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79-693: Shooters Island is a 43-acre (17 ha) uninhabited island at the southern end of Newark Bay , off the North Shore of Staten Island in New York City . The boundary between the states of New York and New Jersey runs through the island, with a small portion on the north end of the island belonging to the cities of Bayonne and Elizabeth in New Jersey and the rest being part of the borough of Staten Island in New York City. In colonial times Shooters Island

158-515: A promenade . The Howland Hook Marine Terminal is a container port facility located at the northwestern corner of Staten Island at the entrance to the Arthur Kill. Nearby is Port Ivory , named for the Ivory Soap plant once located there. To the east is the residential neighborhood of Mariners Harbor which overlooks the bay. In the first half of the 20th century, Bethlehem Steel maintained

237-677: A day were similar, but at springs the tides rose 7 feet (2.1 m) in the morning but 9 feet (2.7 m) in the evening. Pierre-Simon Laplace formulated a system of partial differential equations relating the ocean's horizontal flow to its surface height, the first major dynamic theory for water tides. The Laplace tidal equations are still in use today. William Thomson, 1st Baron Kelvin , rewrote Laplace's equations in terms of vorticity which allowed for solutions describing tidally driven coastally trapped waves, known as Kelvin waves . Others including Kelvin and Henri Poincaré further developed Laplace's theory. Based on these developments and

316-512: A few days after (or before) new and full moon and are highest around the equinoxes, though Pliny noted many relationships now regarded as fanciful. In his Geography , Strabo described tides in the Persian Gulf having their greatest range when the moon was furthest from the plane of the Equator. All this despite the relatively small amplitude of Mediterranean basin tides. (The strong currents through

395-496: A given day are typically not the same height (the daily inequality); these are the higher high water and the lower high water in tide tables . Similarly, the two low waters each day are the higher low water and the lower low water . The daily inequality is not consistent and is generally small when the Moon is over the Equator . The following reference tide levels can be defined, from

474-462: A hazard to maritime navigation and demolished in the 1980s. Elizabeth is the site of the first English speaking European settlement (1675) in New Jersey , its port at the southern end of the bay a major maritime hub during the colonial era. Jersey Gardens , an outlet mall, has been located north of Elizabethport since 1999. There are plans to construct a mixed used community adjacent to it along

553-459: A plant which built military transports during World War I and World War II. Currently, tugboat companies and number of smaller dry docks operate along the shore. The bay is notoriously polluted, and it is now a Superfund site. "One blue crab in Newark Bay has enough dioxin to give somebody cancer," said David Pringle, spokesman for Clean Water Action . Both the tributaries , particularly

632-400: A popular tool for studying population effects of historical and emerging chemicals of concern due to their chronic exposure to complex mixtures of common contaminants, and subsequent effects due to living within a polluted environment. In January 2008, a 117 ft. Great Lakes Dredge and Dock Company dredge in Newark Bay was struck by a 669-ft Liberian-flagged orange juice freighter named

711-512: A smooth sphere covered by a sufficiently deep ocean under the tidal force of a single deforming body is a prolate spheroid (essentially a three-dimensional oval) with major axis directed toward the deforming body. Maclaurin was the first to write about the Earth's rotational effects on motion. Euler realized that the tidal force's horizontal component (more than the vertical) drives the tide. In 1744 Jean le Rond d'Alembert studied tidal equations for

790-514: A system of pulleys to add together six harmonic time functions. It was "programmed" by resetting gears and chains to adjust phasing and amplitudes. Similar machines were used until the 1960s. The first known sea-level record of an entire spring–neap cycle was made in 1831 on the Navy Dock in the Thames Estuary . Many large ports had automatic tide gauge stations by 1850. John Lubbock was one of

869-675: Is a partially completed linear park greenway intended to link the string of parks along its banks and that of the Hackensack River from the Bayonne Bridge to the Hackensack Meadowlands in Secaucus and North Bergen . In Bayonne, much of the bay has not seen bulkhead development, and hence has a natural shoreline. The city's largest parks are its shores. At Droyer's Point recreational and residential development have included

