How do you think you would manage if you had to live for three months if near complete darkness? Do you think it would affect your mood? Do you think you'd sleep a lot more? Perhaps you might get a little depressed?
Science tells us that there is a measurable rise in mental health problems in the north of Finland during winter. But let's start at the beginning.
The top of Finland is located in the Arctic Circle which also encompasses the Arctic, parts of Russia, Norway, Sweden, Greenland and the far northern parts of Alaska and Canada. The Arctic Circle marks the southern extremity of the polar day (24-hour sunlit day, often referred to as the "midnight sun") and polar night (24-hour sunless night).
In Finnish Lapland, the sun sets in late November and generally does not rise until mid-January. This can last as long as 50 days in northern Finland.
North of the Arctic Circle, the sun is above the horizon for 24 continuous hours at least once per year and below the horizon for 24 continuous hours at least once per year. These events occur, in principle, exactly once per year, at the June and December solstices, respectively. But don't worry, even during winter it isn't completely dark for 24 hours; there will be a few hours of twilight.
Seasonal Affective Disorder, also known as SAD, is a mental health disorder exhibited by people who would normally have good mental health in other parts of the year but express depressive symptoms during winter.
Symptoms include lethargy, feeling depressed, disinterest in activities, lack of focus, irregular appetite and many others.
Some people have the complete opposite version where, in summer, they can't sleep, gain weight and suffer from anxiety.
Of course, both sets of circumstances pose challenges for the human body - physically and mentally. During winter, the body produces more melatonin (the neurotransmitter responsible for sleep patterns) due to the darkness which makes us tired and unmotivated. There is also a lack of serotonin production in the body.
Serotonin is the neurotransmitter responsible for mood and levels rise with sunlight. Essentially, SAD makes you feel like your get up and go, has got up and gone.
Realizing the effect the constant darkness might be having on your own body, you must be aware of its effect on the locals. In more remote places you may run across eccentric people, who are sometimes suspicious of outsiders. The long gloomy winter may lead to unpredictable behavior and alcohol abuse.
Levels of depression and related disorders are known to rise.
Also, one final note. Obviously, with little of the sun's heat to warm the earth, the weather can be especially extreme in northern Finland. Even outside winter, this can cause unexpected danger. Extreme cold kills lone trekkers almost every winter in the wilderness, and cold rain can also be a problem in summer. The key is to take appropriate precautions against both the emotional and physical extremes inherent to Finland's fascinating northern locations.
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