Discontinuity: Comparatively large contrast in meteorological elements over a relatively small distance or period of time. In oceanography, it is the abrupt change or jump of a variable at a line or surface.

 

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Discontinuity: Comparatively large contrast in meteorological elements over a relatively small distance or period of time. In oceanography, it is the abrupt change or jump of a variable at a line or surface.

Mohorovic Discontinuity: The boundary between crust and mantle, marked by a rapid increase in seismic wave velocity to more than 8 kilometers per second. Depth: 5 to 45 kilometers. Abbreviated 'Moho' or 'M-discontinuity.'

Redox-Potential Discontinuity: That depth below the sediment-water interface marking the transition from chemically oxidative to reducing processes

Seismic Discontinuity: A surface within the Earth across which P-wave or S-wave velocities change rapidly, usually by more than +~0.2 kilometer/second.

Seismic Transition Zone: A seismic discontinuity, found in all parts of the Earth, at which the velocity increases rapidly with depth: especially the one at 300 to 600 kilometers.

Internal Tide: A tidal wave propagating along a sharp density discontinuity, such as a thermocline, or in an area of gradually changing (vertically) density.

Front: The transition zone or interface between two air masses of different densities, which usually means different temperatures. For example, the area of convergence between warm, moist air and c . . . View Full Definition

Progressive Wave: A wave that advances in distance along the sea surface or at some intermediate depth. Although the wave form itself travels significant distances, the water particles that make up the wave m . . . View Full Definition