Editing Norwegian Sea (section)

== Climate ==
The thermohaline circulation affects the climate in the Norwegian Sea, and the regional climate can significantly deviate from average. There is also a difference of about 10&nbsp;°C between the sea and the coastline. Temperatures rose between 1920 and 1960,<ref name="Wefer">Gerold Wefer, Frank Lamy, Fauzi Mantoura [https://books.google.com/books?id=wC7CF9Bd5CoC&pg=PA32 ''Marine Science Frontiers for Europe''], Springer, 2003 {{ISBN|3-540-40168-7}}, pp. 32–35</ref> and the frequency of storms decreased in this period. The storminess was relatively high between 1880 and 1910, decreased significantly in 1910–1960, and then recovered to the original level.<ref name="Sepp">[[Matti Seppälä]] [https://books.google.com/books?id=q33WekTp7tgC&pg=PA121 ''The Physical Geography of Fennoscandia''], Oxford University Press, 2005 {{ISBN|0-19-924590-8}}, pp. 121–141</ref>

In contrast to the Greenland Sea and Arctic seas, the Norwegian Sea is ice-free year round, owing to its warm currents.<ref name=bse/> The convection between the relatively warm water and cold air in the winter plays an important role in the Arctic climate.<ref name="Schäfer10">[[#refSchaefer|Schaefer, 2001]], pp. 10–17</ref> The 10-degree July isotherm (air temperature line) runs through the northern boundary of the Norwegian Sea and is often taken as the southern boundary of the Arctic.<ref name="Mulvaney">Kieran Mulvaney [https://archive.org/details/atendsofearthhis00mulv/page/23 ''At the Ends of the Earth: A History of the Polar Regions''], Iceland Press, 2001 {{ISBN|1-55963-908-3}}, p. 23</ref> In winter, the Norwegian Sea generally has the lowest air pressure in the entire Arctic and where most [[Icelandic Low]] depressions form. The water temperature in most parts of the sea is 2–7&nbsp;°C in February and 8–12&nbsp;°C in August.<ref name=bse/>

[[File:Bloom in the Norwegian Sea.jpg|thumb|[[Phytoplankton]] bloom in the Norwegian Sea.]]