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18 February - 24 February
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22 April - 28 April
Tidal range
Tidal range: Difference in height between consecutive high and low waters. Tide period: Rise and fall of the ocean, caused by the gravitational attraction of moon and sun acting on the earth. Tide curve: Presentation of the rise and fall of tide time with reference to it height of the tide. Tide producing force slight local difference between the gravitational attraction of two astronomical bodies and the centrifugal force that holds them apart. Gravitational attraction predominates at the surface point nearest to the other body while centrifugal “ repulsion” predominates at the surface point farthest from the other body. Tide pool: Depression-usually water filled-in the intertidal zone, alternately submerged and exposed by the rise and fall of tide or wave action. Tide tables: tables that predict the times and heights of tidal phenomena at specified locations. Tide wave I the long-period gravity wave that has its origin in the tide- producing force. Tide wave itself in the rising and falling of the tide. Tide winds wind system, in most of the tropics, which blow form the subtropical highs toward the equatorial lows. Trade winds are from the northeast in the northern Hemisphere, from the southeast in the southern hemisphere. Thermocline marked vertical temperature change in a body of water; also a layer in which such a temperature change occurs. Thermohaline circulation induced by differences on water density which is controlled primarily by temperature and salinity. Spring tide of increased range that occurs about every 2 weeks when the moon is new or full. Neap tide lowest range of the tide, occurring near the times of the first and last quarters of the moon. |