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156-985: The Florida Current results from the movement of water pushed from the Atlantic into the Caribbean Sea by the rotation of the Earth (which exerts a greater force at the equator ). The water piles up along Central America and flows northward through the Yucatán Channel into the Gulf of Mexico . The water is heated in the Gulf and forced out through the Florida Straits , between the Florida Keys in Hawk Channel and Cuba and flows northward along

312-492: A World Heritage Site for their geological value, four of them are considered of "Outstanding Universal Value" based on their cultural and natural criteria: Þingvellir , Iceland; Landscape of the Pico Island Vineyard Culture , Portugal; Gough and Inaccessible Islands , United Kingdom; and Brazilian Atlantic Islands: Fernando de Noronha and Atol das Rocas Reserves, Brazil. Continental shelves in

468-506: A Navy Sonic Depth Finder to draw a continuous map across the bed of the Atlantic. This involved little guesswork because the idea of sonar is straightforward with pulses being sent from the vessel, which bounce off the ocean floor, then return to the vessel. The deep ocean floor is thought to be fairly flat with occasional deeps, abyssal plains , trenches , seamounts , basins , plateaus , canyons , and some guyots . Various shelves along

624-721: A branch of the Gulf Stream which flows northward from the Grand Banks ; and the Subpolar Front , an extension of the North Atlantic Current, a wide, vaguely defined region separating the subtropical gyre from the subpolar gyre. This system of currents transports warm water into the North Atlantic, without which temperatures in the North Atlantic and Europe would plunge dramatically. North of

780-516: A coastal slave trade in the 15th century and trade to the Americas began in the 16th century, lasting through the 19th century. The vast majority of those who were transported in the transatlantic slave trade were from Central Africa and West Africa and had been sold by West African slave traders to European slave traders, while others had been captured directly by the slave traders in coastal raids. European slave traders gathered and imprisoned

936-472: A cursed people, Africa and slavery, which laid the ideological groundwork for justifying the transatlantic slave trade. The term "race" was used by the English beginning in the 16th century and referred to family, lineage, and breed. The idea of race continued to develop further through the centuries and was used as a justification for the continuation of the slave trade and racial discrimination. Slavery

1092-503: A developed factor for enslaving people; nonetheless, by the 15th century, Europeans used both race and religion as a justification to enslave sub-Saharan Africans. An increase of enslaved African people from Senegal occurred in the Iberian Peninsula in the 15th century. As the number of Senegalese slaves grew larger Europeans developed new terminologies that associated slavery with skin color. The Spanish city of Seville had

1248-508: A family clan. In contrast, European slaves were chattel, or property, who were stripped of their rights. The cycle of slavery was perpetual; children of slaves would, by default, also be slaves." Millions of enslaved people from some parts of Africa were exported to states in Africa, Europe, and Asia prior to the European colonization of the Americas . The Trans-Saharan slave trade across

1404-527: A form of protection against enslavement. African resistance movements were carried out in every phase of the slave trade to resisting marches to the slave holding stations, resistance at the slave coast, and resistance on slave ships. For example, aboard the slave ship Clare, the enslaved Africans revolted and drove the crew from the vessel and took control of the ship and liberated themselves and landed near Cape Coast Castle in present-day Ghana in 1729. On other slave ships enslaved Africans sunk ships, killed

1560-679: A fort for the slave trade at the Bay of Arguin . In the Middle Ages , religion and not race was a determining factor for who was considered to be a legitimate target of slavery. While Christians did not enslave Christians and Muslims did not enslave Muslims, both allowed the enslavement of people they regarded to be heretics or insufficiently correct in their religion, which allowed Catholic Christians to enslave Orthodox Christians, and Sunni Muslims to enslave Shia Muslims; similarly both Christians and Muslims approved of enslaving Pagans , who came to be

1716-448: A glorious and advantageous trade this is ... It is the hinge on which all the trade of this globe moves." Meanwhile, it became a business for privately owned enterprises , reducing international complications. After 1790, by contrast, captains typically checked out slave prices in at least two of the major markets of Kingston, Havana, and Charleston, South Carolina (where prices by then were similar) before deciding where to sell. For

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1872-583: A justification to Christianize them. In 1452, Pope Nicholas V issued papal bull Dum Diversas which gave the King of Portugal the right to enslave non-Christians to perpetual slavery. The clause included Muslims in West Africa and legitimized the slave trade under the Catholic church. In 1454, Pope Nicholas issued Romanus Pontifex . "Written as a logical sequel to Dum Diversas, Romanus Pontifex allowed

2028-551: A maritime route to "the Indies" (India), where they could trade for luxury goods such as spices without having to obtain these items from Middle Eastern Islamic traders. During the first wave of European colonization , although many of the initial Atlantic naval explorations were led by the Iberian conquistadors , members of many European nationalities were involved, including sailors from Spain , Portugal , France , England ,

2184-500: A more profitable source of labour and encouraging their use. Historian David Eltis argues that Africans were enslaved because of cultural beliefs in Europe that prohibited the enslavement of cultural insiders, even if there was a source of labour that could be enslaved (such as convicts, prisoners of war and vagrants). Eltis argues that traditional beliefs existed in Europe against enslaving Christians (few Europeans not being Christian at

2340-519: A new and larger market for the already existing trade. While those held as slaves in their own region of Africa could hope to escape, those shipped away had little chance of returning to their homeland. The Atlantic slave trading of Africans began in 1441 with two Portuguese explorers, Nuno Tristão and António Gonçalves. Tristão and Gonçalves sailed to Mauritania in West Africa and kidnapped twelve Africans and returned to Portugal and presented

2496-418: A position to call the shots." The earliest known use of the phrase began in the 1830s, and the earliest written evidence was found in an 1836 published book by F. H. Rankin. Portuguese coastal raiders found that slave raiding was too costly and often ineffective and opted for established commercial relations. The colonial South Atlantic and Caribbean economies were particularly dependent on slave labour for

2652-906: A preferred and comparatively profitable target of the slave trade in the Middle Ages: Spain and Portugal were provided with non-Catholic slaves from Eastern Europe via the Balkan slave trade and the Black Sea slave trade . In the 15th century, when the Balkan slave trade was taken over by the Ottoman Empire and the Black Sea slave trade was supplanted by the Crimean slave trade and closed off from Europe, Spain and Portugal replaced this source of slaves by importing slaves first from

2808-465: A proto-racial law. It prevented people with Jewish and Muslim ancestry from settling in the New World. Limpieza de sangre did not guarantee rights for Jews or Muslims who converted to Catholicism . Jews and Muslims who converted to Catholicism were respectively called conversos and moriscos . Some Jews and Muslims converted to Christianity hoping it would grant them rights under Spanish laws. After

2964-689: A velocity of 1.8 metres per second (3.5 kn). The seasonal variation of the Florida Current is relatively understudied. Seasonal variability in transports and eddies has been more intensely studied in the nearby Gulf Stream. Past research indicates The Florida current reaches a maximum transport in July and a minimum transport in October, with a subsequent secondary maximum and minimum occurring in January and April, respectively. Shorter variations in

3120-458: A warm climate, no man will labour for himself who can make another labour for him. This is so true, that of the proprietors of slaves a very small proportion indeed are ever seen to labour." In a 2015 paper, economist Elena Esposito argued that the enslavement of Africans in colonial America was attributable to the fact that the American south was sufficiently warm and humid for malaria to thrive;