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948-455: Is a useful concept. Tidal stage is also measured in degrees, with 360° per tidal cycle. Lines of constant tidal phase are called cotidal lines , which are analogous to contour lines of constant altitude on topographical maps , and when plotted form a cotidal map or cotidal chart . High water is reached simultaneously along the cotidal lines extending from the coast out into the ocean, and cotidal lines (and hence tidal phases) advance along

1027-525: Is an industrial area along the bay which becomes residential farther inland near Downtown Newark . The Central Railroad of New Jersey first built the Newark and New York Railroad across the rivers and tip of New Barbadoes Neck in 1869. One bridge was taken out of service in 1946 after a ship collided into it. Passenger service on the other bridge, the PD Draw , was discontinued in 1967. The Kearny Point peninsula

1106-422: Is at once cotidal with high and low waters, which is satisfied by zero tidal motion. (The rare exception occurs when the tide encircles an island, as it does around New Zealand, Iceland and Madagascar .) Tidal motion generally lessens moving away from continental coasts, so that crossing the cotidal lines are contours of constant amplitude (half the distance between high and low water) which decrease to zero at

1185-454: Is called the spring tide . It is not named after the season , but, like that word, derives from the meaning "jump, burst forth, rise", as in a natural spring . Spring tides are sometimes referred to as syzygy tides . When the Moon is at first quarter or third quarter, the Sun and Moon are separated by 90° when viewed from the Earth (in quadrature ), and the solar tidal force partially cancels

1264-587: Is home to the Port Newark-Elizabeth Marine Terminal , the largest container shipping facility in Port of New York and New Jersey , the second busiest in the United States. An estuary , it is periodically dredged to accommodate seafaring ships. Newark Bay is rectangular, approximately 5.5 miles (8.9 km) long, varying in width from 0.6 to 1.2 miles (0.97 to 1.93 km). It is enclosed on

1343-687: Is illegal and fishing is limited due to chemicals that remain in the sediment . Pronounced endocrine disruption and reproductive effects have been reported in Newark Bay Mummichog , often used as a sentinel and bioindicator species. Reproductive effects reported are primarily due to a chemical inhibition of vitellogenesis and oogenesis , which are highly conserved processes for oviparous (egg-laying) animals. Killifish within Newark Bay have also been reported to chemically adapt (desensitize) to aryl hydrocarbon receptor mediated pollutants (i.e. dioxins). Killifish within Newark Bay have emerged as

1422-446: Is never time for the fluid to "catch up" to the state it would eventually reach if the tidal force were constant—the changing tidal force nonetheless causes rhythmic changes in sea surface height. When there are two high tides each day with different heights (and two low tides also of different heights), the pattern is called a mixed semi-diurnal tide . The changing distance separating the Moon and Earth also affects tide heights. When

1501-408: Is not necessarily when the Moon is nearest to zenith or nadir , but the period of the forcing still determines the time between high tides. Because the gravitational field created by the Moon weakens with distance from the Moon, it exerts a slightly stronger than average force on the side of the Earth facing the Moon, and a slightly weaker force on the opposite side. The Moon thus tends to "stretch"

1580-456: Is not the case due to the free fall of the whole Earth, not only the oceans, towards these bodies) a different pattern of tidal forces would be observed, e.g. with a much stronger influence from the Sun than from the Moon: The solar gravitational force on the Earth is on average 179 times stronger than the lunar, but because the Sun is on average 389 times farther from the Earth, its field gradient

1659-522: Is now owned by the City of New York and is maintained by New York City Department of Parks and Recreation as a bird sanctuary. The island and decayed remnants of old piers are visible to users of the Bayonne Bridge between Staten Island and Bayonne, New Jersey . Newark Bay Newark Bay is a tidal bay at the confluence of the Passaic and Hackensack Rivers in northeastern New Jersey . It

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1738-402: Is shorter than average, and stronger tidal currents than average. Neaps result in less extreme tidal conditions. There is about a seven-day interval between springs and neaps. Tidal constituents are the net result of multiple influences impacting tidal changes over certain periods of time. Primary constituents include the Earth's rotation, the position of the Moon and Sun relative to the Earth,

