[GTP] Reminder- GTP MMM seminar- Colm Connaughton-- TODAY

[Silvia Gentile]

Silvia Gentile wrote:
> Joint MMM GTP Seminar
>
> Feedback of zonal flows on Rossby/drift-wave turbulence driven by 
> small scale instability
>
> Colm Connaughton
>
> Warwick Mathematics Institute and Warwick Centre for Complexity Science 
> We demonstrate theoretically and numerically the zonal-flow/wave 
> turbulence feedback mechanism in Charney-Hasegama-Mima turbulence 
> forced by a small scale instability. Zonal flows are generated by a 
> secondary modulational instability of the waves which are directly 
> driven by the primary instability. The shear generated by the zonal 
> flows then suppresses the small scale turbulence thereby arresting the 
> energy injection into the system. This process can be described using 
> nonlocal wave turbulence theory. Finally, the arrest of the energy 
> input results in saturation of the zonal flows at a level which can be 
> estimated from the theory and the system reaches stationarity even 
> without large scale damping.
>
> (Joint work with S. Nazarenko and B. Quinn)
>
>
>
> Tuesday July 19
>
> NCAR Foothills Laboratory 1
>
> 3450 Mitchell Lane
>
> Room FL1-2198 EOL Atrium
>
> Lecture 3:30pm
>