86-633: The Trans-Catalina Trail is a long-distance trail which traverses Santa Catalina Island off the coast of southern California . From the eastern trailhead where Clarissa Avenue meets Crescent Avenue in Avalon out to Parson's Landing on the West end, then looping back to Two Harbors, the trail's official length is listed as 38.5 miles (62.0 km). Camping is allowed by permit from the Catalina Island Conservancy . There are five campgrounds along or near
172-480: 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
258-501: 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
344-685: 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
430-899: A large number of trekkers ( backpackers ). Typical trekking regions in Nepal are Annapurna , Dolpo , Langtang , Manaslu , Kangchenjunga and Mount Everest . In India, the Kashmir Valley is home to several trekking routes that traverse western sections of the Himalayas. Vishansar Lake , Gangabal Lake and Tarsar Lakes are accessible only through different trekking routes. Other popular trekking routes in India include Chandra Taal , Dzongri, Goechala, Gomukh , Hemkund , Kafni Glacier , Kailash - Manasarovar , Kedarnath , Kedartal , Milam Glacier , Nanda Devi Sanctuary , Pindari Glacier , Richenpong , Roopkund , Sar Pass , Satopanth Tal , Saurkundi Pass and
516-509: A long-distance route will be at least 50 km (30 mi) long, but many run for several hundred miles, or longer. Many routes are waymarked and may cross public or private land and/or follow existing rights of way . Generally, the surface is not specially prepared, and the ground can be rough and uneven in areas, except in places such as converted rail tracks or popular walking routes where stone-pitching and slabs have been laid to prevent erosion. In some places, official trails will have
602-830: A network of officially sanctioned footpaths in the United Kingdom which are well maintained and well waymarked across England and Wales. Examples are the Pennine Way and the South West Coast Path . The equivalent routes in Scotland are styled as Scotland's Great Trails ; they include the West Highland Way and the Speyside Way . The success of the Welsh government's 870-mile Wales Coast Path prompted an ongoing project of create
688-644: A safe and easy hike in any season, as well as raising awareness of the importance of protecting natural spaces and adopting sustainable behaviors. Long Distance Nature Trails in Japan : In Brazil, long-distance trails are regulated by two Federal Government decrees, and implemented and managed by government agencies in partnership with many NGOs, such as the Brazilian Trails Network Association ( Associação Rede Brasileira de Trilhas in Portuguese) and
774-587: A series of connected pre-existing rights of way, roads and open country with some informal links between them. There is also a coast-to-coast mountain-bike route in northern England that has the same trailheads as the walkers' path. GR 10 is a French GR footpath that runs the length of the Pyrenees Mountains , roughly paralleling the French–Spanish border on the French side. It runs west to east, from Hendaye on
860-584: A similar route for England. When completed, the King Charles III England Coast Path will be around 2,700 miles long. There are many other recognised, sometimes waymarked, long-distance footpaths in the UK which do not have National Trail status. The Long Distance Walkers Association (LDWA) has the most comprehensive online database of long-distance paths in the UK, and members are able to download GPX files of routes. The association also maintains
946-416: 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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#17328768721361032-550: Is Point Reyes , on the northern California coast at the Pacific Ocean. The Iditarod Trail connects the coastal cities of Seward and Nome, Alaska : a distance of around 1,600 kilometres (990 mi). The European long-distance paths (E-paths) traverse Europe, passing through many different countries. Among the longest are European walking route E8 and the Iron Curtain Trail (also known as EuroVelo 13). The latter
1118-606: 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
1204-577: Is a partially complete long-distance cycling route which will run along the entire length of the former Iron Curtain . During the period of the Cold War (c. 1947–1991), the Iron Curtain delineated the border between the Communist East and the capitalist West. Some of the longest walking routes worldwide: Long-distance mountain trails are of two broad kinds: linear trails and loop trails. In Europe
1290-543: Is applicable to other rail trails that exist throughout the world: Following the route of the railways, they cut through hills, under roads, over embankments and across gullies and creeks. Apart from being great places to walk, cycle or horse ride, rail trails are linear conservation corridors protecting native plants and animals. They often link remnant vegetation in farming areas and contain valuable flora and fauna habitat. Wineries and other attractions are near many trails as well as B&B's and other great places to stay. In
1376-463: 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
1462-498: 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
1548-559: 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
1634-825: 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
1720-693: 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
1806-762: 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
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#17328768721361892-455: Is the longest marked multi-use trail in the world, stretching 5,330 kilometres (3,310 mi) from Cooktown, Queensland , through New South Wales to Healesville, Victoria . This non-motorised trail runs the length of the rugged Great Dividing Range through national parks and private property and alongside wilderness areas . One of the objectives was to develop a trail that linked up the brumby tracks, mustering and stock routes along
