HR: 16:45h
AN: A24A-03    [Abstracts]
TI: Decadal Variations in the Madden-Julian Oscillation
AU: * Jones, C
EM: cjones@icess.ucsb.edu
AF: University of California Santa Barbara, ICESS University of California, Santa Barbara, CA 93106 United States
AU: Carvalho, L M
EM: leila@icess.ucsb.edu
AF: University of California Santa Barbara, ICESS University of California, Santa Barbara, CA 93106 United States
AB: The Madden-Julian Oscillation (MJO) is the main mode of tropical intraseasonal variability. The MJO strongly influences the precipitation patterns associated with the monsoons in Asia, Australia, North America and South America. This influence has been shown to modulate rainfall variability and extreme events in the Americas as well. Some studies have additionally indicated that interaction of the MJO with extra-tropical regions can influence weather forecasts on medium and extended ranges. This study presents an observational analysis to characterize decadal changes in the MJO. It is shown that the MJO exhibits significant decadal chages alternating in regimes of high and low activity. These regimes seem to alternate in cycles of about 6 yrs and 14 yrs.
DE: 1620 Climate dynamics (3309)
DE: 3309 Climatology (1620)
SC: Atmospheric Sciences [A]
MN: 2005 Joint Assembly