a method for detecting and locating objects submerged in water by echolocation.
an episodic movement of warm surface water south along the coast of Peru associated with the cessation of upwelling in this region
A long and broad submarine DEPRESSION with gently sloping sides.
a geological process in which one edge of a crustal plate is forced sideways and downward into the mantle below another plate
The length of unobstructed OPEN SEA surface across which the wind can generate WAVES
a wave, especially when long and unbroken, or a series of such waves.
the point nearest the sun in the orbit of a celestial body
A downward movement (sinking) of surface water caused by ONSHORE EKMAN TRANSPORT, converging CURRENTS, or when a water mass becomes more dense than the surrounding water.
A long narrow submarine DEPRESSION with relatively steep sides.
identifiable body of water with a common formation history which has physical properties distinct from surrounding water. Properties include temperature, salinity, chemical - isotopic ratios, and other physical quantities.
an apparent deflection of a freely moving object caused by the Earth's rotation
average tides that occur between full and new moons.
The portion of the tidal cycle between LOW WATER and the following HIGH WATER
a current of cold, nutrient-rich water rising to the surface.
Type of TIDE which the presence of a diurnal wave is conspicious by a large inequality in either the high or LOW WATER heights with two high waters and two low waters usually occurring each TIDAL DAY.
powerful seismic sea wave that can travel thousands of kilometers in all directions and that begins over an earthquake focus
The mixing of fresh and salt water here creates a unique environment that brims with life of all kinds.
a reef that is attached to the shore of an island or continent with no open water lagoon between the reef and the shore
difference between high and low tide.
The periodic rising and falling of the water that results from gravitational attraction of the moon and sun acting upon the rotating earth.
A long narrow accumulation of SAND, lying generally in line with the COAST, with one end attached to the land the other projecting into the SEA or across the mouth of an ESTUARY.