Mesospheric airglow oscillations, with periods longer than a few hours, are often considered manifestations of tidal perturbations. For example, a 24 hour signature in equatorial O(1S) airglow observed by the WINDII instrument has been attributed to the affect of vertical advection of atomic oxygen by the diurnal propagating tide. Recently, 8-hr variations have been seen in both OH airglow and temperatures at the Bear Lake Observatory (41.9N, 111.4W) and dynamical fields observed by the Sondre Stromfjord incoherent scatter radar. It remains to be determined if these variations are consistent with perturbations induced by the terdiurnal tide. The relative roles of temperature, density and advective perturbations have yet to be elucidated. We invite all interested parties to contribute relevant observations and/or theoretical results to a discussion of this phenomenon.
We will adhere to a workshop format, with significant time available for discussions. Presentations should be kept short (a few viewgraphs / ten minutes or less). Speakers and titles are:
Contact Dan Marsh - marsh@ucar.edu (303) 497-1566 or Chris Meyer - meyer@colorado-research.com (303-415-9701 x228) if you wish to contribute or have further questions.