Abstract
Abstract This paper is concerned with the forcing of the low-frequency variability (10 days up to 3 months) of the barotropic planetary waves (wavenumbers 1 to 4) for wintertime conditions in the Northern Hemisphere. In particular, the forcing by the transient vorticity fluxes arising from the interactions between the planetary waves and the synoptic-scale eddies is considered. This forcing effect is stochastically modeled in terms of a combined Markov-complex EOF approach. The performance of these stochastically modeled vorticity fluxes is evaluated in the framework of a simple barotropic dynamical model. It turns out that the forcing is highly coherent in wavenumber space, i.e., local in physical space, and that this organization is largely associated with its low-frequency components. The simple dynamical model with the modeled forcing is able to reproduce reasonably well the spatial structure of the observed low-frequency variance of the planetary waves. The performance is best if only the low-frequen...
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.