3276-416: A weak Intertropical Convergence Zone , South Atlantic tropical cyclones are rare. The Atlantic Ocean is underlain mostly by dense mafic oceanic crust made up of basalt and gabbro and overlain by fine clay, silt and siliceous ooze on the abyssal plain. The continental margins and continental shelf mark lower density, but greater thickness felsic continental rock that is often much older than that of

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3432-621: Is a complex of four water masses, two that form by deep convection in the open ocean – classical and upper Labrador sea water – and two that form from the inflow of dense water across the Greenland-Iceland-Scotland sill – Denmark Strait and Iceland-Scotland overflow water. Along its path across Earth the composition of the NADW is affected by other water masses, especially Antarctic bottom water and Mediterranean overflow water. The NADW

3588-697: Is documented in the Slave Trade Debates of England in the early 19th century: "All the old writers ... concur in stating not only that wars are entered into for the sole purpose of making slaves, but that they are fomented by Europeans, with a view to that object." People living around the Niger River would be transported from these markets to the coast and sold in European trading ports, in exchange for muskets and manufactured goods such as cloth or alcohol. The European demand for slaves provided

3744-414: Is fed by a flow of warm shallow water into the northern North Atlantic which is responsible for the anomalous warm climate in Europe. Changes in the formation of NADW have been linked to global climate changes in the past. Since human-made substances were introduced into the environment, the path of the NADW can be traced throughout its course by measuring tritium and radiocarbon from nuclear weapon tests in

3900-498: Is found off the eastern coast of Canada. Surface water temperatures, which vary with latitude, current systems, and season and reflect the latitudinal distribution of solar energy, range from below −2 °C (28 °F) to over 30 °C (86 °F). Maximum temperatures occur north of the equator, and minimum values are found in the polar regions. In the middle latitudes, the area of maximum temperature variations, values may vary by 7–8 °C (13–14 °F). From October to June

4056-575: Is interrupted by larger transform faults at two places: the Romanche Trench near the Equator and the Gibbs fracture zone at 53°N . The MAR is a barrier for bottom water, but at these two transform faults deep water currents can pass from one side to the other. The MAR rises 2–3 km (1.2–1.9 mi) above the surrounding ocean floor and its rift valley is the divergent boundary between

4212-854: Is intersected by two perpendicular ridges: the Azores–Gibraltar Transform Fault , the boundary between the Nubian and Eurasian plates , intersects the MAR at the Azores triple junction , on either side of the Azores microplate, near the 40°N . A much vaguer, nameless boundary, between the North American and South American plates, intersects the MAR near or just north of the Fifteen-Twenty fracture zone , approximately at 16°N . In

4368-577: Is now Sierra Leone and took 300 people to sell in the Caribbean. In 1564, he repeated the process, this time using Queen Elizabeth's own ship, Jesus of Lübeck , and numerous English voyages ensued. Around 1560, the Portuguese began a regular slave trade to Brazil. From 1580 until 1640, Portugal was temporarily united with Spain in the Iberian Union . Most Portuguese contractors who obtained

4524-729: Is now northern and central Brazil. The formation of the Central American Isthmus closed the Central American Seaway at the end of the Pliocene 2.8 Ma ago. The formation of the isthmus resulted in the migration and extinction of many land-living animals, known as the Great American Interchange , but the closure of the seaway resulted in a "Great American Schism" as it affected ocean currents, salinity, and temperatures in both

4680-794: Is now the Carpathian region, that were similar to the Sargasso Sea. It is possible that the population in the Sargasso Sea migrated to the Atlantic as the Tethys closed at the end of the Miocene around 17 Ma. The origin of the Sargasso fauna and flora remained enigmatic for centuries. The fossils found in the Carpathians in the mid-20th century often called the "quasi-Sargasso assemblage", finally showed that this assemblage originated in

4836-928: The Iliad and the Odyssey , this all-encompassing ocean was instead known as Oceanus , the gigantic river that encircled the world; in contrast to the enclosed seas well known to the Greeks: the Mediterranean and the Black Sea. In contrast, the term "Atlantic" originally referred specifically to the Atlas Mountains in Morocco and the sea off the Strait of Gibraltar and the West African coast. The term " Aethiopian Ocean ", derived from Ancient Ethiopia ,

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4992-741: The Age of Discovery , it was known for separating the New World of the Americas ( North America and South America ) from the Old World of Afro-Eurasia ( Africa , Asia , and Europe ). Through its separation of Afro-Eurasia from the Americas, the Atlantic Ocean has played a central role in the development of human society, globalization, and the histories of many nations. While the Norse were

5148-550: The Americas and enslave Native Americans and Africans. Inter Caetera also settled a dispute between Portugal and Spain over those lands. The declaration included a north–south divide 100 leagues West of the Cape Verde Islands and gave the Spanish Crown exclusive rights to travel and trade west of that line. In Portugal and Spain people had been enslaved because of their religious identity, race had not been

5304-509: The Carpathian Basin from where it migrated over Sicily to the central Atlantic where it evolved into modern species of the Sargasso Sea. The location of the spawning ground for European eels remained unknown for decades . In the early 19th century it was discovered that the southern Sargasso Sea is the spawning ground for both the European and American eel and that the former migrate more than 5,000 km (3,100 mi) and

5460-610: The Columbian exchange while occasionally hosting naval battles. Such naval battles, as well as growing trade from regional American powers like the United States and Brazil , both increased in degree during the early 20th century, and while no major military conflicts have taken place in the Atlantic recently, the ocean remains a core component of trade around the world. The Atlantic Ocean occupies an elongated, S-shaped basin extending longitudinally between Europe and Africa to

5616-530: The Equator . The oldest known mentions of an "Atlantic" sea come from Stesichorus around mid-sixth century BC (Sch. A. R. 1. 211): Atlantikôi pelágei (Ancient Greek: Ἀτλαντικῷ πελάγει , ' the Atlantic sea ' , etym . ' Sea of Atlas ' ) and in The Histories of Herodotus around 450 BC (Hdt. 1.202.4): Atlantis thalassa (Ancient Greek: Ἀτλαντὶς θάλασσα , ' Sea of Atlas ' or '

5772-641: The Fante coalition and fought African and European slave raiders and protected themselves from capture and enslavement. Chief Tomba was born in 1700 and his adopted father was a general from the Jalonke-speaking people who fought against the slave trade. Tomba became ruler of the Baga people in present-day Guinea Bissau in West Africa and made alliances with nearby African villages against African and European slave traders. His efforts were unsuccessful: Tomba

5928-650: The Guinea Coast and left with a few slaves. In 1564, Hawkin's son John Hawkins , sailed to the Guinea Coast and his voyage was supported by Queen Elizabeth I . John later turned to piracy and stole 300 Africans from a Spanish slave ship after failures in Guinea trying to capture Africans as most of his men died after fights with the local Africans. As historian John Thornton remarked, "the actual motivation for European expansion and for navigational breakthroughs

6084-474: The Icelandic Low produces frequent storms. Icebergs are common from early February to the end of July across the shipping lanes near the Grand Banks of Newfoundland . The ice season is longer in the polar regions, but there is little shipping in those areas. Hurricanes are a hazard in the western parts of the North Atlantic during the summer and autumn. Due to a consistently strong wind shear and

