Complex sentence: This is exceptionally cold for a sea-level settlement more than 1/3 from the North Pole en route to the Equator and annually up to 15 ° C colder than marine areas of Northern Europe on similar parallels.
Split into simpler sentences: This is exceptionally cold for a sea-level settlement more than 1/3 from the North Pole en route to the Equator. Annual temperatures are up to 15 ° C colder than marine areas of Northern Europe on similar parallels.