what kind of current is created by wave along coast?
101571
If the waves strike the beach at right angles, then one gets "nearshore currents", or riptides, which are streams of fast moving water straight out into the ocean.\n\nIf the waves strike the beach at some other angle, then one gets "longshore currents".
1120243
The type of wave you are refering to is not a tsunami. These types of waves are more often called "freak waves" or "rogue waves" in oceanographic literature. Tsunamis are only evident in shallow water and even when passing over seamounts are not generally noticeable to a passing ship. \n\nRogue or freak waves are rare, and since we have been positioning oil rigs offshore we have been able to observe and measure more of them that we previously had reports about.  The "New Year Wave" was reported by an oil platform in the North Sea off of Norway and measured at 25.6 meters in height. This was considerably more than the platform designers anticipated. I don't have exact statistics but I have heard anecdotal stories of waves of this height passing oil rigs during Hurricane Katrina last year in the Gulf of Mexico. The problem with measuring these waves during a hurricane is that the oil rigs are normally evacuated in advance and instrumentation often fails to survive the wave.  A number of oil rigs were lost during the hurricane. \n\nHere is a good website discussing current research on rogue waves:\nhttp://www.math.uio.no/~karstent/waves/index_en.html\n\nThe BBC did an interesting documentary on Freak Waves that makes them sound very alarming as a hazard to ships and gives some examples of close calls by passenger liners:\nhttp://www.bbc.co.uk/science/horizon/2002/freakwave.shtml
1005012
Maybe it has something to do with grounding. If a ship is in the ocean and not touch anything then there is no reason for the current to go up right?
797061
yes.  saltwater is salty, meaning it has a lot of ions.  Lots of ions conduct electricity.
587505
There are a number of currents in the ocean in which the water temperature is different from the surrounding area.  The most famous of these is the Gulf Stream that brings warm water from the tropic areas north off the East Coast of the United States and then across the Atlantic to Europe.\n\nNote that this movement is clockwise if you look at it from space.  Of course, this also means that on the other side of the ocean, cold water will move south to complete the circuit.\n\nNow we go to California.  There is a cold current called the California current that brings water from the area off Alaska in the same manner.  This cold water is also full of nutrients which is why there are the kelp forest and abundant wildlife.  It moves in the same manner as the Atlantic Ocean example.\n\nHope this answers your question.
35164
The waves taht you see created on a larger body of water such as a lake or an ocean are largely created as a result of wind acting upon the surface of the water.   There are three components that determine how big the waves become, they are fetch, intensity and duration.\n  Fetch is the available surface area presented to the wind.  A larger body of water will have a larger fetch area, allowing for the wind to develop its effects on the surface.  Thus a larger body of water will typically have larger waves.\n  Intensity is how hard the wind is blowing.  Stronger winds make bigger waves.\n  Duration is how long the wind has been acting on the water's surface.  A quick breeze may cause the surface to ripple, but it takes time and a more prolonged wind to start developing the larger waves that most people are accustomed to seeing on the ocean.\n\nSo, with a river, there are indeed waves, but just not as large as a big lake or the ocean because there just isn't enough fetch to build big waves.  One some large rivers (such as the Mississippi) there are wider areas, sometimes more than a mile wide.  In these sections of a river, it is not uncommon to get waves up to several feet in height on a windy day.
884328
Wind-driven currents, like any type of currents, transport heat energy in the oceans.
376991
wind is the movement of air\njust like waves are the movement of water
65598
I think it would be more kinetic than potential since an ocean wave is always in motion.\n\nHaving said that, here's what research shows:\nWave motion is highest at the surface and diminishes exponentially with depth; however, wave energy is also present as pressure waves in deeper water.\n\nThe potential energy of a set of waves is proportional to wave height squared times wave period (the time between wave crests). Longer period waves have relatively longer wavelengths and move faster. The potential energy is equal to the kinetic energy (that can be expended). Wave power is expressed in kilowatts per meter (at a location such as a shoreline).\n\nThe formula below shows how wave power can be calculated. Excluding waves created by major storms, the largest waves are about 15 meters high and have a period of about 15 seconds. According to the formula, such waves carry about 1700 kilowatts of potential energy across each meter of wavefront. A good wave power location will have an average flux much less than this: perhaps about 50 kw/m.\n\nFormula: Energy (in kw/m) = k H2 T ~ 0.5 H2 T, \nwhere k = constant, H = wave height (crest to trough) in meters, and T = wave period (crest to crest) in seconds.
500590
Tsunamis are unlike wind-generated waves, which many of us may have observed on a local lake or at a coastal beach, in that they are characterized as shallow-water waves, with long periods and wave lengths. The wind-generated swell one sees at a California beach, for example, spawned by a storm out in the Pacific and rhythmically rolling in, one wave after another, might have a period of about 10 seconds and a wave length of 150 m. A tsunami, on the other hand, can have a wavelength in excess of 100 km and period on the order of one hour. \nAs a result of their long wave lengths, tsunamis behave as shallow-water waves. A wave becomes a shallow-water wave when the ratio between the water depth and its wave length gets very small. Shallow-water waves move at a speed that is equal to the square root of the product of the acceleration of gravity (9.8 m/s/s) and the water depth - let's see what this implies: In the Pacific Ocean, where the typical water depth is about 4000 m, a tsunami travels at about 200 m/s, or over 700 km/hr. Because the rate at which a wave loses its energy is inversely related to its wave length, tsunamis not only propagate at high speeds, they can also travel great, transoceanic distances with limited energy losses.
