scholarly journals Symmetry of Kelvin-wave dynamics and the Kelvin-wave cascade in theT=0superfluid turbulence

2012 ◽  
Vol 85 (10) ◽  
Author(s):  
E. B. Sonin
Keyword(s):  
Kelvin Wave ◽  
Wave Dynamics ◽  
Wave Cascade

scholarly journals Long-Wave Dynamics of Sea Level Variations during Indian Ocean Dipole Events

2009 ◽  
Vol 39 (5) ◽  
pp. 1115-1132 ◽  
Author(s):  
Dongliang Yuan ◽  
Hailong Liu
Keyword(s):  
Indian Ocean ◽  
Sea Level ◽  
Indian Ocean Dipole ◽  
Rossby Waves ◽  
Western Boundary ◽  
Kelvin Wave ◽  
Wave Pulse ◽  
Wave Dynamics ◽  
Long Wave ◽  
Equatorial Rossby Waves

Abstract Long-wave dynamics of the interannual variations of the equatorial Indian Ocean circulation are studied using an ocean general circulation model forced by the assimilated surface winds and heat flux of the European Centre for Medium-Range Weather Forecasts. The simulation has reproduced the sea level anomalies of the Ocean Topography Experiment (TOPEX)/Poseidon altimeter observations well. The equatorial Kelvin and Rossby waves decomposed from the model simulation show that western boundary reflections provide important negative feedbacks to the evolution of the upwelling currents off the Java coast during Indian Ocean dipole (IOD) events. Two downwelling Kelvin wave pulses are generated at the western boundary during IOD events: the first is reflected from the equatorial Rossby waves and the second from the off-equatorial Rossby waves in the southern Indian Ocean. The upwelling in the eastern basin during the 1997–98 IOD event is weakened by the first Kelvin wave pulse and terminated by the second. In comparison, the upwelling during the 1994 IOD event is terminated by the first Kelvin wave pulse because the southeasterly winds off the Java coast are weak at the end of 1994. The atmospheric intraseasonal forcing, which plays an important role in inducing Java upwelling during the early stage of an IOD event, is found to play a minor role in terminating the upwelling off the Java coast because the intraseasonal winds are either weak or absent during the IOD mature phase. The equatorial wave analyses suggest that the upwelling off the Java coast during IOD events is terminated primarily by western boundary reflections.

scholarly journals Detiding Shipboard ADCP Data in Eastern Boundary Current

2011 ◽  
Vol 28 (1) ◽  
pp. 94-103 ◽  
Author(s):  
Heriberto Jesus Vazquez ◽  
Jose Gomez-Valdes ◽  
Modesto Ortiz ◽  
Juan Adolfo Dworak
Keyword(s):  
Least Squares ◽  
Baja California ◽  
Gaussian Function ◽  
Kelvin Wave ◽  
Boundary Current ◽  
Mean Flow ◽  
Wave Dynamics ◽  
Eastern Boundary ◽  
Eastern Boundary Current ◽  
Adcp Data

Abstract Spatiotemporal fitting by the least squares method is commonly applied to distinguish the mean flow from the tidal current from shipboard ADCP data in coastal ocean. To analyze this technique in a pelagic region of an eastern boundary current system, a 6-yr period of shipboard ADCP data off Baja California is examined. A diverse set of basis functions is studied and a global tidal model is used for comparison purposes. The Gaussian function together with a nodal configuration of one node in the middle and close to the coast of the region is the best option. However, to obtain the optimal solution, the geostrophic flow, which is stronger than the tidal flow and highly variable off Baja California, might be removed prior to fitting the data. In general, the semimajor axis of the tidal ellipse (M2) is parallel to the coast and the phase speed is poleward and parallel to the coast, in agreement with Kelvin wave dynamics. Because the tides in eastern boundary currents are explained by Kelvin wave dynamics, the use of both the velocity field without geostrophic variability and the Gaussian function in the spatiotemporal fitting by least squares technique is a promising tool for detiding shipboard ADCP data from these systems.

scholarly journals Amplitude of Waves in the Kelvin-Wave Cascade

JETP Letters ◽  
2020 ◽  
Vol 111 (7) ◽  
pp. 389-391 ◽  
Author(s):  
V. B. Eltsov ◽  
V. S. L’vov
Keyword(s):  
Kelvin Wave ◽  
Wave Cascade
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