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http://dx.doi.org/10.5467/JKESS.2015.36.7.611

Development of Nonlinear Low-Order Climate Model and Simulated ENSO Characteristics  

Wie, Jieun (Division of Science Education/Institute of Fusion Science, Chonbuk National University)
Moon, Byung-Kwon (Division of Science Education/Institute of Fusion Science, Chonbuk National University)
Publication Information
Journal of the Korean earth science society / v.36, no.7, 2015 , pp. 611-616 More about this Journal
Abstract
El Nino and Southern Oscillation (ENSO) presents a broad band (2-8 year) variability and slowly changing amplitude and period, which are respectively referred to as ENSO irregularity and ENSO modulation. In this study, we developed a nonlinear low-order climate model by combining the Lorenz-63 model of nonlinear atmospheric variability and a simple ENSO model with recharge oscillator characteristics. The model successfully reproduced the ENSO-like variations in the sea surface temperature of eastern Pacific, such as the peak period, wide periodicity, and decadal modulations. The results show that the chaotic atmospheric forcing can lead to ENSO irregularity and ENSO modulation. It is also suggested the high probability of La Nina development could be associated with strong convection of the western warm pool. Although it is simple, this model is expected to be used in research on long-term climate change because it well captures the nonlinear air-sea interactions in the equatorial Pacific.
Keywords
ENSO; low-order climate model; ENSO irregularity; ENSO modulation;
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Times Cited By KSCI : 5  (Citation Analysis)
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