6240-629: The Italian states , and the Netherlands . This diversity led Thornton to describe the initial "exploration of the Atlantic" as "a truly international exercise, even if many of the dramatic discoveries were made under the sponsorship of the Iberian monarchs". That leadership later gave rise to the myth that "the Iberians were the sole leaders of the exploration". European overseas expansion led to

6396-415: The Mamluk Sultanate (1258–1517). The Atlantic slave trade was not the only slave trade from Africa; as Elikia M'bokolo wrote in Le Monde diplomatique : The African continent was bled of its human resources via all possible routes. Across the Sahara, through the Red Sea, from the Indian Ocean ports and across the Atlantic. At least ten centuries of slavery for the benefit of the Muslim countries (from

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6552-456: The Netherlands , the United States, and Denmark . Several had established outposts on the African coast, where they purchased slaves from local African leaders. These slaves were managed by a factor , who was established on or near the coast to expedite the shipping of slaves to the New World. Slaves were imprisoned in a factory while awaiting shipment. Current estimates are that about 12 million to 12.8 million Africans were shipped across

6708-428: The North American and Eurasian plates in the North Atlantic and the South American and African plates in the South Atlantic. The MAR produces basaltic volcanoes in Eyjafjallajökull , Iceland, and pillow lava on the ocean floor. The depth of water at the apex of the ridge is less than 2,700 m (1,500 fathoms ; 8,900  ft ) in most places, while the bottom of the ridge is three times as deep. The MAR

6864-405: The North Atlantic Drift is thought to have at least some influence on climate. For example, the Gulf Stream helps moderate winter temperatures along the coastline of southeastern North America, keeping it warmer in winter along the coast than inland areas. The Gulf Stream also keeps extreme temperatures from occurring on the Florida Peninsula. In the higher latitudes, the North Atlantic Drift, warms

7020-451: The North Atlantic oscillation , occurs. On average, the Atlantic is the saltiest major ocean; surface water salinity in the open ocean ranges from 33 to 37 parts per thousand (3.3–3.7%) by mass and varies with latitude and season. Evaporation, precipitation, river inflow and sea ice melting influence surface salinity values. Although the lowest salinity values are just north of the equator (because of heavy tropical rainfall), in general,

7176-399: The Saracens ", claimed that due to the curse imposed upon Black people , they would inevitably remain permanently subjugated by Arabs and other Muslims . He wrote that the fact that so many Africans had been enslaved even by the heretical Muslims was supposed proof of their inferiority. Through these and other writings, European writers established a hitherto unheard of connection between

7332-442: The Scotia Sea , and other tributary water bodies. Including these marginal seas the coast line of the Atlantic measures 111,866 km (69,510 mi) compared to 135,663 km (84,297 mi) for the Pacific. Including its marginal seas, the Atlantic covers an area of 106,460,000 km (41,100,000 sq mi) or 23.5% of the global ocean and has a volume of 310,410,900 km (74,471,500 cu mi) or 23.3% of

7488-428: The asiento between 1580 and 1640 were conversos . For Portuguese merchants, many of whom were " New Christians " or their descendants, the union of crowns presented commercial opportunities in the slave trade to Spanish America. Until the middle of the 17th century, Mexico was the largest single market for slaves in Spanish America. While the Portuguese were directly involved in trading enslaved peoples to Brazil,

7644-435: The caravel , resulted in ships being better equipped to deal with the tidal currents, and could begin traversing the Atlantic Ocean; the Portuguese set up a Navigator's School (although there is much debate about whether it existed and if it did, just what it was). Between 1600 and 1800, approximately 300,000 sailors engaged in the slave trade visited West Africa. In doing so, they came into contact with societies living along

7800-432: The demarcation line between the Spanish and Portuguese empire, but this was against the WIC-charter". The Royal African Company usually refused to deliver slaves to Spanish colonies, though they did sell them to all comers from their factories in Kingston, Jamaica and Bridgetown, Barbados . In 1682, Spain allowed governors from Havana, Porto Bello, Panama , and Cartagena, Colombia to procure slaves from Jamaica. By

7956-521: The meridional overturning circulation (MOC), the northward heat transport of which is threatened by anthropogenic climate change. Large variations in the subpolar gyre on a decade-century scale, associated with the North Atlantic oscillation , are especially pronounced in Labrador Sea Water , the upper layers of the MOC. The South Atlantic is dominated by the anti-cyclonic southern subtropical gyre. The South Atlantic Central Water originates in this gyre, while Antarctic Intermediate Water originates in

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8112-408: The sugar plantations on the Azores , Madeira , Canary, and Cape Verde islands . Europeans participated in African enslavement because of their need for labor, profit, and religious motives. Upon discovering new lands through their naval explorations, European colonisers soon began to migrate to and settle in lands outside their native continent. Off the coast of Africa, European migrants, under

8268-399: The thermocline of the subtropical gyre. The Sargasso Sea in the western North Atlantic can be defined as the area where two species of Sargassum ( S. fluitans and natans ) float, an area 4,000 km (2,500 mi) wide and encircled by the Gulf Stream , North Atlantic Drift , and North Equatorial Current . This population of seaweed probably originated from Tertiary ancestors on

8424-415: The " Old World " ( Afro-Eurasia ) and the " New World " (the Americas). For centuries, tidal currents had made ocean travel particularly difficult and risky for the ships that were then available. Thus, there had been very little, if any, maritime contact between the peoples living in these continents. In the 15th century, however, new European developments in seafaring technologies, such as the invention of

8580-526: The "discovery" of new lands across the Atlantic, Spain did not want Jews and Muslims immigrating to the Americas because the Spanish Crown worried Muslims and non-Christians might introduce Islam and other religions to Native Americans. The law also led to the enslavement of Jews and Muslims, prevented Jews from entering the country and from joining the military, universities and other civil services. Although Jewish conversos and Muslims experienced religious and racial discrimination, some also participated in

8736-418: The 1620s. The Portuguese encroached onto Mbundu lands to expand their mission of trading slaves and establishing a settlement. Nzinga allowed sanctuary to runaway slaves in her nation and organized a military called kilombo against the Portuguese. Nzinga formed alliances with other rival African nations and led an army against the Portuguese slave traders in a thirty-year war. Historians have widely debated

8892-430: The 1690s, the English were shipping the most slaves from West Africa. By the 18th century, Portuguese Angola had become again one of the principal sources of the Atlantic slave trade. After the end of the War of the Spanish Succession , as part of the provisions of the Treaty of Utrecht (1713) , the Asiento was granted to the South Sea Company . Despite the South Sea Bubble , the British maintained this position during

9048-399: The 16th century that led to Africa being underdeveloped in his own time. These ideas were supported by other historians, including Ralph Austen (1987). This idea of an unequal relationship was contested by John Thornton (1998), who argued that "the Atlantic slave trade was not nearly as critical to the African economy as these scholars believed" and that "African manufacturing [at this period]

9204-415: The 1800s. Although there were African nations that participated and profited from the Atlantic slave trade, many African nations resisted such as the Djola and Balanta . Some African nations organized into military resistance movements and fought African slave raiders and European slave traders entering their villages. For example, the Akan , Etsi, Fetu, Eguafo, Agona , and Asebu people organized into