1817-541: Is site of the River Terminal, a massive distribution facility. It comprises the former Western Electric Kearny Works and Federal Shipbuilding and Drydock Company , the shipyards of which operated from 1917 to 1949, and played a prominent role in both World War I and World War II . While there was some maritime development on the eastern banks of the bay closer Bergen Point most of the eastern shore abuts residential and recreational areas. The Hackensack RiverWalk

1896-419: Is the time required for the Earth to rotate once relative to the Moon. Simple tide clocks track this constituent. The lunar day is longer than the Earth day because the Moon orbits in the same direction the Earth spins. This is analogous to the minute hand on a watch crossing the hour hand at 12:00 and then again at about 1: 05 + 1 ⁄ 2 (not at 1:00). The Moon orbits the Earth in the same direction as

1975-677: The Arthur Kill . The names of the channels reflect the period of Dutch colonialization . The area around the bay was called Achter Kol , which translates as behind or beyond the ridge and refers to Bergen Hill . The emergence of the Hudson Palisades begins on Bergen Neck , the peninsula between the bay and the Hudson River . Kill in Dutch means stream or channel. During the British colonial era

2054-590: The Colonial Trust Company for $ 516,000. At the time, the shipyard was valued at two million dollars. The island was used for industrial and shipbuilding operations through 1922. Abandoned vessels began to accumulate around the perimeter of the island by 1930. Shooters Island began to support nesting wading birds , cormorants and gulls in the early 1970s. At its peak in 1995, the island supported 400 nesting pairs of herons , egrets , ibis and 121 nesting pairs of double-crested cormorants . The island

2133-589: The Coriolis effect , is generally clockwise in the southern hemisphere and counterclockwise in the northern hemisphere. The difference of cotidal phase from the phase of a reference tide is the epoch . The reference tide is the hypothetical constituent "equilibrium tide" on a landless Earth measured at 0° longitude, the Greenwich meridian. In the North Atlantic, because the cotidal lines circulate counterclockwise around

2212-692: The Euripus Strait and the Strait of Messina puzzled Aristotle .) Philostratus discussed tides in Book Five of The Life of Apollonius of Tyana . Philostratus mentions the moon, but attributes tides to "spirits". In Europe around 730 AD, the Venerable Bede described how the rising tide on one coast of the British Isles coincided with the fall on the other and described the time progression of high water along

2291-582: The Newark Bay Extension (Interstate 78) of the New Jersey Turnpike . The Upper Bay Bridge is a vertical-lift bridge north of the Casciano that is now used by CSX Transportation for freight shipment, including the notable Juice Train . Central Railroad of New Jersey 's Newark Bay Bridge crossed the bay from 1864 to connect its Communipaw Terminal . Last used in 1978, it was determined to be

2370-518: The North Sea . Much later, in the late 20th century, geologists noticed tidal rhythmites , which document the occurrence of ancient tides in the geological record, notably in the Carboniferous . The tidal force produced by a massive object (Moon, hereafter) on a small particle located on or in an extensive body (Earth, hereafter) is the vector difference between the gravitational force exerted by

2449-585: The Orange Sun . Newark Bay had to be closed for five hours by the U.S. Coast Guard until damages to the GLD&;D dredge were mitigated. The dredge had begun to take on water and a diving crew was sent in order to make repairs. In December 2009, the National Transportation Safety Board issued a report that blamed the Orange Sun for the accident. The Orange Sun ' s master had not informed

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2528-440: The lunar theory of E W Brown describing the motions of the Moon, Arthur Thomas Doodson developed and published in 1921 the first modern development of the tide-generating potential in harmonic form: Doodson distinguished 388 tidal frequencies. Some of his methods remain in use. From ancient times, tidal observation and discussion has increased in sophistication, first marking the daily recurrence, then tides' relationship to

2607-578: The lunitidal interval . To make accurate records, tide gauges at fixed stations measure water level over time. Gauges ignore variations caused by waves with periods shorter than minutes. These data are compared to the reference (or datum) level usually called mean sea level . While tides are usually the largest source of short-term sea-level fluctuations, sea levels are also subject to change from thermal expansion , wind, and barometric pressure changes, resulting in storm surges , especially in shallow seas and near coasts. Tidal phenomena are not limited to

