seiche

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Related to Seiches: tsunami, Soil liquefaction

seiche:

see wavewave,
in oceanography, an oscillating movement up and down, of a body of water caused by the frictional drag of the wind, or on a larger scale, by submarine earthquakes, volcanoes, and landslides.
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, in oceanography.

Seiche

 

a standing wave of long period (from several minutes to tens of hours) that arises in large or small enclosed basins of water, such as seas, lakes, and bays. Seiches result from the interference of waves created by external forces, for example, sharp changes in atmospheric pressure, wind, or seismic phenomena, with waves reflected from the end of the basin. Seiches involve oscillation of the entire mass of water, so that there always exist one or more lines (points a and a’ in Figure 1, a and b), called nodes or nodal lines, along which the level does not change.

Figure 1

Seiches may be mononodal (Figure l, a), binodal (Figure l, b), and so forth, with amplitudes from a few millimeters to several meters. For example, seiches in Lake Geneva have attained an amplitude of 2 m with a period of more than I hr. In the Bay of Algiers seiches have attained amplitudes as high as 1 m and periods somewhat longer than 1 min, and in the Sea of Azov seiches with periods up to 23 hr and amplitudes of 10–25 cm have been reported.

seiche

[sāsh]
(fluid mechanics)
An oscillation of a fluid body in response to the disturbing force having the same frequency as the natural frequency of the fluid system.
(oceanography)
A standing-wave oscillation of an enclosed or semienclosed water body, continuing pendulum-fashion after cessation of the originating force, which is usually considered to be strong winds or barometric pressure changes.
References in periodicals archive ?
Deputy Interior Minister Esmail Najjar said the wave was estimated at more than three meters (10 feet) high, though that would be unusually big for a seiche and was probably an exaggeration.
Initial data analysis has identified oscillations in the surface temperature along the crater sidewalls, suggesting the presence of seiches in the crater-floor cold pool.
Coast Guard, state park authorities, Ottawa County Board of Supervisors, and city officials, to study the seiche and to propose precautions to prevent future drownings.
Generation of seiches by cold fronts over the southern North Sea JOURNAL OF GEOPHYSICAL RESEARCH, VOL.
Seiches could possibly occur on Grand Lake and other small lakes within the province.
Las variaciones en la capa superficial, la distribucion de nutrientes y sedimentos suspendidos son grandemente controlados por el desplazamiento vertical debido principalmente a la mezcla causada por la dinamica interna del lago que pueden ser las ondas internas y seiches.
Historical examples of earthquake-generated seiches are given by the particularly severe seiche activities that were recorded in Europe following the Portuguese earthquake that occurred in Lisbon in 1755 (Myles, 1985).
De Jong and his colleagues discovered that each of the 51 seiches in Rotterdam's harbor from 1995 to 2001 that sloshed higher than 25 centimeters occurred as a cold front passed through the area.
The low-lying shore topography, shallow lake basins, re-occurring storms, wind set-up and seiches, have caused periodic but regular flooding especially at the western and eastern ends of the lake.
In larger estuaries, long wavelike oscillations of the water surface, called seiches, akin to water sloshing in a dishpan, were revealed as an important mode of motion (see Oceanus, Spring 1993).
In an earthquake, smaller versions of oceanic tidal waves (tsunamis) occur in lakes; these are called seiches.
1) Wyrtkis ideas on remote forcing and basin-scale responses during El Nino were inspired in part by studies of seiches in the Baltic Sea early in his career (Wyrtki 1952; Speidel 2006).