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Bay of Biscay

Coordinates:45°30′N04°24′W / 45.500°N 4.400°W /45.500; -4.400
From Wikipedia, the free encyclopedia
Gulf of the northeast Atlantic Ocean located south of the Celtic Sea
Not to be confused withBiscay Bay in Canada orBiscayne Bay in the United States.
For the bay in Auckland, New Zealand, seeFrench Bay / Otitori Bay. For the soil type, seeBay of Biscay soil.
Bay of Biscay
Spanish coastline
Map of the Bay of Biscay
Bathymetric map of the Bay of Biscay
LocationWestern Europe andSouthern Europe
Coordinates45°30′N04°24′W / 45.500°N 4.400°W /45.500; -4.400
TypeGulf
Ocean/sea sourcesAtlantic Ocean
Basin countriesFrance andSpain
Max. length593.7 km (368.9 mi)
Max. width511.1 km (317.6 mi)
Surface area223,000 km2 (86,000 sq mi)
Average depth1,744 m (5,722 ft)
Max. depth4,735 m (15,535 ft)
Water volume389,000 km3 (93,000 cu mi)
Salinity35 g/L

TheBay of Biscay (/ˈbɪsk,-ki/BISS-kay, -⁠kee) is agulf of the northeastAtlantic Ocean located south of theCeltic Sea. It lies along the western coast ofFrance fromPoint Penmarc'h to theSpanish border, and along the northern coast of Spain, extending westward toCape Ortegal.

The average depth is 1,744 m (5,722 ft) and the greatest depth is 4,735 m (15,535 ft).[1]

Etymology

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The Bay of Biscay is known in Spain as the Gulf of Biscay (Spanish:Golfo de Vizcaya;Basque:Bizkaiko Golkoa). In France, it is called the Gulf ofGascony (French:Golfe de Gascogne[ɡɔl.f(ə)ɡas.kɔɲ];Occitan:Golf de Gasconha;Breton:Pleg-mor Gwaskogn;Basque:Gaskoiniako Golkoa). InLatin, the bay was known asSinus Cantabrorum (Cantabrian Gulf); the nameCantabrian Sea is still used locally for the southern area of the Bay of Biscay that washes over the northern coast of Spain (Cantabria). The English name comes fromBiscay on the northern Spanish coast, probably standing for thewestern Basque districts (Biscay up to the early 19th century).

Geography

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Basque coast along the Bay of Biscay
Biarritz Beach (French Basque Country)

Parts of thecontinental shelf extend far into the bay, resulting in fairly shallow waters in many areas and thus the rough seas for which the region is known. Heavy storms occur in the bay, especially during the winter months. The Bay of Biscay is home to some of theAtlantic Ocean's fiercestweather; abnormally high waves occur there.[2] Up until recent years it was a regular occurrence for merchant vessels to founder in Biscay storms.

Extent

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TheInternational Hydrographic Organization defines the limits of the Bay of Biscay as "a line joiningCap Ortegal (43°46′N7°52′W / 43.767°N 7.867°W /43.767; -7.867) toPenmarch Point (47°48′N4°22′W / 47.800°N 4.367°W /47.800; -4.367)".[3]

The southernmost portion is theCantabrian Sea.[4]

Rivers

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The main rivers that empty into the Bay of Biscay areLoire,Charente,Garonne,Dordogne,Adour,Nivelle,Bidasoa,Oiartzun,Urumea,Oria,Urola,Deba,Artibai,Lea,Oka,Nervión,Agüera,Asón,Miera,Pas,Saja,Nansa,Deva,Sella,Nalón,Navia,Esva,Eo,Landro andSor.

Climate

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In late spring and early summer, a large fog triangle fills the southwestern half of the bay, covering just a few kilometres inland.

As winter begins, weather becomes severe. Depressions enter from the west very frequently, and either they bounce north to theBritish Isles or they enter theEbro Valley, dry out, and are finally reborn in the form of powerful thunderstorms as they reach theMediterranean Sea. These depressions cause severe weather at sea and bring light but very constant rain to its shores (known asorballo,sirimiri,morrina,orbayu,orpin orcalabobos). Sometimes powerful windstorms form if the pressure falls rapidly (galerna), traveling along theGulf Stream at great speed, resembling a hurricane, and finally crashing in this bay with their maximum power, such as theKlaus storm.[5]

TheGulf Stream enters the bay following the continental shelf's border anti-clockwise (theRennell Current), keeping temperatures moderate all year long.

Main cities

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The main cities on the shores (or close to) of the Bay of Biscay areBordeaux,Bayonne,Biarritz,Nantes,La Rochelle,Donostia-San Sebastián,Bilbao,Santander,Gijón andAvilés.

History

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The southern end of the gulf is also called"Mar Cantábrico" in Spanish (Cantabrian Sea), from theEstaca de Bares, as far as the mouth ofAdour river, but this name is not generally used in English. It was named by Romans in the 1st century BC asSinus Cantabrorum (Bay of theCantabri) and also,Mare Gallaecum (the Sea of theGalicians). On some medieval maps, the Bay of Biscay is marked asEl Mar del los Vascos (the Basque Sea).[6]

The Bay of Biscay has been the site of many famous naval engagements over the centuries. In 1592 the Spanish defeated an English fleet during theBattle of the Bay of Biscay. TheBiscay campaign of June 1795 consisted of a series of manoeuvres and two battles fought between the BritishChannel Fleet and the French Atlantic Fleet off the southern coast ofBrittany during the second year of theFrench Revolutionary Wars. TheUSS Californian sank here after striking anaval mine on 22 June 1918.[7] In 1920 theSS Afrique sank after losing power and drifting into a reef in a storm with the loss of 575 lives. On 28 December 1943, theBattle of the Bay of Biscay was fought betweenHMS Glasgow andHMS Enterprise, and a group of German destroyers as part ofOperation Stonewall duringWorld War II. The area became known as the "Valley of Death" byU-boat crews following a series of repeated losses fromRAF attacks on U-boats from 1943 until the end of the war.[8] TheU-667 sank on 25 August 1944 in position46°00′N01°30′W / 46.000°N 1.500°W /46.000; -1.500, when she struck a mine. All hands were lost.