2686-579: The City of Newark started construction of Newark Liberty International Airport on the northwest quadrant of the wetlands which lay between Port Newark and the edge of the developed city. Port Authority took over the operations of Port Newark and the Newark Airport in 1948 and began modernizing and expanding both facilities southward. In 1958, the Port Authority dredged another shipping channel which straightened

2765-426: The Earth rotates on its axis, so it takes slightly more than a day—about 24 hours and 50 minutes—for the Moon to return to the same location in the sky. During this time, it has passed overhead ( culmination ) once and underfoot once (at an hour angle of 00:00 and 12:00 respectively), so in many places the period of strongest tidal forcing is the above-mentioned, about 12 hours and 25 minutes. The moment of highest tide

2844-419: The Earth slightly along the line connecting the two bodies. The solid Earth deforms a bit, but ocean water, being fluid, is free to move much more in response to the tidal force, particularly horizontally (see equilibrium tide ). As the Earth rotates, the magnitude and direction of the tidal force at any particular point on the Earth's surface change constantly; although the ocean never reaches equilibrium—there

2923-570: The Earth's accumulated dynamic tidal response to the applied forces, which response is influenced by ocean depth, the Earth's rotation, and other factors. In 1740, the Académie Royale des Sciences in Paris offered a prize for the best theoretical essay on tides. Daniel Bernoulli , Leonhard Euler , Colin Maclaurin and Antoine Cavalleri shared the prize. Maclaurin used Newton's theory to show that

3002-679: The Library of Congress. The next day a reception was held at the White House for Mr. Downey and representatives of the German Government. The following year the fast three-masted schooner Atlantic was launched at the yard. In 1905, it raced across the Atlantic and won the Kaiser's Cup and set a record for the crossing under sail which stood unbroken for almost 90 years. The brigantine yacht Carnegie

3081-427: The Moon and its phases. Bede starts by noting that the tides rise and fall 4/5 of an hour later each day, just as the Moon rises and sets 4/5 of an hour later. He goes on to emphasise that in two lunar months (59 days) the Moon circles the Earth 57 times and there are 114 tides. Bede then observes that the height of tides varies over the month. Increasing tides are called malinae and decreasing tides ledones and that

3160-459: The Moon is closest, at perigee , the range increases, and when it is at apogee , the range shrinks. Six or eight times a year perigee coincides with either a new or full moon causing perigean spring tides with the largest tidal range . The difference between the height of a tide at perigean spring tide and the spring tide when the moon is at apogee depends on location but can be large as a foot higher. These include solar gravitational effects,

3239-462: The Moon on the particle, and the gravitational force that would be exerted on the particle if it were located at the Earth's center of mass. Whereas the gravitational force subjected by a celestial body on Earth varies inversely as the square of its distance to the Earth, the maximal tidal force varies inversely as, approximately, the cube of this distance. If the tidal force caused by each body were instead equal to its full gravitational force (which

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3318-457: The Moon's altitude (elevation) above the Earth's Equator, and bathymetry . Variations with periods of less than half a day are called harmonic constituents . Conversely, cycles of days, months, or years are referred to as long period constituents. Tidal forces affect the entire earth , but the movement of solid Earth occurs by mere centimeters. In contrast, the atmosphere is much more fluid and compressible so its surface moves by kilometers, in

3397-449: The Moon's tidal force. At these points in the lunar cycle, the tide's range is at its minimum; this is called the neap tide , or neaps . "Neap" is an Anglo-Saxon word meaning "without the power", as in forðganges nip (forth-going without-the-power). Neap tides are sometimes referred to as quadrature tides . Spring tides result in high waters that are higher than average, low waters that are lower than average, " slack water " time that

3476-449: The Moon. Abu Ma'shar discussed the effects of wind and Moon's phases relative to the Sun on the tides. In the 12th century, al-Bitruji (d. circa 1204) contributed the notion that the tides were caused by the general circulation of the heavens. Simon Stevin , in his 1608 De spiegheling der Ebbenvloet ( The theory of ebb and flood ), dismissed a large number of misconceptions that still existed about ebb and flood. Stevin pleaded for

