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Typescript. / Thesis (Ph. D.)--University of Hawaii at Manoa, 1990. / Includes bibliographical references (leaves 279-283) / Microfiche. / xvi, 283 leaves, bound ill. 29 cm

Copies of previously published articles inserted. / Bibliography: p. 185-200. / xxv, 200 p. : ill. author's (some col.) ; 30 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Data obtained from six radar stations covering a wide latitude range has been used to determine the global distribution of planetary waves and tides. In the process a number of data analyses techniques were considered for their characterisation. / Thesis (Ph.D.)--University of Adelaide, Dept. of Physics and Math Physics, 2000

Thesis (Ph. D.)--University of Washington, 1988. / Vita. Includes bibliographical references (leaves [149]-152).

Thesis (Ph.D.)--University of Adelaide, Dept. of Physics and Math Physics, 2000. / Copies of previously published articles inserted. Bibliography: p. 185-200.

Thesis (M.Sc.). / Written for the Dept. of Atmospheric and Oceanic Sciences. Title from title page of PDF (viewed 2008/05/14). Includes bibliographical references.

Thesis (Ph. D.)--Harvard University, 1968. / Includes bibliographies.

Thesis (D.S.)--Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1985. / "October 1985." Includes bibliographical references (p. 251-255).

The breakdown of vertically propagating planetary waves in the stratosphere is investigated using an ultra-high horizontal resolution Contour Dynamics with Surgery model. In the model, planetary waves are forced at the tropopause and propagate upwards through the stratosphere and into an absorbing sponge (the first of its kind for such a model). In the context of wave breaking, two aspects of the system are questioned, namely, (1) what is the sensitivity to upper-boundary conditions? and (2) given perfect upper-boundary conditions what controls wave breaking? (1) In a Boussinesq environment. wave breaking is compared using: (a) a rigid upper-boundary condition (as in previous work) and (b) an absorbing sponge (preventing spurious reflections). In (a) both local (to the forcing) and remote breaking is evidenced for weak forcing while only local breaking is observed for sufficiently strong forcing. In (b) remote breaking is absent and local breaking, which occurs for sufficiently strong forcing, has quite a different character to that seen in (a). Compressibility effects are also investigated. (2) A quasi-linear theory is developed which predicts wave breaking if the zonal mean flow decelerates by more than one-half of its initial value (via positive group-velocity/zonal-mean-flow feedbacks). This so-called “one-half” rule for planetary wave breaking is confirmed through fully-nonlinear simulations. Numerical simulations detail the precise sequence of events leading up to and after wave breaking. / Graduate

Die Ausbreitungspfade und die strukturelle Veränderung von quasi geostrophischen Rossby-Wellenpaketen werden mittels der WKB-Methode untersucht. Es wird angenommen, daß die Wellenpakete an einem in Ost-West-Richtung verlaufenden festen Rand reflektiert werden können. Die Dynamik der Rossby-Wellenpakete wird auf der ß-Ebene aber auch auf der sogenannten d-Oberfiäche - wo auch die zweite Ableitung des Coriolis-Parameters eine Rolle spielt - studiert. Es wird gezeigt, daß die Wellenpakete unter bestimmten Umständen große Entfernungen in zonaler Richtung entlang der Küste zurücklegen können und damit die Strömung weit stromab beeinflussen. Die Wellenpakete sind dabei zwischen dem reflektierenden Rand und einer Umkehrbreite gefangen im Unterschied zu freien Rossbywellen in der Atmosphäre, die zwischen zwei Umkehrbreiten gefangen werden können. Es zeigt sich, daß der d-Term keine besonders wichtige Rolle für die Ausbreitung der Rossby-Wellenpakete spielt, am wichtigsten ist er noch bei der Dynamik von Wellen mit negativer Phasengeschwindigkeit. Es wird vorgeschlagen, daß ein selektiver Rossby-Wellenleiter wie er hier diskutiert wird eine Rolle in der Dynamik des Antarktik-Zirkumpolarstromes spielt. / We study the propagation and the structural change of quasi geostrophic Rossby wave packets by means of a WKB-method. Our approach involves the introduction of a rigid boundary, where the wave packets can be refiected elastically. We study Rossby wave packet dynamics at high latitudes on a modified ß-plane, where the second derivative of the Coriolis parameter with respect to latitude is taken into account (d-term). We show that under certain conditions synoptic-scale wave packets can propagate far distances along an east-west oriented \'coast\' and may affect the fiow far downstream of the source region. In contrast to free propagating Rossby wave packets ( e.g. in the atmosphere), which can be trapped between two turning latitudes, the wave packets considered here are trapped between a turning latitude and the reflecting boundary. lt turns out that the 6-term is most important for wave packets with negative phase speeds. Finally, we suggest that such a selective Rossby waveguide may play a role in the dynamics of the Antarctic Circumpolar Current.