Spelling suggestions: "subject:"gravity waves"" "subject:"ravity waves""
1 
Hemispheric determinations of vertical fluxes of energy and horizontal momentum by gravity waves using free floating constant density balloonsMassman, William Joseph. January 1900 (has links)
ThesisWisconsin. / Vita. Includes bibliographical references (leaves 161165).

2 
Utilization of satellite and surface observations in a gravity wave studyPecnick, Michael Jeffery. January 1977 (has links)
ThesisWisconsin. / Includes bibliographical references (leaves 3031).

3 
Waves and balanced mean flows in the atmosphereBuehler, Oliver January 1996 (has links)
No description available.

4 
Inertiagravity wave generation : a WKB approachAspden, Jonathan Maclean January 2011 (has links)
The dynamics of the atmosphere and ocean are dominated by slowly evolving, largescale motions. However, fast, smallscale motions in the form of inertiagravity waves are ubiquitous. These waves are of great importance for the circulation of the atmosphere and oceans, mainly because of the momentum and energy they transport and because of the mixing they create upon breaking. So far the study of inertiagravity waves has answered a number of questions about their propagation and dissipation, but many aspects of their generation remain poorly understood. The interactions that take place between the slow motion, termed balanced or vortical motion, and the fast inertiagravity wave modes provide mechanisms for inertiagravity wave generation. One of these is the instability of balanced flows to gravitywavelike perturbations; another is the socalled spontaneous generation in which a slowly evolving solution has a small gravitywave component intrinsically coupled to it. In this thesis, we derive and study a simple model of inertiagravity wave generation which considers the evolution of a smallscale, small amplitude perturbation superimposed on a largescale, possibly timedependent °ow. The assumed spatialscale separation makes it possible to apply a WKB approach which models the perturbation to the flow as a wavepacket. The evolution of this wavepacket is governed by a set of ordinary differential equations for its position, wavevector and its three amplitudes. In the case of a uniform flow (and only in this case) the three amplitudes can be identifed with the amplitudes of the vortical mode and the two inertiagravity wave modes. The approach makes no assumption on the Rossby number, which measures the timescale separation between the balanced motion and the inertiagravity waves. The model that we derive is first used to examine simple timeindependent flows, then flows that are generated by point vortices, including a pointvortex dipole and more complicated flows generated by several point vortices. Particular attention is also paid to a flow with uniform vorticity and elliptical streamlines which is the standard model of elliptic instability. In this case, the amplitude of the perturbation obeys a Hill equation. We solve the corresponding Floquet problem asymptotically in the limit of small Rossby number and conclude that the inertiagravity wave perturbation grows with a growth rate that is exponentially small in the Rossby number. Finally, we apply the WKB approach to a flow obtained in a baroclinic lifecycle simulation. The analysis highlights the importance of the Lagrangian time dependence for inertiagravity wave generation: rapid changes in the strain field experienced along wavepacket trajectories (which coincide with fluidparticle trajectories in our model) are shown to lead to substantial wave generation.

5 
Experimental Study of Gravity Standing Waves FieldHo, ChunYeh 11 February 2003 (has links)
ABSTRACT
This paper treats the standing waves formed by two progressive waves possessing same properties but opposite direction in stationary atmosphere and uniform depth. The thirdorder approximation to twowave trains interactions obtained by Chen¡]1990¡^is cited. From the solution that can be reduced to the cases such as standing waves, the properties resulted in standing wave due to the nonlinear interactions between two wave trains intersection, particularly, the two peaks of wave pressure, are described clearly. Furthermore, the profile, pressure and angular frequency is also verified in good agreement with the experimental results.

6 
A case study of gravity waveconvective storm interactions, 9 May 1979Stobie, James George 12 1900 (has links)
No description available.

7 
The effect of weak nonlinearity on vertically propagating internal gravity waves in the atmosphere /Ibrahim, Mostafa M. January 1982 (has links)
The linear and weakly nonlinear limits of twodimensional gravity waves in an incompressible, inviscid and stably stratified atmosphere are studied. The linear results indicate the growth of waves propagating upward leading to the breakdown of the linear theory. The threewave resonant interaction theory indicates an energy cascade from a vertically propagating wave (primary wave) to waves having smaller absolute values of Doppler shifted frequency ((OMEGA)). When the nondimensional parameter / (DIAGRAM, TABLE OR GRAPHIC OMITTED...PLEASE SEE DAI) / is in the range "1 to about 0.8" (N being the BruntVaisala frequency), the energy of the primary wave is transferred to bands of small amplitude waves. The triads in these bands include a member with the same vertical group velocity as the primary wave while other triads contain a member with larger vertical group velocity. The band widths approach zero as the primary wave amplitude is reduced. The analysis suggests that the threewave resonant interactions should be replaced by a higher order approximation in this limit.

8 
Application of homomorphic deconvolution to gravitational and magnetic potential field dataPapazis, Pendelis Papastogiannou. January 1979 (has links)
No description available.

9 
Mathematical models of acoustic and acousticgravity wave propagation in fluids with heightdependent sound velocitiesKinney, Wayne Alan 08 1900 (has links)
No description available.

10 
Gravity wave motions in the troposphere and lower stratosphere / by Simon J. Allen.Allen, Simon J. January 1996 (has links)
Copy of author's previously published article inserted. / Bibliography: p. 239253. / xxx, 253, [42] p. : ill. ; 30 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / This thesis is concerned with the determination of gravity wave characteristics using operational radiosondes. / Thesis (Ph.D.)University of Adelaide, Dept. of Physics and Mathematical Physics, 1996?

Page generated in 0.0361 seconds