From 6 December to 6 January, in Lapland starts the polar night – the period when the Sun is more than 24 hours does not appear over the horizon. What is a polar night, why it occurs and how affects person? We tried to answer key questions.
Where the polar night
This phenomenon can be observed in Finland, Norway, Northern Russia and in other countries located in Northern latitudes. Polar night can last for several months, immersing certain regions of our planet into darkness. At this time, the sun is always over the horizon and does not rise at all. After that long night gives way to the long polar day during which the sun doesn’t set.
Polar day in the summer, but the night – in the winter. This year the polar night in most of the province of Finland, Lapland, starts December 6 and runs until January 6. The locals are of course used to such phenomena, but the inhabitants of the southern lands such phenomena are of great interest.
The short polar night lasts all day, and the longest – up to six months.
By the way, you can also observe polar night in Lapland mounted cameras, which will broadcast the polar night for the entire duration.
Why is this happening
The onset of polar night and polar day observed due to the presence of the Earth’s tilt axis. That is why the polar region and pole nakloneny shifts relative to the Sun.
The polar night shrouds the settlements in a shorter period of time than the polar day. It is often accompanied by a striking phenomenon of the Aurora rapidly changing illumination of individual sections of the night sky.
Northern lights in Lapland
What is the Aurora?
This is a natural phenomenon associated with solar activity. It is formed when solar particles after prolonged solar flares fall into the space where they are attracted to the North magnetic pole. Particles interact with the upper layers of the atmosphere, resulting in releasing large amounts of energy and appears to glow.
As the polar night affects a person
Deficiency of sunlight leads to deficiency of serotonin the “happy hormone”. As a result, people living in areas of polar night, often there is depression, irritability and sleep disturbance.
Doctors recommend not to live in such conditions for more than 15 years, or the weakening of the immune system can lead to fatal consequences. If you plan to spend winter holidays in the cities, where there is this phenomenon, stock up on vitamins, get ready to actively exercise and sleep at least eight hours.
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