3555-663: The Northumbrian coast. The first tide table in China was recorded in 1056 AD primarily for visitors wishing to see the famous tidal bore in the Qiantang River . The first known British tide table is thought to be that of John Wallingford, who died Abbot of St. Albans in 1213, based on high water occurring 48 minutes later each day, and three hours earlier at the Thames mouth than upriver at London . In 1614 Claude d'Abbeville published

3634-504: The Passaic River, have sections which are lined with heavy industry. Some industrial facilities discharged wastes into the tributaries during the nineteenth and twentieth centuries, prior to passage of the 1972 Clean Water Act . High levels of PCBs and dioxin have been detected in the bay. It also has high levels of mercury , copper and other toxic chemicals. While illegal discharges of chemical waste have been stopped, crabbing

3713-518: The Sun and moon. Pytheas travelled to the British Isles about 325 BC and seems to be the first to have related spring tides to the phase of the moon. In the 2nd century BC, the Hellenistic astronomer Seleucus of Seleucia correctly described the phenomenon of tides in order to support his heliocentric theory. He correctly theorized that tides were caused by the moon , although he believed that

3792-517: The Two Chief World Systems , whose working title was Dialogue on the Tides , gave an explanation of the tides. The resulting theory, however, was incorrect as he attributed the tides to the sloshing of water caused by the Earth's movement around the Sun. He hoped to provide mechanical proof of the Earth's movement. The value of his tidal theory is disputed. Galileo rejected Kepler's explanation of

3871-423: The amphidromic point, the high tide passes New York Harbor approximately an hour ahead of Norfolk Harbor. South of Cape Hatteras the tidal forces are more complex, and cannot be predicted reliably based on the North Atlantic cotidal lines. Investigation into tidal physics was important in the early development of celestial mechanics , with the existence of two daily tides being explained by the Moon's gravity. Later

3950-429: The amphidromic point. For a semi-diurnal tide the amphidromic point can be thought of roughly like the center of a clock face, with the hour hand pointing in the direction of the high water cotidal line, which is directly opposite the low water cotidal line. High water rotates about the amphidromic point once every 12 hours in the direction of rising cotidal lines, and away from ebbing cotidal lines. This rotation, caused by

4029-530: The atmosphere which did not include rotation. In 1770 James Cook 's barque HMS Endeavour grounded on the Great Barrier Reef . Attempts were made to refloat her on the following tide which failed, but the tide after that lifted her clear with ease. Whilst she was being repaired in the mouth of the Endeavour River Cook observed the tides over a period of seven weeks. At neap tides both tides in

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4108-489: The bay and lent its name to the former Bergen Point Lighthouse. Built offshore in 1849 it was demolished and replaced with a skeletal tower in the mid 20th century. The Atlantic Ocean at Sandy Hook and Rockaway Point is approximately 11 miles (18 km) away and reached by tidal straits dredged to maintain shipping lanes . Newark Bay is connected to Upper New York Bay by the Kill Van Kull and to Raritan Bay by

4187-460: The bay was known as Cull bay . Kill van Kull literally translates as channel from the ridge . Arthur Kill is an anglicization of achter kill meaning back channel , which would speak to its location behind Staten Island. Many of the maritime and distribution facilities along the bay are part of Foreign Trade Zone 49 . The bay is spanned by the Vincent R. Casciano Memorial Bridge which carries

4266-401: The bay. The western edge of Newark Bay was originally shallow tidal wetlands covering approximately 12 square miles (31 km ). In the 1910s, the city of Newark began excavating an angled shipping channel in the northeastern quadrant of the wetland which formed the basis of Port Newark. Work on the channel and terminal facilities on its north side accelerated during World War I , when

4345-568: The captain or crew about the ship's tendency to deviate from its course. Newark Bay Bridge [REDACTED] Tide Tides are the rise and fall of sea levels caused by the combined effects of the gravitational forces exerted by the Moon (and to a much lesser extent, the Sun ) and are also caused by the Earth and Moon orbiting one another. Tide tables can be used for any given locale to find

4424-410: The coast. Semi-diurnal and long phase constituents are measured from high water, diurnal from maximum flood tide. This and the discussion that follows is precisely true only for a single tidal constituent. For an ocean in the shape of a circular basin enclosed by a coastline, the cotidal lines point radially inward and must eventually meet at a common point, the amphidromic point . The amphidromic point

