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The role of atmosphere feedbacks during ENSO in the CMIP3 models

Lloyd, J., Guilyardi, E., Weller, H. and Slingo, J. M. (2009) The role of atmosphere feedbacks during ENSO in the CMIP3 models. Atmospheric Science Letters, 10 (3). pp. 170-176. ISSN 1530-261X

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To link to this article DOI: 10.1002/asl.227

Abstract/Summary

Several studies using ocean-atmosphere GCMs suggest that the atmospheric component plays a dominant role in the modelled ENSO. To help elucidate these findings, the two main atmosphere feedbacks relevant to ENSO, the Bjerknes positive feedback (µ) and the heat flux negative feedback (), are analysed here in 12 coupled GCMs. We find that the models generally underestimate both feedbacks, leading to an error compensation. The strength of is inversely related to the ENSO amplitude in the models and the latent heat and shortwave flux components of this feedback dominate. Furthermore, the shortwave component could help explain the model diversity in both overall and ENSO amplitude.

Item Type:Article
Refereed:Yes
Divisions:Faculty of Science > School of Mathematical and Physical Sciences > NCAS
Faculty of Science > School of Mathematical and Physical Sciences > Department of Meteorology
ID Code:4321
Uncontrolled Keywords:ENSO; Atmosphere feedbacks; CMIP3 GCMs
Publisher:John Wiley & Sons

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