I am the official currency of a country known for its stunning fjords, Vikings, and the Northern Lights. My name is derived from a word that originally meant 'neck' or 'throat'. My value fluctuates significantly with the price of oil, a major export of this nation. You'll find me on debit cards featuring designs of salmon and other iconic images. What currency am I?

1. My name shares etymological roots with a body part.
2. I am strongly tied to the price of a major natural resource.
3. The country using me is known for its high quality of life and picturesque landscapes.
4. My banknotes and coins often depict elements related to the sea and local wildlife.