  This paper examines the influence of neutral dynamics on the high latitude
ionosphere. Using a longitudinal chain of ionosondes at high northern latitudes
($52\,^{\circ}{\rm}$-$65\,^{\circ}{\rm}$N), planetary wave-like structures were
observed in the spatial structure of the peak electron density in the
ionosphere. Longitudinal wavenumbers S$_{0}$, S$_{1}$ and S$_{2}$ have been
extracted from these variations of the F layer. The observed wave activity in
wavenumber one and two does not show any significant correlation with indices
of magnetic activity, suggesting that this is not the primary driver. In
addition, the motion of the S$_{1}$ ionospheric wave structures parallels that
of the S$_{1}$ planetary waves observed in the winds of the
mesosphere-lower-thermosphere derived from a longitudinal array of SuperDARN
meteor-radar wind measurements. The time delay between the motions of the wave
structures would indicate a indirect coupling, commensurate with the diffusion
to the ionosphere of mesospheric atomic oxygen perturbations.