On 12 April 1970,Soviet submarine K-8 sank in the Bay of Biscay due to a fire that crippled the submarine's nuclear reactors. An attempt to save the sub failed, resulting in the death of forty sailors and the loss of four nuclear torpedoes. Due to the great depth (15,000 ft or 4,600 m), no salvage operation was attempted.[citation needed]

Wildlife

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Plaiaundi Ecology Park

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ThePlaiaundi Ecology Park is a 24-hectare coastal wetland lying where theBidasoa River meets the sea in the Bay of Biscay.The nature ofPlaiaundi consists of a wide variety offlora (visitors view them mainly in the spring) andfauna (visitors with binoculars arrive all during the year, because of the birds' migratory habits). This nature park contains a variety ofbirds,reptiles,mammals andinsects.[9]

Marine mammals

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See also:Whale watching

The car ferries fromGijón toNantes/Saint-Nazaire,Portsmouth toBilbao and fromPlymouth,Portsmouth andPoole toSantander provide one of the most convenient ways to seecetaceans in European waters. Often specialist groups take the ferries to collect more information. Volunteers and employees of ORCA regularly observe and monitor cetacean activity from thebridge of the ships onBrittany Ferries' Portsmouth to Santander route. Many species ofwhales anddolphins can be seen in this area. Most importantly, it is one of the few places in the world where thebeaked whales, such as theCuvier's beaked whale, have been observed relatively frequently. Biscay Dolphin Research monitored cetacean activity from theP&O Ferries cruise ferryPride of Bilbao, on voyages from Portsmouth to Bilbao.

North Atlantic right whales, one of the most endangered species of whales, once came to the bay for feeding and probably for calving as well, butwhaling activities by Basque people almost wiped them out sometime prior to the 1850s. The eastern population of this species are considered to be almost extinct, and there has been no record of right whales in the Bay of Biscay except for a pair in 1977 (possibly a mother and calf) at43°00′N10°30′W / 43.000°N 10.500°W /43.000; -10.500,[10] and another pair in June 1980. Other records in the late 20th century include one offGalicia at43°00′N10°30′W / 43.000°N 10.500°W /43.000; -10.500 in September 1977 reported by a whaling company and another one seen off the Iberian Peninsula.

The best areas to see the larger cetaceans are in the deep waters beyond thecontinental shelf, particularly over theSantander Canyon andTorrelavega Canyon in the south of the Bay.

The algaColpomenia peregrina was introduced and first noticed in 1906 by oyster fishermen in the Bay of Biscay.

Grammatostomias flagellibarba (scaleless dragonfish) are native to these waters.[11]

See also

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References

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  1. ^"Bay of Biscay". Eoearth.org. Archived fromthe original on 2015-07-20. Retrieved2015-07-17.
  2. ^A Summary of Wave Data Needs and Availability: A Report. 1979. p. 7.Archived from the original on 2023-04-06. Retrieved2021-01-05.The Gulf Stream off Cape Hatteras, the Gulf of Alaska, the English Channel, and the Bay of Biscay are some of the other areas where storms and current combine to produce abnormally high, steep waves.
  3. ^"Limits of Oceans and Seas, 3rd edition + corrections"(PDF). International Hydrographic Organization. 1971. p. 42 [corrections to page 13]. Archived fromthe original(PDF) on 8 October 2011. Retrieved28 December 2020.
  4. ^VVAA (2012)."Estrategia marina. Demarcación marina Noratlántica. Parte I. Marco general evaluación inicial y buen estado ambiental"(PDF) (in Spanish).Archived(PDF) from the original on 27 November 2020. Retrieved22 January 2021.
  5. ^"Why the Bay of Biscay is Dangerous for Ships?".Marine Insight. 2011-10-21.Archived from the original on 2019-05-07. Retrieved2019-05-07.
  6. ^"El mar de los vascos, II: del Golfo de Vizcaya al Mediterráneo"(PDF). Euskomedia.org. Archived fromthe original(PDF) on 2018-07-29. Retrieved2015-07-17.
  7. ^"USS Californian (1918–1918)". History.navy.mil. Archived fromthe original on 2004-12-24. Retrieved2015-07-17.
  8. ^"The Bay of Biscay".uboat.net.Archived from the original on 2024-07-06. Retrieved2024-07-06.
  9. ^"Plaiaundi Ecology Park | Plans to know the Basque Country | Tourism E…".archive.is. 2013-02-22.Archived from the original on 2013-02-22. Retrieved2021-07-24.
  10. ^Reeves, R.R. & Mitchell, E. (1986)."American pelagic whaling for right whales in the North Atlantic"(PDF).Report of the International Whaling Commission (Special Issue 10):221–254. Retrieved2013-10-09.[permanent dead link]
  11. ^Froese, R.; D. Pauly, eds. (2016)."Grammatostomias flagellibarba".FishBase. Archived fromthe original on 2015-08-25.

External links

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