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Bay of Biscay

geography Maturity 7-9 Next article →

The Bay of Biscay is a significant gulf within the northeast Atlantic Ocean.

Acantilados Vizcaya
Acantilados Vizcaya

It is situated south of the Celtic Sea and stretches along the western coast of France. The bay extends from Point Penmarc'h to the Spanish border. It also follows the northern coast of Spain toward Cape Ortegal. In France, the area is often called the Gulf of Gascony. In Spain, it is known as the Gulf of Biscay. The southernmost portion of this body of water is called the Cantabrian Sea. The English name likely refers to Biscay, which represents western Basque districts on the northern Spanish coast.

Geographical features within the bay create unique and often difficult maritime conditions. Parts of the continental shelf extend deep into the bay. This results in many areas having fairly shallow waters. These shallow sections contribute to the famously rough seas found in the region. The bay is known for some of the fiercest weather in the Atlantic Ocean. Heavy storms are especially common during the winter months. Abnormally high waves can occur here, which historically caused many merchant vessels to founder.

Biarritz Phare et Grande Plage
Biarritz Phare et Grande Plage

Weather patterns in the bay are complex and varied. In late spring and early summer, a large fog triangle fills the southwestern half. This fog can extend a few kilometers inland. As winter approaches, the weather becomes severe due to depressions entering from the west. These depressions may move toward the British Isles or enter the Ebro Valley. Once in the valley, they dry out before becoming powerful thunderstorms near the Mediterranean Sea. These systems bring light but constant rain to the shores. This rain is known by several local names, such as orballo, sirimiri, morrina, orbayu, orpin, or calabobos.

Specific wind phenomena also characterize the local climate. Powerful windstorms called galernas can form when air pressure falls rapidly. These storms travel along the Gulf Stream at great speeds. They can resemble a hurricane and reach the bay with maximum power. One such example was Cyclone Klaus. The Gulf Stream itself enters the bay by following the border of the continental shelf. It moves in an anti-clockwise direction known as the Rennell Current. This current helps keep the water temperatures moderate throughout the entire year.

Many significant rivers flow into the Bay of Biscay from the surrounding land. The main rivers include the Loire, the Garonne, and the Ador. Other notable rivers are the Odet, Aven, Laïta, Scorff, Blavet, Vilaine, Lay, Sèvre Niortaise, Charente, Seudre, Eyre, Nivelle, Untxin, Bidasoa, Oiartzun, Urumea, Oria, Urola, Deba, Artibai, Lea, Oka, Nervión, Agüera, Asón, Miera, Pas, Saja, Nansa, Deva, Sella, Nalón, Navia, Esva, Eo, Landro, and Sor. These rivers connect the interior of France and Spain to the Atlantic. Major cities are located near these shores, including Lorient, Vannes, Saint-Nazaire, Bordeaux, Bayonne, Biarritz, Nantes, La Rochelle, Donostia-San Sebastián, Bilbao, Santander, Gijón, and Avilés.

History records many notable naval engagements within these waters. The Romans referred to the area in the 1st century BC as Sinus Cantabrorum. During the second year of the French Revolutionary Wars in 1795, the Biscay campaign involved battles between British and French fleets. The area saw significant action during World War II. German U-boat crews called the bay the "Valley of Death" due to repeated losses from RAF attacks. Submarines have also faced many dangers here, including the loss of the USS Reuben James in 1918 after striking a mine. In 1970, the Soviet submarine K-129 sank due to a fire that damaged its nuclear reactors. Because the water is so deep, no salvage operation was attempted.

The bay supports diverse wildlife and delicate ecosystems. The Plaiaundi Ecology Park is a 24-hectare coastal wetland where the Bidasoa River meets the sea. This park contains various birds, reptiles, mammals, and insects. Many people use ferries from cities like Gijón or Portsmouth to observe cetaceans, which are marine mammals like whales and dolphins. The bay is one of the few places where beaked whales, such as the Cuvier's beaked whale, are frequently seen. The Santander Canyon and Torrelavega Canyon are excellent areas for spotting larger species. While North Atlantic right whales once used the bay for feeding, they were nearly wiped out by whaling before the 1850s. Recent sightings of this endangered species have been very rare.

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File:Acantilados Vizcaya.JPG
Acantilados Vizcaya.JPG
File:Biarritz Phare et Grande Plage.jpg
Biarritz Phare et Grande Plage.jpg
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