9360-405: The 1820s. The first side of the triangle was the export of goods from Europe to Africa. A number of African kings and merchants took part in the trading of enslaved people from 1440 to about 1833. For each captive, the African rulers would receive a variety of goods from Europe. These included guns, ammunition, alcohol, indigo dyed Indian textiles, and other factory-made goods. The second leg of

9516-400: The 1870s, the Challenger expedition discovered parts of what is now known as the Mid-Atlantic Ridge, or: An elevated ridge rising to an average height of about 1,900 fathoms [3,500 m; 11,400 ft] below the surface traverses the basins of the North and South Atlantic in a meridianal direction from Cape Farewell, probably its far south at least as Gough Island, following roughly

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9672-415: The 18th century, becoming the biggest shippers of slaves across the Atlantic. It is estimated that more than half of the entire slave trade took place during the 18th century, with the Portuguese, British, and French being the main carriers of nine out of ten slaves abducted in Africa. At the time, slave trading was regarded as crucial to Europe's maritime economy, as noted by one English slave trader: "What

9828-434: The 1953 definition it extends south to Antarctica, while in later maps it is bounded at the 60° parallel by the Southern Ocean. The Atlantic has irregular coasts indented by numerous bays, gulfs and seas. These include the Baltic Sea , Black Sea , Caribbean Sea , Davis Strait , Denmark Strait , part of the Drake Passage , Gulf of Mexico , Labrador Sea , Mediterranean Sea , North Sea , Norwegian Sea , almost all of

9984-411: The 1960s and CFCs . The clockwise warm-water North Atlantic Gyre occupies the northern Atlantic, and the counter-clockwise warm-water South Atlantic Gyre appears in the southern Atlantic. In the North Atlantic, surface circulation is dominated by three inter-connected currents: the Gulf Stream which flows north-east from the North American coast at Cape Hatteras ; the North Atlantic Current ,

10140-450: The African rulers to trade as slaves for European consumer goods. Also, Europeans shifted the location of disembarkation points for trade along the African coast to follow military conflicts in West-Central Africa. In areas of Africa where slavery was not prevalent, European slave traders worked and negotiated with African rulers on their terms for trade, and African rulers refused to supply European demands. Africans and Europeans profited from

10296-426: The Atlantic and Pacific. Marine organisms on both sides of the isthmus became isolated and either diverged or went extinct. Atlantic slave trade The Atlantic slave trade or transatlantic slave trade involved the transportation by slave traders of enslaved African people to the Americas . European slave ships regularly used the triangular trade route and its Middle Passage . Europeans established

10452-407: The Atlantic are wide off Newfoundland, southernmost South America, and northeastern Europe. In the western Atlantic carbonate platforms dominate large areas, for example, the Blake Plateau and Bermuda Rise . The Atlantic is surrounded by passive margins except at a few locations where active margins form deep trenches : the Puerto Rico Trench (8,376 m or 27,480 ft maximum depth) in

10608-468: The Atlantic include the Challenger expedition and the German Meteor expedition ; as of 2001 , Columbia University 's Lamont–Doherty Earth Observatory and the United States Navy Hydrographic Office conduct research on the ocean. The MAR divides the Atlantic longitudinally into two halves, in each of which a series of basins are delimited by secondary, transverse ridges. The MAR reaches above 2,000 m (6,600 ft) along most of its length, but

10764-403: The Atlantic north of the equator. The coldest zones are in high latitudes, with the coldest regions corresponding to the areas covered by sea ice. Ocean currents influence the climate by transporting warm and cold waters to other regions. The winds that are cooled or warmed when blowing over these currents influence adjacent land areas. The Gulf Stream and its northern extension towards Europe,

10920-432: The Atlantic over a span of 400 years. The number purchased by the traders was considerably higher, as the passage had a high death rate, with between 1.2 and 2.4 million dying during the voyage, and millions more in seasoning camps in the Caribbean after arrival in the New World. Millions of people also died as a result of slave raids, wars, and during transport to the coast for sale to European slave traders. Near

11076-455: The Atlantic sea ' ) where the name refers to "the sea beyond the pillars of Heracles " which is said to be part of the sea that surrounds all land. In these uses, the name refers to Atlas , the Titan in Greek mythology , who supported the heavens and who later appeared as a frontispiece in medieval maps and also lent his name to modern atlases . On the other hand, to early Greek sailors and in ancient Greek mythological literature such as

11232-462: The Atlantic slave trade through Futa Toro , present-day Senegal . Abdul Kader Khan and Futa Toro nation resisted French slave traders and colonizers who wanted to enslave Africans and Muslims from Futa Toro. Other forms of resistance against the Atlantic slave trade by African nations was migrating to different areas in West Africa such as swamps and lake regions to escape slave raids. In West Africa, Efik slave dealers participated in slave dealing as

11388-511: The Atlantic. From 1525, slaves were transported directly from the Portuguese colony of Sao Tomé across the Atlantic to Hispaniola . A burial ground in Campeche , Mexico, suggests enslaved Africans had been brought there not long after Hernán Cortés completed the subjugation of Aztec and Mayan Mexico in 1519. The graveyard had been in use from approximately 1550 to the late 17th century. In 1562, John Hawkins captured Africans in what

11544-583: The Bahamas, while coarse river outwash sands and silt are common in shallow shelf areas like the Georges Bank . Coarse sand, boulders, and rocks were transported into some areas, such as off the coast of Nova Scotia or the Gulf of Maine during the Pleistocene ice ages. The break-up of Pangaea began in the central Atlantic, between North America and Northwest Africa, where rift basins opened during

11700-625: The Caribbean islands Curaçao , Jamaica and Martinique , as European nations built up economically slave-dependent colonies in the New World. In 1672, the Royal Africa Company was founded. In 1674, the New West India Company became deeper involved in slave trade. From 1677, the Compagnie du Sénégal , used Gorée to house the slaves . The Spanish proposed to get the slaves from Cape Verde , located closer to

11856-655: The Dutch who invested in the British West Indies and Dutch Brazil producing sugar. After the Iberian Union fell apart, Spain prohibited Portugal from directly engaging in the slave trade as a carrier. According the Treaty of Münster the slave trade was opened for the traditional enemies of Spain, losing a large share of the trade to the Dutch, French, and English. For 150 years, Spanish transatlantic traffic

12012-543: The European Catholic nations to expand their dominion over 'discovered' land. Possession of non-Christian lands would be justified along with the enslavement of native, non-Christian 'pagans' in Africa and the 'New World.'" Dum Diversas and Romanus Pontifex may have had an influence with the creation of doctrines supportive of empire building. In 1493, the Doctrine of Discovery issued by Pope Alexander VI ,

12168-482: The European mainland. A vast amount of labour was needed to create and sustain plantations that required intensive labour to grow, harvest, and process prized tropical crops. Western Africa (part of which became known as "the Slave Coast "), Angola and nearby Kingdoms and later Central Africa , became the source for enslaved people to meet the demand for labour. The basic reason for the constant shortage of labour

12324-460: The European shores of the former Tethys Ocean and has, if so, maintained itself by vegetative growth , floating in the ocean for millions of years. Other species endemic to the Sargasso Sea include the sargassum fish , a predator with algae-like appendages which hovers motionless among the Sargassum . Fossils of similar fishes have been found in fossil bays of the former Tethys Ocean, in what

