The northern region of Europe has several definitions. A restrictive definition may describe Northern Europe as being roughly north of the southern coast of the Baltic Sea, which is about 54°N, or may be based on other geographical factors such as climate and ecology.
The climate is mainly Oceanic climate (Cfb), Humid continental climate (Dfb), Subarctic climate (Dfc and Dsc) and Tundra (ET).
British IslesScandinavian PeninsulaFennoscandiaJutland and Baltic region
Northern Europe might be defined roughly to include some or all of the following areas: British Isles, Fennoscandia, the peninsula of Jutland, the Baltic plain that lies to the east, and the many islands that lie offshore from mainland Northern Europe and the main European continent. In some cases, Greenland is also included, although it is only politically European, comprising part of the Kingdom of Denmark, and not considered to be geographically in Europe.
The area is partly mountainous, including the northern volcanic islands of Iceland and Jan Mayen, and the mountainous western seaboard, Scotland and Scandinavia, and also often includes part of the large plain east of the Baltic sea.
The entire region's climate is at least mildly affected by the Gulf Stream. From the west climates vary from maritime and maritime subarctic climates. In the north and central climates are generally subarctic or Arctic and to the east climates are mostly subarctic and temperate/continental.
Just as both climate and relief are variable across the region, so too is vegetation, with sparse tundra in the north and high mountains, boreal forest on the north-eastern and central regions temperate coniferous forests (formerly of which a majority was in the Scottish Highlands and south west Norway) and temperate broadleaf forests growing in the south, west and temperate east.
There are various definitions of Northern Europe which always include the Nordic countries, often the British Isles and/or Baltic states, and sometimes Greenland, northern Germany, northern Belarus and northwest Russia.