kelvin wave sentence in Hindi
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- The primitive equations are identical to those used to develop the coastal Kelvin wave phase speed solution ( U-momentum, V-momentum, and continuity equations ) and the motion is unidirectional and parallel to the equator.
- Geostrophic current anomaly, like a Kelvin wave signature propagating eastward to South America between December and April can be easily discerned, and this arrival to South America also coincided with the above-mentioned SST anomaly onset.
- Coastal Kelvin waves follow shorelines and will always propagate in a counterclockwise direction in the Northern hemisphere ( with the shoreline to the right of the direction of travel ) and clockwise in the Southern hemisphere.
- Note that for motion toward the west, the Coriolis force would not restore a northward or southward deviation back toward the equator; thus, equatorial Kelvin waves are only possible for eastward motion ( as noted above ).
- Rossby waves then enter the equation and, as previously stated, move at lower velocities than the Kelvin waves and can take anywhere from nine months to four years to fully cross the Pacific Ocean basin ( from boundary to boundary ).
- These weakening easterly winds not only subdue the amount of cool water upwelling to the sea's surface from the chilly depths below, but also generate a pulse of warm water that propagates eastward from the western Pacific, known as a Kelvin wave.
- These easterly winds can transfer West Pacific warm water toward the east, thereby exciting a Kelvin wave, which in this sense can be thought of as a warm-water anomaly that travels under the ocean s surface at a depth of about 150 meters.
- In a stratified ocean of mean depth " H ", free waves propagate along coastal boundaries ( and hence become trapped in the vicinity of the coast itself ) in the form of internal Kelvin waves on a scale of about 30 km.
- Discovered by Lord Kelvin, coastal Kelvin waves are trapped close to coasts and propagate along coasts in the Northern Hemisphere such that the coast is to the right of the alongshore direction of propagation ( and to the left in the Southern Hemisphere ).
- Moore ( 1968 ) found that as an equatorial Kelvin wave strikes an " eastern boundary, " part of the energy is reflected in the form of planetary and gravity waves; and the remainder of the energy is carried poleward along the eastern boundary as coastal Kelvin waves.
- Moore ( 1968 ) found that as an equatorial Kelvin wave strikes an " eastern boundary, " part of the energy is reflected in the form of planetary and gravity waves; and the remainder of the energy is carried poleward along the eastern boundary as coastal Kelvin waves.
- The equatorial zone essentially acts as a waveguide, causing disturbances to be trapped in the vicinity of the equator, and the equatorial Kelvin wave illustrates this fact because the equator acts analogously to a topographic boundary for both the Northern and Southern Hemispheres, making this wave very similar to the coastally-trapped Kelvin wave.
- The equatorial zone essentially acts as a waveguide, causing disturbances to be trapped in the vicinity of the equator, and the equatorial Kelvin wave illustrates this fact because the equator acts analogously to a topographic boundary for both the Northern and Southern Hemispheres, making this wave very similar to the coastally-trapped Kelvin wave.
- For the first baroclinic mode in the ocean, a typical phase speed would be about 2.8 m / s, causing an equatorial Kelvin wave to take 2 months to cross the Pacific Ocean between New Guinea and South America; for higher ocean and atmospheric modes, the phase speeds are comparable to fluid flow speeds.
- During June to August, southeasterlies of the coastally trapped Kelvin waves and serve to reduce the ITF flow with a minimum in April of 9 Sv . Another way to think about it is that downwelling on the Indian Ocean side increases sea level and so reduces the normal Pacific-to-Indian pressure head reducing the flow.
- Equatorial Kelvin waves behave somewhat as if there were a wall at the equator so that the equator is to the right of the direction of along-equator propagation in the Northern Hemisphere and to the left of the direction of propagation in the Southern Hemisphere, both of which are consistent with eastward propagation along the equator.
- Using the assumption that the cross-shore velocity " v " is zero at the coast, " v " = 0, one may solve a frequency relation for the phase speed of coastal Kelvin waves, which are among the class of waves called boundary waves, edge waves, trapped waves, or surface waves ( similar to the Lamb waves ).
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