12480-724: The Indian Ocean to the Gulf of Aden . Others were carried across the Red Sea to Arabia and Aden , with sick slaves being thrown overboard, or they were marched across the Sahara desert via the Trans-Saharan slave trade route to the Nile , many of them dying from exposure or swollen feet along the way. However, estimates are imprecise, which can affect comparison between different slave trades. Two rough estimates by scholars of

12636-542: The Kongolese King Afonso I seized a French vessel and its crew for illegally trading on his coast. In addition, Afonso complained to the king of Portugal that Portuguese slave traders continued to kidnap his people, which was causing depopulation in his kingdom. Queen Nzinga (Nzinga Mbande) fought against the expansion of the Portuguese slave trade into Mbundu people's lands in Central Africa in

12792-623: The Late Triassic and Early Jurassic. This period also saw the first stages of the uplift of the Atlas Mountains. The exact timing is controversial with estimates ranging from 200 to 170 Ma. The opening of the Atlantic Ocean coincided with the initial break-up of the supercontinent Pangaea , both of which were initiated by the eruption of the Central Atlantic Magmatic Province (CAMP), one of

12948-929: The New World Europeans received tobacco, potatoes, tomatoes, and maize. Other items and commodities becoming important in global trade were the tobacco, sugarcane, and cotton crops of the Americas, along with the gold and silver brought from the American continent not only to Europe but elsewhere in the Old World. By the 15th century, slavery had existed in the Iberian Peninsula (Portugal and Spain) of Western Europe throughout recorded history. The Roman Empire had established its system of slavery in ancient times. Historian Benjamin Isaac suggests proto-racism existed in ancient times among Greco-Roman people . Racial prejudices were based on dehumanizing

13104-613: The North Atlantic Gyre, the cyclonic North Atlantic Subpolar Gyre plays a key role in climate variability. It is governed by ocean currents from marginal seas and regional topography, rather than being steered by wind, both in the deep ocean and at sea level. The subpolar gyre forms an important part of the global thermohaline circulation . Its eastern portion includes eddying branches of the North Atlantic Current which transport warm, saline waters from

13260-594: The Portuguese to "tap into" the "well-developed commercial economy in Africa ... without engaging in hostilities". "Peaceful trade became the rule all along the African coast", although there were some rare exceptions when acts of aggression led to violence. For instance, Portuguese traders attempted to conquer the Bissagos Islands in 1535. In 1571, Portugal, supported by the Kingdom of Kongo , took control of

13416-867: The Sahara had functioned since antiquity, and continued to do so up until the 20th-century; in 652, the Rashidun Caliphate in Egypt enforced an annual tribute of 400 slaves from the Christian Kingdom of Makuria by the Baqt treaty, which was to be in effect for centuries. It supplied Africans for slavery in the Rashidun Caliphate (632–661), the Umayyad Caliphate (661–750), the Abbasid Caliphate (750–1258) and

13572-556: The South Atlantic, and the "Atmospheric Bridge", which evaporates subtropical Atlantic waters and exports it to the Pacific. The Atlantic Ocean consists of four major, upper water masses with distinct temperature and salinity. The Atlantic subarctic upper water in the northernmost North Atlantic is the source for subarctic intermediate water and North Atlantic intermediate water. North Atlantic central water can be divided into

13728-637: The Spanish Empire relied on the Asiento de Negros system, awarding (Catholic) Genoese merchant bankers the license to trade enslaved people from Africa to their colonies in Spanish America . Cartagena , Veracruz , Buenos Aires , and Hispaniola received the majority of slave arrivals, mainly from Angola . This division of the slave trade between Spain and Portugal upset the British and

13884-470: The Spanish king gave permission for ships to go directly from Africa to the Caribbean colonies, and they started taking 200–300 per trip. During the first Atlantic system, most of these slavers were Portuguese, giving them a near-monopoly. Decisive was the 1494 Treaty of Tordesillas which did not allow Spanish ships in African ports. Spain had to rely on Portuguese ships and sailors to bring slaves across

14040-475: The atmosphere over the oceans, keeping the British Isles and northwestern Europe mild and cloudy, and not severely cold in winter, like other locations at the same high latitude. The cold water currents contribute to heavy fog off the coast of eastern Canada (the Grand Banks of Newfoundland area) and Africa's northwestern coast. In general, winds transport moisture and air over land areas. Every winter,

14196-431: The beginning of the 19th century, various governments acted to ban the trade, although illegal smuggling still occurred. It was generally thought that the transatlantic slave trade ended in 1867, but evidence was later found of voyages until 1873. In the early 21st century, several governments issued apologies for the transatlantic slave trade. The Atlantic slave trade developed after trade contacts were established between

14352-470: The captain and the rest of the crew. The captain and crew made a deal with the Africans and promised them their freedom. The Africans took control of the ship and sailed back to Africa's shore. The captain and his crew tried to re-enslave the Africans but were unsuccessful. The Atlantic slave trade is customarily divided into two eras, known as the first and second Atlantic systems. Slightly more than 3% of

14508-581: The captive Africans as gifts to Prince Henry the Navigator . By 1460, seven hundred to eight hundred African people were taken annually and imported into Portugal. In Portugal, the Africans taken were used as domestic servants. From 1460 to 1500, the removal of Africans increased as Portugal and Spain built forts along the coast of West Africa. By 1500, Portugal and Spain had taken about 50,000 thousand West Africans. The Africans worked as domestic servants, artisans, and farmers. Other Africans were taken to work

14664-580: The conquered Canary Islands and then from mainland Africa, initially from Arab slave traders via the Trans-Saharan slave trade from Libya , and then directly from the African West coast through Portuguese outposts, which developed into the Atlantic slave trade and expanded significantly after the establishment of the colonies in the Americas in 1492. In the 15th century, Spain enacted a racially discriminatory law named limpieza de sangre , which translates as "blood purity" or "cleanliness of blood",

14820-578: The contact between the Old and New Worlds producing the Columbian exchange , named after the Italian explorer Christopher Columbus . It started the global silver trade from the 16th to 18th centuries and led to direct European involvement in the Chinese porcelain trade . It involved the transfer of goods unique to one hemisphere to another. Europeans brought cattle, horses, and sheep to the New World, and from

14976-515: The crew, and set fire to ships with explosives. Slave traders and white crewmembers prepared and prevented possible rebellions by loading women, men, and children separately inside slave ships because enslaved children used loose pieces of wood, tools, and any objects they found and passed them to the men to free themselves and fight the crew. According to historical research from the records of slave ship captains, between 1698 and 1807, there were 353 acts of insurrection aboard slave ships. The majority of

15132-503: The current increases along its course. At 27°N, it has a width of 80 km (50 mi); it gradually increases from 120 km (75 mi) at 29°N to 145 km (90 mi) where it flows into the Gulf Stream at 73°W. Atlantic The Atlantic Ocean is the second-largest of the world's five oceanic divisions , with an area of about 85,133,000 km (32,870,000 sq mi). It covers approximately 17% of Earth's surface and about 24% of its water surface area. During

