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Portugal Current
North Atlantic currents The Portugal Current is a weak ocean current that flows south along the coast of Portugal and the Iberian Peninsula. Some publications define this current as part of the Canary Current, while others distinguish it as a separate current. The Portugal Current system is supplied mainly by the intergyre zone in the Atlantic, a region of weak circulation between the North Atlantic Current to the north and the Azores Current to the south. It is estimated, on average, to extend about 300 km beyond the shelf. It is also influenced by the more dominant neighboring Canary and Azores Currents, marking the northern extent of the Canary current. Other significant influences include seasonal winds, freshwater runoff from the Iberian Peninsula, the bottom topography found along the continental shelf break and slope, and the three main underlying water masses that are found below the seasonally variable surface layer. General water temperatures are between , depending o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mediterranean
The Mediterranean Sea is a sea connected to the Atlantic Ocean, surrounded by the Mediterranean Basin and almost completely enclosed by land: on the north by Western and Southern Europe and Anatolia, on the south by North Africa, and on the east by the Levant. The Sea has played a central role in the history of Western civilization. Geological evidence indicates that around 5.9 million years ago, the Mediterranean was cut off from the Atlantic and was partly or completely desiccated over a period of some 600,000 years during the Messinian salinity crisis before being refilled by the Zanclean flood about 5.3 million years ago. The Mediterranean Sea covers an area of about , representing 0.7% of the global ocean surface, but its connection to the Atlantic via the Strait of Gibraltar—the narrow strait that connects the Atlantic Ocean to the Mediterranean Sea and separates the Iberian Peninsula in Europe from Morocco in Africa—is only wide. The Mediterranean Sea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kelp Forest
Kelp forests are underwater areas with a high density of kelp, which covers a large part of the world's coastlines. Smaller areas of anchored kelp are called kelp beds. They are recognized as one of the most productive and dynamic ecosystems on Earth.Mann, K.H. 1973. Seaweeds: their productivity and strategy for growth. Science 182: 975-981. Although algal kelp forest combined with coral reefs only cover 0.1% of Earth's total surface, they account for 0.9% of global Primary production, primary productivity. Kelp forests occur worldwide throughout temperate and polar region, polar coastal oceans. In 2007, kelp forests were also discovered in tropical waters near Ecuador.Graham, M.H., B.P. Kinlan, L.D. Druehl, L.E. Garske, and S. Banks. 2007. Deep-water kelp refugia as potential hotspots of tropical marine diversity and productivity. Proceedings of the National Academy of Sciences 104: 16576-16580. Physically formed by brown macroalgae, kelp forests provide a unique habitat for m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Peniche, Portugal
Peniche () is a seaside municipality and a city located in the Leiria District of Central Portugal. It has 26,431 inhabitants, in an area of 77.55 km2. The city itself has a population of about 15,600 inhabitants. The present mayor is Henrique Bertino, elected by the independent coalition GCEPP (''Grupo de Cidadãos Eleitores por Peniche''; Electors for Peniche Group of Citizens). History and landmarks The city was built on a rocky peninsula which is considered by geologists a unique example of the Toarcian turnover during the worldwide Early Jurassic extinction. Peniche is known for its long beaches, which are popular for recreational activities and sports such as surfing, windsurfing, bodyboarding and kite surfing. These beaches are consistently windy and have good surf breaks with '' Supertubos'', i.e., waves forming fast and powerful tubes, considered among the best in Europe. The area has been called the "European Pipeline", after the Banzai Pipeline in Hawaii. Penic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Laminaria Hyperborea
''Laminaria hyperborea'' is a species of large brown alga, a kelp in the family Laminariaceae, also known by the common names of tangle and cuvie. It is found in the sublittoral zone of the northern Atlantic Ocean. A variety, ''Laminaria hyperborea f. cucullata'' (P.Svensden & J.M.Kain, 1971) is known from more wave sheltered areas in Scandinavia. Description ''Laminaria hyperborea'' is a massive, leathery seaweed, up to 360 cm long.Newton, L. 1931. ''A Handbook of the British Seaweeds.'' British Museum, London The holdfast is large and cone-shaped, with branched rhizoids, looking rather like a bird's foot. The stipe is circular in cross section, rough, thick at the base and tapering upwards. Older stipes are often covered with epiphytic red algae. The laminate blade is deeply divided into linear segments and is yellowish brown with large digitate segments. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Espinho, Portugal
Espinho () is a city and a municipality located in the Aveiro District, Portugal. It is located in both the Greater Porto and the Metropolitan Area of Porto, 16 km from its city centre. It is one of the smallest municipalities in Portugal and was, until 1899, part of the Santa Maria da Feira Municipality. In 2021, Espinho had a population of 31,027, a slight decrease from the previous census in 2011, when 31,786 were registered, in an area of 21.06 km². The current Mayor is Miguel Reis, elected by the PS. It is a beach resort and a zone of legal gambling with a casino - ''Casino Solverde''. Its fair - ''Feira de Espinho'', having been first organised in 1894, is well known in Portugal. The city is home to ''CINANIMA - Festival Internacional de Cinema de Animação'', an international animation festival, and FEST - New Directors New Films Festival', an international film festival. The municipal holiday is June 16. Sports Volleyball The city, known as the volleybal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cape Finisterre