4503-616: The course of Bound Brook, the tidal inlet forming the boundary between Newark and Elizabeth. Dredged materials was used to create new upland south of the new Elizabeth Channel, where the Port Authority constructed the Elizabeth Marine Terminal. The first shipping facility to open upon the Elizabeth Channel was the new 90-acre (36 ha) Sea-Land Container Terminal , which was the prototype for virtually every other container terminal constructed thereafter. The Ironbound

4582-475: The daily tides were explained more precisely by the interaction of the Moon's and the Sun's gravity. Seleucus of Seleucia theorized around 150 BC that tides were caused by the Moon. The influence of the Moon on bodies of water was also mentioned in Ptolemy 's Tetrabiblos . In De temporum ratione ( The Reckoning of Time ) of 725 Bede linked semidurnal tides and the phenomenon of varying tidal heights to

4661-473: The east. The Townsend-Downey Company built a yacht, Meteor , for Kaiser Wilhelm II of Germany. Its launch in February 1902 was attended by many hundreds of spectators, including Pres. Theodore Roosevelt and Prince Henry of Prussia . Alice Roosevelt , the president's daughter, christened the boat. Thomas Edison sent a cameraman who made one of the first news movies of the event. It is available online from

4740-587: The federal government took control of Port Newark. During the war there were close to 25,000 troops stationed at the Newark Bay Shipyard. The city decided to expand the port at the end of the war. The Port Authority of New York and New Jersey was formed in 1921 and the Newark Bay Channels were authorized by the Rivers and Harbors Acts in 1922. Shipping operations languished after the war, and in 1927,

4819-531: The first to map co-tidal lines, for Great Britain, Ireland and adjacent coasts, in 1840. William Whewell expanded this work ending with a nearly global chart in 1836. In order to make these maps consistent, he hypothesized the existence of a region with no tidal rise or fall where co-tidal lines meet in the mid-ocean. The existence of such an amphidromic point , as they are now known, was confirmed in 1840 by Captain William Hewett, RN , from careful soundings in

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4898-420: The highest level to the lowest: The semi-diurnal range (the difference in height between high and low waters over about half a day) varies in a two-week cycle. Approximately twice a month, around new moon and full moon when the Sun, Moon, and Earth form a line (a configuration known as a syzygy ), the tidal force due to the Sun reinforces that due to the Moon. The tide's range is then at its maximum; this

4977-415: The idea that the attraction of the Moon was responsible for the tides and spoke in clear terms about ebb, flood, spring tide and neap tide , stressing that further research needed to be made. In 1609 Johannes Kepler also correctly suggested that the gravitation of the Moon caused the tides, which he based upon ancient observations and correlations. Galileo Galilei in his 1632 Dialogue Concerning

5056-464: The interaction was mediated by the pneuma . He noted that tides varied in time and strength in different parts of the world. According to Strabo (1.1.9), Seleucus was the first to link tides to the lunar attraction, and that the height of the tides depends on the moon's position relative to the Sun. The Naturalis Historia of Pliny the Elder collates many tidal observations, e.g., the spring tides are

5135-709: The island was home to a major shipyard, the Townsend-Downey Shipbuilding Company. Theodore E. Ferris , who later designed ships used by the American government in World War I , was an employee of the firm. Around this time it was also home to the Standard Shipbuilding Company, which bought the island in 1915. The entire island was occupied by buildings, including a foundry, pattern shop, and offices. There were major docks and shipways that faced to

5214-412: The month is divided into four parts of seven or eight days with alternating malinae and ledones . In the same passage he also notes the effect of winds to hold back tides. Bede also records that the time of tides varies from place to place. To the north of Bede's location ( Monkwearmouth ) the tides are earlier, to the south later. He explains that the tide "deserts these shores in order to be able all

5293-514: The more to be able to flood other [shores] when it arrives there" noting that "the Moon which signals the rise of tide here, signals its retreat in other regions far from this quarter of the heavens". Later medieval understanding of the tides was primarily based on works of Muslim astronomers , which became available through Latin translation starting from the 12th century. Abu Ma'shar al-Balkhi (d. circa 886), in his Introductorium in astronomiam , taught that ebb and flood tides were caused by