15288-757: The directions of the Kingdom of Castile , invaded and colonised the Canary Islands during the 15th century, where they converted much of the land to the production of wine and sugar. Along with this, they also captured native Canary Islanders, the Guanches , to use as slaves both on the Islands and across the Christian Mediterranean. After the success of Portugal and Spain in the slave trade other European nations followed. In 1530, an English merchant from Plymouth, William Hawkins , visited

15444-411: The disease had debilitating effects on the European settlers. Conversely, many enslaved Africans were taken from regions of Africa which hosted particularly potent strains of the disease, so the Africans had already developed natural resistance to malaria. This, Esposito argued, resulted in higher malaria survival rates in the American south among enslaved Africans than among European labourers, making them

15600-578: The east coast of the United States . The Florida Current is often referred to imprecisely as the Gulf Stream . In fact, the Florida Current joins the Gulf Stream off the east coast of Florida . The Florida Current has an estimated mean transport of 30 Sv , varying seasonally and interannually by as much as 10 Sv. The volume transport increases as it flows farther north, reaching its maximum transport of 85 Sv near Cape Hatteras. The water reaches

15756-670: The east, and the Americas to the west. As one component of the interconnected World Ocean , it is connected in the north to the Arctic Ocean , to the Pacific Ocean in the southwest, the Indian Ocean in the southeast, and the Southern Ocean in the south. Other definitions describe the Atlantic as extending southward to Antarctica . The Atlantic Ocean is divided in two parts, the northern and southern Atlantic, by

15912-498: The east, the boundaries of the ocean proper are Europe: the Strait of Gibraltar (where it connects with the Mediterranean Sea  – one of its marginal seas  – and, in turn, the Black Sea , both of which also touch upon Asia) and Africa. In the southeast, the Atlantic merges into the Indian Ocean. The 20° East meridian , running south from Cape Agulhas to Antarctica defines its border. In

16068-544: The eastern and western North Atlantic central water since the western part is strongly affected by the Gulf Stream and therefore the upper layer is closer to underlying fresher subpolar intermediate water. The eastern water is saltier because of its proximity to Mediterranean water. North Atlantic central water flows into South Atlantic central water at 15°N . There are five intermediate waters: four low-salinity waters formed at subpolar latitudes and one high-salinity formed through evaporation. Arctic intermediate water flows from

16224-552: The engines behind the trade in the capital firms, the shipping and insurance companies of Europe and America, or the plantation systems in Americas. They did not wield any influence on the building manufacturing centres of the West. Sometimes trading between Europeans and African leaders was not equal. For example, Europeans influenced Africans to provide more slaves by forming military alliances with warring African societies to instigate more fighting which would provide more war captives to

16380-546: The enslaved at forts on the African coast and then brought them to the Americas. Some Portuguese and Europeans participated in slave raids. As the National Museums Liverpool explains: "European traders captured some Africans in raids along the coast, but bought most of them from local African or African-European dealers." Many European slave traders generally did not participate in slave raids because life expectancy for Europeans in sub-Saharan Africa

16536-550: The enslaved people exported from Africa were traded between 1525 and 1600, and 16% in the 17th century. The first Atlantic system was the trade of enslaved Africans to, primarily, American colonies of the Portuguese and Spanish empires. Before the 1520s, slavers took Africans to Seville or the Canary Islands and then exported some of them from Spain to its colonies in Hispaniola and Puerto Rico, with 1 to 40 slaves per ship. These supplemented enslaved Native Americans. In 1518,

16692-470: The entire European continent, rendering it unthinkable to enslave a European since this would require enslaving an insider. Conversely, Africans were viewed as outsiders and thus qualified for enslavement. While Europeans may have treated some types of labour, such as convict labour, with conditions similar to that of slaves, these labourers would not be regarded as chattel and their progeny could not inherit their subordinate status, thus not making them slaves in

16848-493: The first known humans to cross the Atlantic, it was the expedition of Christopher Columbus in 1492 that proved to be the most consequential. Columbus' expedition ushered in an age of exploration and colonization of the Americas by European powers , most notably Portugal , Spain , France , and the United Kingdom . From the 16th to 19th centuries, the Atlantic Ocean was the center of both an eponymous slave trade and

17004-520: The foreign peoples they conquered through warfare. Since the fall of the Western Roman Empire , various systems of slavery continued in the successor Islamic and Christian kingdoms of the peninsula through the early modern era of the Atlantic slave trade. In 1441–1444, Portuguese traders first captured Africans on the Atlantic coast of Africa (in what is today Mauritania ), taking their captives to slavery in Europe , and established

17160-479: The increase of the energy added into the system. Inversely, less wind speed and colder temperatures slow down currents and transport is typically lower. However, the Florida Current is formed in the Gulf of Mexico by the Yucatán Current and Gulf of Mexico Loop Current and is important to monitor to determine flux in seasonal variations at the formation of the current. Like transport, the spatial magnitude of

17316-419: The largest African population . "The Treaty of Alcacuvas in 1479 provided traders the right to supply Spaniards with Africans." In addition, in the 15th century, Dominican friar Annius of Viterbo invoked the curse of Ham , from the biblical story of enslavement, to explain the differences between Europeans and Africans in his writings. Annius, who frequently wrote of the "superiority of Christians over

17472-491: The last sixteen years of the transatlantic slave trade, Spain was the only transatlantic slave-trading empire. Following the British Slave Trade Act 1807 and U.S. bans on the African slave trade that same year, it declined, but the period thereafter still accounted for 28.5% of the total volume of the Atlantic slave trade. Between 1810 and 1860, over 3.5 million slaves were transported, with 850,000 in

17628-517: The latter 2,000 km (1,200 mi). Ocean currents such as the Gulf Stream transport eel larvae from the Sargasso Sea to foraging areas in North America, Europe, and northern Africa. Recent but disputed research suggests that eels possibly use Earth's magnetic field to navigate through the ocean both as larvae and as adults. The climate is influenced by the temperatures of the surface waters and water currents as well as winds. Because of

17784-666: The limits of the oceans and seas in 1953, but some of these definitions have been revised since then and some are not recognized by various authorities, institutions, and countries, for example the CIA World Factbook . Correspondingly, the extent and number of oceans and seas vary. The Atlantic Ocean is bounded on the west by North and South America. It connects to the Arctic Ocean through the Denmark Strait , Greenland Sea , Norwegian Sea and Barents Sea . To

17940-501: The lowest values are in the high latitudes and along coasts where large rivers enter. Maximum salinity values occur at about 25° north and south , in subtropical regions with low rainfall and high evaporation. The high surface salinity in the Atlantic, on which the Atlantic thermohaline circulation is dependent, is maintained by two processes: the Agulhas Leakage/Rings , which brings salty Indian Ocean waters into

18096-514: The margins of the continents constitute about 11% of the bottom topography with few deep channels cut across the continental rise. The mean depth between 60°N and 60°S is 3,730 m (12,240 ft), or close to the average for the global ocean, with a modal depth between 4,000 and 5,000 m (13,000 and 16,000 ft). In the South Atlantic the Walvis Ridge and Rio Grande Rise form barriers to ocean currents. The Laurentian Abyss

18252-664: The maximum depth, the Milwaukee Deep in the Puerto Rico Trench , is 8,376 m (27,480 ft). Top large seas: The bathymetry of the Atlantic is dominated by a submarine mountain range called the Mid-Atlantic Ridge (MAR). It runs from 87°N or 300 km (190 mi) south of the North Pole to the subantarctic Bouvet Island at 54°S . Expeditions to explore the bathymertry of

