North Sea

North Sea
Location	Western Europe and Northern Europe
Coordinates	56°N 3°E / 56°N 3°E / 56; 3 (North Sea)
Type	Sea
Primary inflows	Baltic Sea, Elbe, Weser, Ems, Rhine/Waal, Meuse, Scheldt, Spey, Don, Dee, Tay, Forth, Tyne, Wear, Tees, Humber, Thames
Basin countries	United Kingdom (specifically England and Scotland), Norway, Denmark, Germany (specifically Lower Saxony and Schleswig-Holstein), the Netherlands, Belgium, Luxembourg, France, Switzerland, Italy, Liechtenstein, Austria, Czech Republic
Max. length	960 km (600 mi)
Max. width	580 km (360 mi)
Surface area	570,000 km2 (220,000 sq mi)
Average depth	95 m (312 ft)
Max. depth	700 m (2,300 ft)
Water volume	54,000 km3 (4.4×1010 acre⋅ft)
Salinity	3.4 to 3.5%
Max. temperature	18 °C (64 °F)
Min. temperature	6 °C (43 °F)
References	Seatemperature.org and Royal Belgian Institute of Natural Sciences

The North Sea lies between Great Britain, Denmark, Norway, Germany, the Netherlands, Belgium and France. An epeiric sea on the European continental shelf, it connects to the Atlantic Ocean through the English Channel in the south and the Norwegian Sea in the north. It is more than 970 kilometres (600 mi) long and 580 kilometres (360 mi) wide, covering 570,000 square kilometres (220,000 sq mi).

It hosts key north European shipping lanes and is a major fishery. The coast is a popular destination for recreation and tourism in bordering countries, and a rich source of energy resources, including wind and wave power.

The North Sea has featured prominently in geopolitical and military affairs, particularly in Northern Europe, from the Middle Ages to the modern era. It was also important globally through the power northern Europeans projected worldwide during much of the Middle Ages and into the modern era. The North Sea was the centre of the Vikings' rise. The Hanseatic League, the Dutch Republic, and Britain all sought to gain command of the North Sea and access to the world's markets and resources. As Germany's only outlet to the ocean, the North Sea was strategically important through both world wars.

The coast has diverse geology and geography. In the north, deep fjords and sheer cliffs mark much of its Norwegian and Scottish coastlines respectively, whereas in the south, the coast consists mainly of sandy beaches, estuaries of long rivers and wide mudflats. Due to the dense population, heavy industrialisation, and intense use of the sea and the area surrounding it, various environmental issues affect the sea's ecosystems. Adverse environmental issues – commonly including overfishing, industrial and agricultural runoff, dredging, and dumping, among others – have led to several efforts to prevent degradation and to safeguard long-term economic benefits.