled and added to the new analysis. It was found during the experimentation there was a spurt of growth preceding the two El Nino and La Nina episodes. The results suggests that breeding with long rescaling intervals can be used to capture the slowly evolving ENSO component of a coupled model.

Original languageEnglish
Pages (from-to)4549-4557
Number of pages9
JournalBulletin of the American Meteorological Society
StatePublished - 2004
EventCombined Preprints: 84th American Meteorological Society (AMS) Annual Meeting - Seattle, WA., United States
Duration: 11 Jan 200415 Jan 2004


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