18408-529: The mid-16th century, the Spanish New Laws , prohibited slavery of the Indigenous people. A labour shortage resulted. Alternative sources of labour, such as indentured servitude , failed to provide a sufficient workforce. Many crops could not be sold for profit, or even grown, in Europe. Exporting crops and goods from the New World to Europe often proved to be more profitable than producing them on

18564-492: The middle of the 17th century, slavery had hardened as a racial caste, with African slaves and their future offspring being legally the property of their owners, as children born to slave mothers were also slaves ( partus sequitur ventrem ). As property, the people were considered merchandise or units of labour, and were sold at markets with other goods and services. The major Atlantic slave trading nations, in order of trade volume, were Portugal , Britain , Spain , France ,

18720-620: The most extensive and voluminous large igneous provinces in Earth's history associated with the Triassic–Jurassic extinction event , one of Earth's major extinction events . Theoliitic dikes , sills , and lava flows from the CAMP eruption at 200 Ma have been found in West Africa, eastern North America, and northern South America. The extent of the volcanism has been estimated to 4.5 × 10  km (1.7 × 10  sq mi) of which 2.5 × 10  km (9.7 × 10  sq mi) covered what

18876-658: The most likely people to explore the Atlantic and develop its commerce". He identified these as being the drive to find new and profitable commercial opportunities outside Europe. Additionally, there was the desire to create an alternative trade network to that controlled by the Muslim Ottoman Empire of the Middle East, which was viewed as a commercial, political and religious threat to European Christendom. In particular, European traders wanted to trade for gold, which could be found in western Africa, and to find

19032-430: The nature of the relationship between these African kingdoms and the European traders. The Guyanese historian Walter Rodney (1972) has argued that it was an unequal relationship, with Africans being forced into a "colonial" trade with the more economically developed Europeans, exchanging raw materials and human resources (i.e. slaves) for manufactured goods. He argued that it was this economic trade agreement dating back to

19188-493: The ninth to the nineteenth) ... Four million enslaved people exported via the Red Sea , another four million through the Swahili ports of the Indian Ocean , perhaps as many as nine million along the trans-Saharan caravan route, and eleven to twenty million (depending on the author) across the Atlantic Ocean. Slaves were marched in shackles to the coasts of Sudan, Ethiopia and Somali, placed upon dhows and trafficked across

19344-571: The north to become the source for North Atlantic deep water, south of the Greenland-Scotland sill. These two intermediate waters have different salinity in the western and eastern basins. The wide range of salinities in the North Atlantic is caused by the asymmetry of the northern subtropical gyre and a large number of contributions from a wide range of sources: Labrador Sea, Norwegian-Greenland Sea, Mediterranean, and South Atlantic Intermediate Water. The North Atlantic deep water (NADW)

19500-567: The numbers African slaves held over twelve centuries in the Muslim world are 11.5 million and 14 million, while other estimates indicate a number between 12 and 15 million African slaves prior to the 20th century. According to John K. Thornton , Europeans usually bought enslaved people who had been captured in endemic warfare between African states. Some Africans had made a business out of capturing war captives or members of neighboring ethnic groups and selling them. A reminder of this practice

19656-425: The ocean's great capacity to store and release heat, maritime climates are more moderate and have less extreme seasonal variations than inland climates. Precipitation can be approximated from coastal weather data and air temperature from water temperatures. The oceans are the major source of atmospheric moisture that is obtained through evaporation. Climatic zones vary with latitude; the warmest zones stretch across

19812-578: The outlines of the coasts of the Old and the New Worlds. The remainder of the ridge was discovered in the 1920s by the German Meteor expedition using echo-sounding equipment. The exploration of the MAR in the 1950s led to the general acceptance of seafloor spreading and plate tectonics . Most of the MAR runs under water but where it reaches the surfaces it has produced volcanic islands. While nine of these have collectively been nominated

19968-651: The pond" or "on the other side of the pond" or "across the pond", rather than to discuss the ocean itself. The term dates to 1640, first appearing in print in a pamphlet released during the reign of Charles I , and reproduced in 1869 in Nehemiah Wallington 's Historical Notices of Events Occurring Chiefly in The Reign of Charles I , where "great Pond" is used in reference to the Atlantic Ocean by Francis Windebank , Charles I's Secretary of State . The International Hydrographic Organization (IHO) defined

20124-403: The production of sugarcane and other commodities. This was viewed as crucial by those Western European states which were vying with one another to create overseas empires . The Portuguese, in the 16th century, were the first to transport slaves across the Atlantic. In 1526, they completed the first transatlantic slave voyage to Brazil , and other Europeans soon followed. Shipowners regarded

20280-437: The rebellions by the Africans were defeated. Igbo slaves on ships committed suicide by jumping overboard as an act of resistance to enslavement. To prevent further suicides, white crewmen placed nets around slave ships to catch enslaved persons that jumped overboard. White captains and crewmen invested in firearms, swivel guns , and ordered ship crews to watch slaves to prevent or prepare for possible slave revolts. John Newton

20436-438: The seafloor. The oldest oceanic crust in the Atlantic is up to 145 million years and is situated off the west coast of Africa and the east coast of North America, or on either side of the South Atlantic. In many places, the continental shelf and continental slope are covered in thick sedimentary layers. For instance, on the North American side of the ocean, large carbonate deposits formed in warm shallow waters such as Florida and

20592-566: The slave trade of Africans. In Lisbon during the 16th and 17th centuries, Muslims financed by Jewish conversos traded Africans across the Sahara Desert and enslaved Africans before and during the Atlantic slave trade in Europe and Africa. In New Spain , Spaniards applied limpieza de sangre to Africans and Native Americans and created a racial caste system, believing them to be impure because they were not Christian. Europeans enslaved Muslims and people practicing other religions as

20748-487: The slave trade; however, African populations, the social, political, and military changes to African societies suffered greatly. For example, Mossi Kingdoms resisted the Atlantic slave trade and refused to participate in the selling of African people. However, as time progressed more European slave traders entered into West Africa and were having more influence in African nations and the Mossi became involved in slave trading in

20904-572: The slaves as cargo to be transported to the Americas as quickly and cheaply as possible, there to be sold to work on coffee, tobacco, cocoa, sugar, and cotton plantations , gold and silver mines, rice fields, the construction industry, cutting timber for ships, as skilled labour, and as domestic servants. The first enslaved Africans sent to the English colonies were classified as indentured servants , with legal standing similar to that of contract-based workers coming from Britain and Ireland. However, by

21060-499: The south-western region of Angola in order to secure its threatened economic interest in the area. Although Kongo later joined a coalition in 1591 to force the Portuguese out, Portugal had secured a foothold on the continent that it continued to occupy until the 20th century. Despite these incidents of occasional violence between African and European forces, many African states ensured that any trade went on in their own terms, for instance, imposing custom duties on foreign ships. In 1525,

21216-551: The subtropics to the northeastern Atlantic. There this water is cooled during winter and forms return currents that merge along the eastern continental slope of Greenland where they form an intense (40–50  Sv ) current which flows around the continental margins of the Labrador Sea . A third of this water becomes part of the deep portion of the North Atlantic Deep Water (NADW). The NADW, in turn, feeds