1978-938: 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 ,
2064-763: 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
2150-633: The Bay of Biscay to Banyuls-sur-Mer on the Mediterranean Sea . The American Discovery Trail is a hiking and biking trail that crosses the continental United States from east to west, across the mid-tier of the United States 10,900 kilometres (6,800 mi). Horses can also be ridden on most of this trail. The eastern terminus is the Delmarva Peninsula on the Atlantic Ocean and the western terminus
2236-897: The Brittany Coast Path in France, the California Coastal Trail in the US, the South West Coast Path in England, the East Coast Trail in Canada, and the Otter Trail in South Africa. The King Charles III England Coast Path , in development by Natural England , will be around 4,350 kilometres (2,700 mi) long. It is expected to open by the end of 2024 as the longest coastal walking route in
2322-551: 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
2408-542: 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
2494-518: 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 '
2580-694: The EuroVelo routes. Some trails follow the towpaths of canal systems. A good example is the 845-kilometre (525 mi) New York State Canal System in New York . There also numerous routes that can be followed in Europe, which may be suitable for walkers, cyclists, horse riders and canoeists. Many long-distance trails have sections suitable for equestrians, and a few are suitable for horse riding throughout their length, or have been developed primarily for horse riding. The Bicentennial National Trail (BNT) in Australia
2666-467: 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
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2752-655: 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
2838-590: 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
2924-451: 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,
3010-489: The Pennine Bridleway , 192 km (119 miles), The Ridgeway , 139 km (86 miles), and the South Downs Way , 160 km (99 miles). Rail trails (or rail paths) are shared-use paths that make use of abandoned railway corridors. There are also rails with trails in the US that follow working rail tracks. Most rail trails have a gravel or dirt surface and can be used for walking, cycling, and often horse riding as well. The following description comes from Australia , but
3096-442: 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
3182-400: The Valley of Flowers . The Great Himalaya Trail is proposed to follow the Greater Himalaya Range from Namche Barwa in Tibet to Nanga Parbat in Pakistan, forming the world's highest mountain trail. A long-distance trail network in the southern Andes, the 3,000-kilometre (1,900 mi) Greater Patagonian Trail , was first described in 2014. It currently connects Santiago de Chile with
3268-403: The Via Alpina consists of five connected hiking trails across the alpine regions of Slovenia , Austria , Germany , Liechtenstein , Switzerland , Italy , France and Monaco . It is 5,000 km (3,100 miles) long, with 342 day stages. Circular routes include the Tour du Mont Blanc , which passes through the Alps of France, Switzerland, and Italy. In the Balkans region, the Peaks of
3354-521: 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
3440-399: 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
3526-400: 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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3612-434: 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
3698-411: 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 ,
3784-557: The Atlantic Forest Trail Institute. The aim is to create a national system of trails that are pleasant to hike, but that also generate employment and income and function as conservation tools by linking protected areas with natural corridors. There are more than 120 trails in different stages of implementation in 25 of the 27 Brazilian states , connecting all Brazilian biomes. As of January 2022, Brazil has more than 5,500 km of managed trails and another 20,500 km planned. Long-distance trails in Brazil: These follow coastlines; examples are
3870-407: 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
3956-468: 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
4042-403: 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,
4128-455: 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
4214-409: 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
4300-471: The Balkans Trail and High Scardus Trail connect Albania , Kosovo and Montenegro or North Macedonia respectively through a network of combined almost 700 kilometres (430 mi). In the United States, notable linear trails include the Appalachian Trail , 3,500 kilometres (2,200 mi), the Pacific Crest Trail , 4,300 kilometres (2,700 mi) and the Continental Divide Trail , 5,000 kilometres (3,100 mi). The first long-distance hiking trail in
4386-404: 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
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#17328768721364472-514: The Great Dividing Range, thus allowing one legally to ride the routes of stockmen and drovers who once traveled these areas with pack horses . The Bicentennial National Trail is suitable for self-reliant horse riders, fit walkers and mountain bike riders. In the United Kingdom, the British Horse Society is developing a network of horse trails known as the National Bridleroute Network . A number of long-distance multi-use trails have been created in England, including three National Trails :