Cape Finisterre (, also ; gl, Cabo Fisterra, italic=no ; es, Cabo Finisterre, italic=no ) is a rock-bound peninsula on the west coast of Galicia, Spain. In Roman times it was believed to be an end of the known world. The name Finisterre, like that of Finistère in France, derives from the Latin , meaning "end of the earth". It is sometimes said to be the westernmost point of the Iberian Peninsula. However, Cabo da Roca in Portugal is about farther west and thus the westernmost point of continental Europe. Even in Spain Cabo Touriñán is 124 metres (135 yards) farther west. Monte Facho is the name of the mountain on Cape Finisterre, which has a peak that is above sea level. A prominent lighthouse is at the top of Monte Facho. The seaside town of Fisterra is nearby. The Artabri were an ancient Gallaecian Celtic tribe that once inhabited the area. Geography Cape Finisterre has several beaches, including O Rostro, Arnela, Mar de Fora, Langosteira, Riveira, and Corbeiro. Ma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cape St
A cape is a clothing accessory or a sleeveless outer garment which drapes the wearer's back, arms, and chest, and connects at the neck. History Capes were common in medieval Europe, especially when combined with a hood in the chaperon. They have had periodic returns to fashion - for example, in nineteenth-century Europe. Roman Catholic clergy wear a type of cape known as a ferraiolo, which is worn for formal events outside a ritualistic context. The cope is a liturgical vestment in the form of a cape. Capes are often highly decorated with elaborate embroidery. Capes remain in regular use as rainwear in various military units and police forces, in France for example. A gas cape was a voluminous military garment designed to give rain protection to someone wearing the bulky gas masks used in twentieth-century wars. Rich noblemen and elite warriors of the Aztec Empire would wear a tilmàtli; a Mesoamerican cloak/cape used as a symbol of their upper status. Cloth and clothing ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eddies
In fluid dynamics, an eddy is the swirling of a fluid and the reverse current created when the fluid is in a turbulent flow regime. The moving fluid creates a space devoid of downstream-flowing fluid on the downstream side of the object. Fluid behind the obstacle flows into the void creating a swirl of fluid on each edge of the obstacle, followed by a short reverse flow of fluid behind the obstacle flowing upstream, toward the back of the obstacle. This phenomenon is naturally observed behind large emergent rocks in swift-flowing rivers. An eddy is a movement of fluid that deviates from the general flow of the fluid. An example for an eddy is a vortex which produces such deviation. However, there are other types of eddies that are not simple vortices. For example, a Rossby wave is an eddy which is an undulation that is a deviation from mean flow, but doesn't have the local closed streamlines of a vortex. Swirl and eddies in engineering The propensity of a fluid to swirl is used t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Portugal
Portugal, officially the Portuguese Republic ( pt, República Portuguesa, links=yes ), is a country whose mainland is located on the Iberian Peninsula of Southwestern Europe, and whose territory also includes the Atlantic archipelagos of the Azores and Madeira. It features the westernmost point in continental Europe, and its Iberian portion is bordered to the west and south by the Atlantic Ocean and to the north and east by Spain, the sole country to have a land border with Portugal. Its two archipelagos form two autonomous regions with their own regional governments. Lisbon is the capital and largest city by population. Portugal is the oldest continuously existing nation state on the Iberian Peninsula and one of the oldest in Europe, its territory having been continuously settled, invaded and fought over since prehistoric times. It was inhabited by pre-Celtic and Celtic peoples who had contact with Phoenicians and Ancient Greek traders, it was ruled by the Ro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Downwelling
Downwelling is the process of accumulation and sinking of higher density material beneath lower density material, such as cold or saline water beneath warmer or fresher water or cold air beneath warm air. It is the ''sinking'' limb of a convection cell. Upwelling is the opposite process, and together, these two forces are responsible in the oceans for the thermohaline circulation. The sinking of the cold lithosphere at subduction zones is another example of downwelling in plate tectonics. Oceanic downwelling Downwelling occurs in anti-cyclonic regions of the ocean where warm rings spin clockwise, causing surface convergence. When these surface waters converge, the surface water is pushed downwards. Downwelling can also occur as a result of the wind driving the sea towards the coastline. Downwelling regions have low productivity because the nutrients in the water column are used but are not continuously replenished by cold, nutrient-rich water from below the surface. Oxygenati ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Upwelling
Upwelling is an oceanographic phenomenon that involves wind-driven motion of dense, cooler, and usually nutrient-rich water from deep water towards the ocean surface. It replaces the warmer and usually nutrient-depleted surface water. The nutrient-rich upwelled water stimulates the growth and reproduction of primary producers such as phytoplankton. The biomass of phytoplankton and the presence of cool water in those regions allow upwelling zones to be identified by cool sea surface temperatures (SST) and high concentrations of chlorophyll-a. The increased availability of nutrients in upwelling regions results in high levels of primary production and thus fishery production. Approximately 25% of the total global marine fish catches come from five upwellings, which occupy only 5% of the total ocean area.Jennings, S., Kaiser, M.J., Reynolds, J.D. (2001) "Marine Fisheries Ecology." Oxford: Blackwell Science Ltd. Upwellings that are driven by coastal currents or diverging open oc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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