21372-421: The surface is usually covered with sea ice in the Labrador Sea , Denmark Strait , and Baltic Sea. The Coriolis effect circulates North Atlantic water in a clockwise direction, whereas South Atlantic water circulates counter-clockwise. The south tides in the Atlantic Ocean are semi-diurnal; that is, two high tides occur every 24 lunar hours. In latitudes above 40° North some east–west oscillation, known as

21528-422: The time) and those slaves that existed in Europe tended to be non-Christians and their immediate descendants (since a slave converting to Christianity did not guarantee emancipation) and thus by the 15th century Europeans as a whole came to be regarded as insiders. Eltis argues that while all slave societies have demarked insiders and outsiders, Europeans took this process further by extending the status of insider to

21684-428: The total volume of the Earth's oceans. Excluding its marginal seas, the Atlantic covers 81,760,000 km (31,570,000 sq mi) and has a volume of 305,811,900 km (73,368,200 cu mi). The North Atlantic covers 41,490,000 km (16,020,000 sq mi) (11.5%) and the South Atlantic 40,270,000 km (15,550,000 sq mi) (11.1%). The average depth is 3,646 m (11,962 ft) and

21840-562: The transport may last between 2 and 20 days depending on wind current patterns, and are shortest during the summer months. Therefore, the effects of the seasonal variability of the Florida Current on the wider reaching Gulf Stream is unknown. Wind speed, wind direction, topography, and temperature are important factors in determining current strength. Seasonal variation of weather in the South Florida region can help predict seasonal variability of current strength and transport. Stronger winds and higher temperatures lead to increased current flow due to

21996-403: The triangle exported enslaved Africans across the Atlantic Ocean to the Americas and the Caribbean Islands. The third and final part of the triangle was the return of goods to Europe from the Americas. The goods were the products of slave plantations and included cotton, sugar, tobacco, molasses and rum. Sir John Hawkins , considered the pioneer of the English slave trade, was the first to run

22152-410: The triangular trade, making a profit at every stop. The Atlantic slave trade was the result of, among other things, labour shortage , itself in turn created by the desire of European colonists to exploit New World land and resources for capital profits. Native peoples were at first utilized as slave labour by Europeans until a large number died from overwork and Old World diseases. Furthermore, in

22308-453: The upper layers of the circumpolar region, near the Drake Passage and the Falkland Islands. Both these currents receive some contribution from the Indian Ocean. On the African east coast, the small cyclonic Angola Gyre lies embedded in the large subtropical gyre. The southern subtropical gyre is partly masked by a wind-induced Ekman layer . The residence time of the gyre is 4.4–8.5 years. North Atlantic Deep Water flows southward below

22464-405: The west African coast and in the Americas which they had never previously encountered. Historian Pierre Chaunu termed the consequences of European navigation "disenclavement", with it marking an end of isolation for some societies and an increase in inter-societal contact for most others. Historian John Thornton noted, "A number of technical and geographical factors combined to make Europeans

22620-424: The western Atlantic and South Sandwich Trench (8,264 m or 27,113 ft) in the South Atlantic. There are numerous submarine canyons off northeastern North America, western Europe, and northwestern Africa. Some of these canyons extend along the continental rises and farther into the abyssal plains as deep-sea channels. In 1922, a historic moment in cartography and oceanography occurred. The USS Stewart used

22776-415: Was a captain of slave ships and recorded in his personal journal how Africans mutinied on ships, and some were successful in overtaking the crew. For example, in 1730 the slave ship Little George departed from the Guinea Coast in route to Rhode Island with a cargo of ninety-six enslaved Africans. A few of the slaves slipped out of their iron chains and killed three of the watchmen on deck and imprisoned

22932-424: Was applied to the southern Atlantic as late as the mid-19th century. During the Age of Discovery , the Atlantic was also known to English cartographers as the Great Western Ocean . The pond is a term often used by British and American speakers in reference to the northern Atlantic Ocean, as a form of meiosis , or ironic understatement. It is used mostly when referring to events or circumstances "on this side of

23088-429: Was captured by African traders and sold into slavery. Dahomey King Agaja from 1718 to 1740, opposed the Atlantic slave trade and refused to sell African people and attacked the European forts built along the slave coast in West Africa. Donna Beatriz Kimpa Vita in Kongo and Senegalese leader Abd al-Qadir, advocated resistance against the forced exportation of Africans. In the 1770s, leader Abdul Kader Khan opposed

23244-418: Was less than one year during the period of the slave trade because of malaria that was endemic in the African continent. An article from PBS explains: "Malaria, dysentery, yellow fever, and other diseases reduced the few Europeans living and trading along the West African coast to a chronic state of ill health and earned Africa the name 'white man's grave.' In this environment, European merchants were rarely in

23400-439: Was little more than to exploit the opportunity for immediate profits made by raiding and the seizure or purchase of trade commodities". Using the Canary Islands as a naval base, Europeans, at the time primarily Portuguese traders, began to move their activities down the western coast of Africa, performing raids in which slaves would be captured to be later sold in the Mediterranean. Although initially successful in this venture, "it

23556-437: Was more than capable of handling competition from preindustrial Europe". However, Anne Bailey, commenting on Thornton's suggestion that Africans and Europeans were equal partners in the Atlantic slave trade, wrote: [T]o see Africans as partners implies equal terms and equal influence on the global and intercontinental processes of the trade. Africans had great influence on the continent itself, but they had no direct influence on

23712-491: Was not long before African naval forces were alerted to the new dangers, and the Portuguese [raiding] ships began to meet strong and effective resistance", with the crews of several of them being killed by African sailors, whose boats were better equipped at traversing the west-central African coasts and river systems. By 1494, the Portuguese king had entered agreements with the rulers of several West African states that would allow trade between their respective peoples, enabling

23868-471: Was operating at trivial levels. In many years, not a single Spanish slave voyage set sail from Africa. Unlike all of their imperial competitors, the Spanish almost never delivered slaves to foreign territories. By contrast, the British, and the Dutch before them, sold slaves everywhere in the Americas. The second Atlantic system was the trade of enslaved Africans by mostly English, French, and Dutch traders and investors. The main destinations of this phase were

24024-522: Was prevalent in many parts of Africa for many centuries before the beginning of the Atlantic slave trade. An article from PBS explains the differences between African slavery and European slavery in the Americas . "It is important to distinguish between European slavery and African slavery. In most cases, slavery systems in Africa were more like indentured servitude in that the slaves retained some rights and children born to slaves were generally born free. The slaves could be released from servitude and join

24180-453: Was that, with much cheap land available and many landowners searching for workers, free European immigrants were able to become landowners themselves relatively quickly, thus increasing the need for workers. Labour shortages were mainly met by the English, French and Portuguese with African slave labour. Thomas Jefferson attributed the use of slave labour in part to the climate, and the consequent idle leisure afforded by slave labour: "For in

24336-468: Was used as a justification by Spain to take lands from non-Christians West of the Azores . The Doctrine of Discovery stated that non-Christian lands should be taken and ruled by Christian nations, and Indigenous people (Africans and Native Americans ) living on their lands should convert to Christianity. In 1493, Pope Alexander VI issued a papal bull called Inter Caetera which gave Spain and Portugal rights to claim and colonize all non-Christian lands in

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