4558-403: The LDWA National Trails Register, with different levels of membership for people who have completed five, 10, 15 or all 19 of the National Trails and Great Trails. An annual report is published in April in the association's magazine, Strider. The Kerry Way , in south-west Ireland, is the longest of the Irish waymarked trails and circumnavigates the highest mountain range in Ireland. Along with
4644-405: 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
4730-468: 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
4816-437: 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
4902-655: The Southern Patagonian Icefield and explores the remote areas of the Patagonian Andes in the border region between Chile and Argentina. The entire network currently incorporates more than 16,000-kilometre (9,900 mi) of routes and provides many packrafting options. These routes have been constructed mainly for bicycle touring . Some are restricted to use by only non-motorized bikes while others are multi-use recreational (i.e. hiking, horseback riding, jogging, rollerblading or walking). Some long-distance cycling routes are hundreds of miles long, such as Australia's mainly off-road Munda Biddi Trail , or even thousands of miles, such as
4988-508: The US was begun in 1910 and named The Long Trail . Notable circular trails include the Tahoe Rim Trail and the Wonderland Trail (which encircles Mount Rainier ). The Australian Alps Walking Track traverses the alpine areas of Victoria , New South Wales and the Australian Capital Territory . It is 655 km (407 miles) long, starting at Walhalla, Victoria , and running through to Tharwa, Australian Capital Territory near Canberra . The Himalayan routes are famous for attracting
5074-398: The US, the 43-kilometre (27 mi) Cheshire Rail Trail , in New Hampshire , can be used by hikers, horseback riders, snowmobilers, cross-country skiers, cyclists, or even dog-sledders. In Canada , following the abandonment of the Prince Edward Island Railway in 1989, the government of Prince Edward Island purchased the right-of-way to the entire railway system. The Confederation Trail
5160-432: The adjoining Dingle Way it is noted for its scenic views of the Atlantic , loughs and mountains. Long-distance trails in Hong Kong : Japan has a network of ten long-distance trails called Long Distance Nature Trails. Their creation is the result of a Ministry of Environment initiative to highlight the specific environmental, cultural or historic landscapes through which the trails pass. They also aim to allow hikers
5246-412: 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,
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#17328768721365332-425: 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
5418-431: 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
5504-544: 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
5590-430: 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
5676-454: 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
5762-474: 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
5848-429: 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
5934-454: 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
6020-407: 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
6106-510: 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
6192-563: 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)
6278-425: 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
6364-611: 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
6450-637: 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
6536-438: 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
6622-534: 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
6708-421: 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
6794-760: The surface specially prepared to make the going easier. Historically, and still nowadays in countries where most people move on foot or with pack animals, long-distance trails linked far away towns and regions. Such paths followed "logical" routes, that can be approximated to least-cost paths . GR footpaths are long-distance footpaths in Italy, France, Belgium, the Netherlands, Spain and Portugal (the Alta Via (Italian), Grande Randonnée (French), Grote Routepaden or Lange-afstand-wandelpaden (Dutch), Grande Rota (Portuguese) or Gran Recorrido (Spanish)). National Trails are
6880-476: 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
6966-626: The trail: Hermit Gulch, Black Jack, Little Harbor, Two Harbors, and Parsons Landing. Hikers usually take between 2 and 5 days to complete the route. This United States trail or long-distance path–related article is a stub . You can help Misplaced Pages by expanding it . Long-distance trail A long-distance trail (or long-distance footpath , track, way, greenway ) is a longer recreational trail mainly through rural areas used for hiking , backpacking , cycling , horse riding or cross-country skiing . They exist on all continents except Antarctica. Many trails are marked on maps. Typically,
7052-672: 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
7138-424: 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
7224-466: The world and Britain's longest National Trail . These may be cross-country paths, or may follow roads or other ways, and often intersect with many other trails. Examples are Wainwright's Coast-to-Coast path in northern England, and the GR 10 in France . The English Coast to Coast route, despite being amongst the best-known long-distance walking routes in England, is not an official National Trail , but simply
7310-485: 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
7396-544: Was developed as a tip-to-tip walking and cycling gravel rail trail which doubles as a monitored and groomed snowmobile trail during the winter months, operated by the PEI Snowmobile Association. Atlantic Ocean 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
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