Figure caption: DJF seasonal average of I: Advection of potential vorticity by the divergent part of the wind (PVU s−1 ) at 350 K (shaded) with boxed regions (pink) and the 350 K jet isotachs [20, 25, 30, 35] ms−1 (green contours)
Motivated by recent studies on significant weather patterns in Australia, in this talk I will investigate the life cycle of summertime transient Rossby wave packets in the Southern Hemisphere.
A variable, I, representing the strength of the interaction between wave packets and the jet stream is used as the basis for composites in 5 regions of the Southern Hemisphere. In each case, cyclogenesis precedes a very clear transient Rossby wave packet. While in most cases, waves propagate far downstream, in some they also refract strongly equatorward and are associated with enhanced tropical convection. I will discuss the characteristics of the different wave behaviours and their associated weather patterns.
In addition, I will summarise my new role at UCD and proposed research that I will undertake with Conor Sweeney's group through the Energy Systems Integration partnership Programme (ESIPP).
Figure caption: DJF seasonal average of I: Advection of potential vorticity by the divergent part of the wind (PVU s−1 ) at 350 K (shaded) with boxed regions (pink) and the 350 K jet isotachs [20, 25, 30, 35] ms−1 (green contours)