5372-420: The obliquity (tilt) of the Earth's Equator and rotational axis, the inclination of the plane of the lunar orbit and the elliptical shape of the Earth's orbit of the Sun. A compound tide (or overtide) results from the shallow-water interaction of its two parent waves. Because the M 2 tidal constituent dominates in most locations, the stage or phase of a tide, denoted by the time in hours after high water,

5451-426: The oceans, but can occur in other systems whenever a gravitational field that varies in time and space is present. For example, the shape of the solid part of the Earth is affected slightly by Earth tide , though this is not as easily seen as the water tidal movements. Four stages in the tidal cycle are named: Oscillating currents produced by tides are known as tidal streams or tidal currents . The moment that

5530-411: The predicted times and amplitude (or " tidal range "). The predictions are influenced by many factors including the alignment of the Sun and Moon, the phase and amplitude of the tide (pattern of tides in the deep ocean), the amphidromic systems of the oceans, and the shape of the coastline and near-shore bathymetry (see Timing ). They are however only predictions, the actual time and height of

5609-408: The problem from the perspective of a static system (equilibrium theory), that provided an approximation that described the tides that would occur in a non-inertial ocean evenly covering the whole Earth. The tide-generating force (or its corresponding potential ) is still relevant to tidal theory, but as an intermediate quantity (forcing function) rather than as a final result; theory must also consider

5688-445: The sense of the contour level of a particular low pressure in the outer atmosphere. In most locations, the largest constituent is the principal lunar semi-diurnal , also known as the M2 tidal constituent or M 2 tidal constituent . Its period is about 12 hours and 25.2 minutes, exactly half a tidal lunar day , which is the average time separating one lunar zenith from the next, and thus

5767-443: The tidal current ceases is called slack water or slack tide . The tide then reverses direction and is said to be turning. Slack water usually occurs near high water and low water, but there are locations where the moments of slack tide differ significantly from those of high and low water. Tides are commonly semi-diurnal (two high waters and two low waters each day), or diurnal (one tidal cycle per day). The two high waters on

5846-399: The tide is affected by wind and atmospheric pressure . Many shorelines experience semi-diurnal tides—two nearly equal high and low tides each day. Other locations have a diurnal tide—one high and low tide each day. A "mixed tide"—two uneven magnitude tides a day—is a third regular category. Tides vary on timescales ranging from hours to years due to a number of factors, which determine

5925-489: The tides. Isaac Newton (1642–1727) was the first person to explain tides as the product of the gravitational attraction of astronomical masses. His explanation of the tides (and many other phenomena) was published in the Principia (1687) and used his theory of universal gravitation to explain the lunar and solar attractions as the origin of the tide-generating forces. Newton and others before Pierre-Simon Laplace worked

6004-473: The west by the cities of Newark and Elizabeth , and on the east by Jersey City and Bayonne . At the south is Staten Island , New York and at the north Kearny Point and Droyer's Point mark the mouth of the Hackensack. Shooters Island is a bird sanctuary where the borders of Staten Island, Bayonne and Elizabeth meet at one point. The southern tip of Bergen Neck , known as Bergen Point , juts into

6083-475: The work " Histoire de la mission de pères capucins en l'Isle de Maragnan et terres circonvoisines ", where he exposed that the Tupinambá people already had an understanding of the relation between the Moon and the tides before Europe. William Thomson (Lord Kelvin) led the first systematic harmonic analysis of tidal records starting in 1867. The main result was the building of a tide-predicting machine using

6162-627: Was built for the Carnegie Institution of Washington for use in magnetic surveys in the Pacific Ocean. Constructed entirely of wood and nonferrous metals so as not to interfere with magnetic measurements, she was named after industrialist and philanthropist Andrew Carnegie , a friend of Mr. Downey. The island came under the control of the Tidewater Oil Company in 1903. In 1905, the eight building plant and its 33 acres were purchased by

6241-460: Was used as a hunting preserve. During the Revolutionary War , George Washington used the island as a drop-off point for messages, and the place became a haven for spies. Following the war, the island's large oyster beds were heavily harvested, ultimately exhausted from over harvesting . The first shipyard on Shooters Island was established in 1860 by David Decker. From 1898 until 1910,

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