OS51A-1973
The Potential Vorticity Budget of Multi-Scale MJO Models
Friday, 18 December 2015
Poster Hall (Moscone South)
Amanda Back, University of California Davis, Mathematics, Davis, CA, United States, Joseph A Biello, University of California Davis, Davis, CA, United States and Andrew Majda, New York University, New York, NY, United States
Abstract:
Zhang and Ling (J. Atmos. Sci. 2012) performed a comprehensive analysis of the potential vorticity budget of the Madden-Julian Oscillation throughout its initiation and evolution. Biello and Majda have used the Intraseasonal Planetary Equatorial Synoptic-Scale Dynamics (IPESD) framework of Majda and Klein (J. Atmos. Sci. 2003) to create kinematic models of the MJO which distinguish MJO events forced by large-scale heating from MJO events forced by the upscale fluxes of momentum and temperature from the synoptic scales. In the present study, the results of Zhang and Ling provide a benchmark for comparing the different multi-scale MJO models. In particular, a potential vorticity budget can be obtained in the multiscale framework, and the advection, in-scale generation and upscale transfer of PV are considered.
