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The RAVE survey, combined with proper motions and distance estimates, can beused to study in detail stellar kinematics in the extended solar neighbourhood(solar suburb). Using the red clump, we examine the mean velocity components in3D between an R of 6 and 10 kpc and a Z of -2 to 2 kpc, concentrating onNorth-South differences. Simple parametric fits to the R, Z trends for VPHI andthe velocity dispersions are presented. We confirm the recently discoveredgradient in mean Galactocentric radial velocity, VR, finding that the gradientis more marked below the plane, with a Z gradient also present. The verticalvelocity, VZ, also shows clear structure, with indications of ararefaction-compression pattern, suggestive of wave-like behaviour. We performa rigorous error analysis, tracing sources of both systematic and randomerrors. We confirm the North-South differences in VR and VZ along theline-of-sight, with the VR estimated independent of the proper motions. Thecomplex three-dimensional structure of velocity space presents challenges forfuture modelling of the Galactic disk, with the Galactic bar, spiral arms andexcitation of wave-like structures all probably playing a role.

The wobbly Galaxy: kinematics north and south with RAVE red clump giants