1058011
I think that what you are asking about might be better called coastal deposition.\n\nOver the span of geologic time the sea level has changed dramatically. As the sea level has moved up and down over time the coastal erosion process has created continental shelves that are covered in deposits eroded from dry land around some continents. This process has also helped shape the coastlines of the continents. \n\nOne of the more spectacular examples of coastal deposition are river deltas. The sediment carried by the river is deposited as the flow of river water slows. This tends to sort the sediments according to the energy level of the water that is flowing into the open ocean. First larger grains like gravel and pebbles settle down, and as the river slows, sand, and finally clay size particles settle out of the water. Many river deltas have built up sediment deposits that are several miles thick and cover areas as large as some states. Most of southern Louisiana is a river delta deposit. \n\nAlong many coasts there is a predominant wind direction that helps to build coast long-shore currents. These currents move parallel to the coastline and will cause sediment accumulations (from rivers) such as sand bars and islands to slowly migrate in one direction. Much of the sand on beaches is actually slowly migrating along the shore. As heavier winter waves move the sand offshore, the sand also tends to move along the shore and sometimes temporarily moves back up onto the beach at a new location. \n\nAnother geologic process that is involved in coastal change is both uplift and subsidence. Uplift is taking place on some coasts due to tectonic plate motion. Other coasts are subsiding, or sinking, due to both faulting and slow compaction of underlying sediments. This sort of subsidence is taking place along the Gulf Coast of the US where there are large growth faults that parallel the coast that are sinking towards the Gulf. Sediment deposited thousands and millions of years ago is still settling in some areas and this leads to loss of coastal wetlands and rising local sea level. \n\nIn other areas coastlines are being changed by local erosion of uplifted sediments (e.g. California). Landslides carry hillsides down to the coastline. Another change in many coastlines is being caused by a geologic process called isostacy. As glaciers accumulated across North America during the last ice age, they weighed down that part of the earth's crust and caused it to sink into the asthenosphere. The glaciers melted long ago, but the areas that were covered by glaciers are still rising. This creates a sort of teeter-totter effect, where some coastlines like parts of the East Coast of the US and the Louisiana coast are sinking. \n\nInformation on isostatic rebound:\nhttp://www.homepage.montana.edu/~geol445/hyperglac/isostasy1/\n\nMississippi River Delta:\nhttp://www.lacoast.gov/geography/basins/mr/\n\nExplanation of long shore drift:\nhttp://www.cofc.edu/CGOInquiry/longshoredrift.htm\n\nGood explanation of barrier islands:\nhttp://www3.csc.noaa.gov/beachnourishment/html/geo/barrier.htm\n\nA very good illustration of differential erosion in a coastal setting:\nhttp://www.rgs.edu.sg/events/geotrip/stack.html\n\nUN Coastal Types:\nhttp://www.oceansatlas.com/servlet/CDSServlet?status=ND0yNzYwJmN0bl9pbmZvX3ZpZXdfc2l6ZT1jdG5faW5mb192aWV3X2Z1bGwmNj1lbiYzMz0qJjM3PWtvcw~~
224078
over time the water 'hitting' the coast erodes it by removing the particles (happens over long peiods of time)
552585
Oceanic currents are part of the global system of circulation that distributes the Sun's energy (including warmth) in the planet. Just like the wind currents transport warmer and colder air masses, oceanic currents distribute colder water from the poles to lower latitudes (cold currents are usually deep because cold water sinks under warmer water masses), and warm water from intertropical areas gets transported to higher latitudes (surface currents). \nOceanic currents also differ in their salinity (salt concentration) levels, which is also very important for aquatic organisms as well as for the global circulation, because salinity affects the freezing point of water. Therefore, oceanic currents affect the normal formation of ice, which also affects neighboring land masses and in turn alters the global circulation. \n\nThe influence of oceanic currents is especially important in coastal areas, but the amounts of energy transported by oceanic currents equals the transport by wind currents, and can affect temperature/precipitation balances throughout the world. El Niño (it's complete name is ENSO - El Niño Southern Oscillation) is a good example of the way a change in an oceanic current can alter land climate, e.g. causing droughts.\nAnother example is the Gulf Stream which "warms up" the North Atlantic Ocean and northeaster Europe.\n\nAbout the El Niño-La Niña cycle (ENSO):\nhttp://www.cdc.noaa.gov/ENSO/
47570
The tide comes in and goes out due to gravity, the waves are attributed to wind, techtonic plate activity and weather cycles on the surface of the ocean.  A swell means wave action may be increasing on certain beaches depending on which way the beach faces, i.e. south facing beach.
211399
Wave energy is used for electricity A line of floats are given a certain shape like an aeroplane wing placed in a pivoting position over water, as a wave hits one side it lifts and passes under lowering it this reciprocal action,in turn, turns a generator which in turn creates electrical power.
9692
An earthquake under a body of water often lifts or collapses the land under the water.  This sudden move of a large body of land displaces the water above it, creating a massive wave.  The wave is unlike waves you see at the beach, which are caused by wind.  This wave is very long and can travel at hundreds of miles per hour.  Once the wave reaches shallow water, the wave is compressed, lifting the water very high, causeing a tsunami, or tidal wave.
241018
= wind speed measurement over shore and water surface.\n\nclick link to read more...