polar night in a sentence

1. Matters are made worse by the approaching polar night and magnetic storms.
2. Other jet streams, such as the polar night jet, occur at higher altitudes.
3. During the polar night, a lot of aurorae can be observed.
4. Since Lappland is located above the Arctic Circle, the polar night has begun.
5. The polar night is between the end of November to mid-January.
6. It's difficult to find polar night in a sentence.
7. The Polar Night does not mean that it becomes totally dark.
8. Polar night, on the other hand, lasts from 23 November to 19 January.
9. Activity is at a stand-still during the polar night, which lasts for many months.
10. The Arctic experiences midnight sun in the summer and polar night in the winter.
11. :The six months of Polar night is a common mistake.
12. The polar night jet which exists below this, is weak in the early winter.
13. In addition, there were limited hours of daylight to fly, due to the polar night.
14. Winter, and three months of bitter cold and polar night, are a few weeks away.
15. Accordingly, Polar night ( " kaamos " ) prevails between December 2 and January 11.
16. Thus the polar night jet weakens and simultaneously becomes distorted by the growing planetary waves.
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