464 On the Nonlinear Kinetic Energy Transfer Between MJO and Synoptic Scales

Monday, 11 January 2016
Sarvesh Kumar Dubey, Florida State University, Tallahassee, FL; and T. N. Krishnamurti

In our study, we used cross-correlation technique to study the triad-interactions involved in nonlinear kinetic energy transfer between MJO and other time scales. As is well know that arbitrary wave-wave interactions are not feasible and only those interactions are physically possible in which certain orthogonal properties are satisfies. Theretofore MJO time scales could only communicate with a few other specific time scales. Instances, when other two frequencies of this wave-wave triad interaction belongs to synoptic scales is of our primal interest. In fact, our work emphasis how the MJO time scale interact with other time scales, in particular with the synoptic time scales in tropics in terms of nonlinear kinetic energy transfer. In this study, we used six hourly Era-interim data for 366 days, in which data for the moths October, November and December 2011 were replaces by the Dynamo data. Our study points out that in the region of our study MJO is maintained by interaction with other time scales. As synoptic scale features are very dominating in tropical region and carry significant amount of energy, our study put special focus on MJO and Synoptic interaction. we present details of this nonlinear KE transfer along with its horizontal and vertical variability.
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