Recorded presentation8A.2
Recent intensification of ENSO-MJO interaction
Jong-Seong Kug, University of Hawaii, Honolulu, HI; and F. F. Jin, A. Timmermann, and I. S. Kang
Concurrently with the continuous rise of atmospheric greenhouse gas concentrations, tropical Pacific sea-surface temperatures (SST) have increased significantly during the second half of the 20th century. Our observational analysis suggests that in this period the equatorial-Pacific intraseasonal surface-wind variability is significantly increased. In addition, its nonlinear interaction with the interannual El Niņo-Southern Oscillation (ENSO) have intensified substantially. These changes led to an increase in the El Niņo activity and the emergence of a new warm-pool El Niņo regime. State-of-the-art coupled general circulation models (CGCMs) simulate a future enhancement of the intraseasonal surface-wind variability in the equatorial Pacific in response to an atmospheric greenhouse gas increase, with potential repercussions for future El Niņo activity. Recorded presentation
Session 8A, General Climate Studies: Variability (ENSO, MJO, NAO, etc.)
Tuesday, 22 January 2008, 3:30 PM-5:30 PM, 215-216
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