scholarly journals Mixing by Non-linear Gravity Wave Breaking on a White Dwarf Surface

2002 ◽  
Author(s):  
A. C. Calder
Keyword(s):  
Gravity Wave ◽  
White Dwarf ◽  
Wave Breaking ◽  
Non Linear ◽  
Linear Gravity

Non-linear gravity wave interactions

1962 ◽  
Vol 14 (04) ◽  
pp. 577 ◽  
Author(s):  
D. J. Benney
Keyword(s):  
Gravity Wave ◽  
Wave Interactions ◽  
Non Linear ◽  
Linear Gravity

The Interaction of Katabatic Flow and Mountain Waves. Part II: Case Study Analysis and Conceptual Model

2007 ◽  
Vol 64 (6) ◽  
pp. 1857-1879 ◽  
Author(s):  
Gregory S. Poulos ◽  
James E. Bossert ◽  
Thomas B. McKee ◽  
Roger A. Pielke
Keyword(s):  
Conceptual Model ◽  
Gravity Wave ◽  
Wave Breaking ◽  
Gradient Force ◽  
Pressure Gradient Force ◽  
Wave System ◽  
Katabatic Flow ◽  
Mountain Wave ◽  
Mountain Waves ◽  
Wave Evolution

Via numerical analysis of detailed simulations of an early September 1993 case night, the authors develop a conceptual model of the interaction of katabatic flow in the nocturnal boundary layer with mountain waves (MKI). A companion paper (Part I) describes the synoptic and mesoscale observations of the case night from the Atmospheric Studies in Complex Terrain (ASCOT) experiment and idealized numerical simulations that manifest components of the conceptual model of MKI presented herein. The reader is also referred to Part I for detailed scientific background and motivation. The interaction of these phenomena is complicated and nonlinear since the amplitude, wavelength, and vertical structure of the mountain-wave system developed by flow over the barrier owes some portion of its morphology to the evolving atmospheric stability in which the drainage flows develop. Simultaneously, katabatic flows are impacted by the topographically induced gravity wave evolution, which may include significantly changing wavelength, amplitude, flow magnitude, and wave breaking behavior. In addition to effects caused by turbulence (including scouring), perturbations to the leeside gravity wave structure at altitudes physically distant from the surface-based katabatic flow layer can be reflected in the katabatic flow by transmission through the atmospheric column. The simulations show that the evolution of atmospheric structure aloft can create local variability in the surface pressure gradient force governing katabatic flow. Variability is found to occur on two scales, on the meso-β due to evolution of the mountain-wave system on the order of one hour, and on the microscale due to rapid wave evolution (short wavelength) and wave breaking–induced fluctuations. It is proposed that the MKI mechanism explains a portion of the variability in observational records of katabatic flow.

scholarly journals On the non-linear energy transfer in a gravity-wave spectrum. Part 3. Evaluation of the energy flux and swell-sea interaction for a Neumann spectrum

1963 ◽  
Vol 15 (3) ◽  
pp. 385-398 ◽  
Author(s):  
K. Hasselmann
Keyword(s):  
Energy Transfer ◽  
Gravity Wave ◽  
Wave Spectrum ◽  
Low Frequency ◽  
Low Frequencies ◽  
Frequency Peak ◽  
Non Linear ◽  
Gain Energy ◽  
Rate Of Decay ◽  
Linear Interactions

The energy transfer due to non-linear interactions between the components of a gravity-wave spectrum discussed in Parts 1 and 2 of this paper is evaluated for a fully and partially developed Neumann spectrum with various spreading factors. The characteristic time scales of the energy transfer are found to be typically of the order of a few hours. In all cases the high frequencies and the low-frequency peak are found to gain energy from an intermediate range of frequencies. The transfer of energy to very low frequencies and to waves travelling at large angles to the main propagation direction of the spectrum is negligible. Computations are presented also for the rate of decay of swell interacting with local wind-generated seas (represented by a Neumann spectrum). An appreciable decay is found only for swell frequencies in the same range as those of the local sea.

scholarly journals Evidence of gravity wave breaking in lidar data from the mesopause region

2003 ◽  
Vol 30 (4) ◽  
Author(s):  
Patricia Minthorn Franke ◽  
Richard L. Collins
Keyword(s):  
Gravity Wave ◽  
Wave Breaking ◽  
Lidar Data ◽  
Mesopause Region

scholarly journals Numerical simulation of gravity wave breaking in the lower thermosphere

2012 ◽  
Vol 117 (D21) ◽  
pp. n/a-n/a ◽  
Author(s):  
Thomas S. Lund ◽  
David C. Fritts
Keyword(s):  
Numerical Simulation ◽  
Gravity Wave ◽  
Wave Breaking ◽  
Lower Thermosphere

scholarly journals Local mean state changes due to gravity wave breaking modulated by the diurnal tide

2000 ◽  
Vol 105 (D10) ◽  
pp. 12381-12396 ◽  
Author(s):  
Han-Li Liu ◽  
Maura E. Hagan ◽  
Raymond G. Roble
Keyword(s):  
Gravity Wave ◽  
Wave Breaking ◽  
Diurnal Tide ◽  
Local Mean ◽  
State Changes ◽  
Mean State
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