Norway The Gulf Stream has this effect only on the northern parts of Norway, not in the south, despite what is commonly believed. The northern coast of Norway would thus be ice-covered if not for the Gulf Stream. As a side-effect, the Scandinavian Mountains prevent continental winds from reaching the coastline, causing very cool summers throughout Atlantic Norway. Oslo has more of a continental climate, similar to Sweden's. The mountain ranges have subarctic and tundra climates. There is also very high rainfall in areas exposed to the Atlantic, such as Bergen. Oslo, in comparison, is dry, being in a rain shadow.
Olaf II of Norway together are both traditionally regarded as the driving forces behind Norway's final conversion to Christianity. However, large stone crosses and other Christian symbols suggest that at least the coastal areas of Norway were deeply influenced by Christianity long before Olaf's time; with one exception, all the rulers of Norway back to Håkon the Good (c. 920–961) had been Christians; and Olaf's main opponent, Cnut the Great, was a Christian ruler. What seems clear is that Olaf made efforts to establish a church organization on a broader scale than before, among other things by importing bishops from England, Normandy and Germany.