Tide
* Determine high and low tides at international ports.
* Most tide influences water levels.
* Some tide kills fish.
* act to move water up and down daily.
* affect many facets of circulation and mixing in continental shelf areas.
* also affect fishing along river mouths
  - calculates the moon phases and the tide's coefficients
  - cause currents
  - determine the level at which storm waves attack the beach and frontal dunes
  - differ in height on a daily basis
  - have important influences upon Arctic sea ice
  - transfer spin from the Earth to the Moon
* also vary from place to place
  - with winds, ocean currents, atmospheric pressure, etc
* are a gravitational phenomenon.
* are also important in ocean margin processes
  - responsible for a number of other curiosities in the solar system
  - small in the Mediterranean
  - created because the Earth and the moon are attracted to each other
  - cyclical and closely follow the phases of the moon
  - different than waves although tides can affect wave height
  - especially important for beach fishing
  - higher on the full and new moons and are called the spring, drain or full tides
  - highest when the gravitational pull of the moon and sun are along the same line
  - important agents of sediment redistribution over the beach
  - limited by the narrow connection with the Atlantic Ocean
  - more predictable than wave power or wind power
* are most extreme when the moon is in perigee or closest to the earth
  - noticeable at shorelines where oceans and continents meet
  - oceanic waves of very long wavelength and generally small amplitudes in deep water
  - part of nature, like day and night
  - periodic primarily because of the cyclical influence of the Earth's rotation
  - produced by the gravitational attraction of the sun and the moon upon the earth
  - regular fluctuations in sea level caused by the gravitational forces of the sun and moon
  - semi-diurnal, with significant diurnal asymmetries
  - slow-moving water waves with long wavelengths
* are the daily or twice daily movement of water in and out of an estuary or coastal area
  - rising and falling of the ocean waters
  - effect that the moon and the sun have on the oceans
  - largest single factor contributing to sea level changes in California
  - metronome of the oceans
* are the periodic rise and fall of water level along coastlines
  - falling of large bodies of water
  - relative high and low water levels
* are the result of gravitational influences of the moon, sun, and planets
  - the gravitiational attraction of the sun and the moon on the earth
* are the rise and fall of the ocean level as related to the shoreline
  - the sea surface
  - rising and falling of ocean's water
  - slow, periodic vertical rise and fall of the sea surface
  - variable along the Maine coast
  - very important for coastal birding
  - vital to life on Earth
* can also produce strong currents at constricted areas, particularly inlets between islands
  - become extreme when pressure systems and wind combine their effects
  - reverse, oceans can open
* cause different bodies of water to rise and fall.
* causes fluctuations
* change direction and strength throughout the day.
* circulate water in the Sound, while rivers add fresh water and the material it carries.
* come in and tides go out, cleaning the ocean floor.
* create current.
* decrease in intensity as the cube of the distance to the source of gravity.
* develop because of gravitational interactions between the Earth, sun, and moon.
* drive ebb and flood currents which redistribute fine sediments within bays and estuaries.
* flow hard between the mainland and islands
  - in cycles or pulses within their larger movements
* follow the moon more closely than they do the sun.
* go up and down.
* has energy.
* have a regular schedule, they rise and fall twice each day
  - the greatest impact on the evolution of barrier islands
* influence everything from wave height to the feeding patterns of the ocean's inhabitants.
* influences levels
* involves convert kinetic energy
* is an occurrence
  - another factor aiding the spread of phragmites
  - laundry detergent
  - located in beachs
  - measured in feet
  - the vertical movement of water and is measured in feet
  - time periods
  - variation
* keep Europa s deep water liquid.
* leave behind drift seeds along with seaweed, driftwood, tar, trash, and toys.
* move sediment into the leveed areas which is then deposited due to the quiet waters within.
* occur at different times every day
  - because the gravitational force between two bodies decreases with distance
* occur in all bodies of water
  - the mid-ocean as well as along the coastline
* originate from the motions of the earth, moon and sun
  - in the fact that the force of gravity decreases with distance from a massive body
* play a major role in the salinity of the water
  - an important role in the success of fishing the Hudson
* predict tides for areas along the Maine Coast and around the nation.
* produce oscillating currents known as tidal streams.
* pull long tails of gas and stars out of the parent galaxies
  - on the object and stretch it in the direction of the star
* refers to the vertical wave-like movement.
* result from gravitational attraction and centrifugal effect.
* rise and fall as a point on earth is rotated through ocean water bulges
* roll back and forth, and dunes increase and diminish at the whim of sea and air.
* show a daily, monthly, and yearly cycle.
* signal the stages of the moon and the time of day.
* vary from day to day
  - greatly by region and are influenced by sea-floor topography, storms, and water currents
  - on timescales ranging from hours to years due to a number of factors
+ Mediterranean Sea, Oceanography: Seas :: Oceanography
  * Being nearly landlocked affects the Mediterranean Sea's properties. Tides are limited by the narrow connection with the Atlantic Ocean. The water is saltier, partly because of evaporation. The Mediterranean has a deep blue color.