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From: TT
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Photograph: Stian Lysberg Solum / NTB / TT
High pressure in Russia is one of the reasons Sweden had a gray cap on itself in December. Stock Photography.
Karlstad, Visby, Norrköping, Storlien and Stockholm. The resorts have had zero hours of sunshine during December. The reversal of the meteorological phenomenon has formed a lid on Sweden.
It is cloudy, humid and not very cold. Until now, December has been characterized by gray weather, and at first it doesn’t seem easy.
It’s actually not unusual to have a sunless week in December, but Marie Staerk, a meteorologist at SMHI, still notes that there are very few hours of sunshine so far.
Russia time
Umeå is at the top of the happy places that have at least got a glimpse of the sun: so far, four hours of sunshine during December, until the eighth. Mainly in Sweden. But in Norrköping, Visby, Tarfala, Storlien, Karlstad, Nordkoster, and Stockholm, the sun has not been visible at all; in any case, the measurement stations have not been able to register more than 120 watts of sunlight per square meter, which is the measured value.
The reason is a high pressure on Russia that has formed a so-called inversion, a special meteorological situation in which hot air cannot rise in height as it usually does.
– Normally, the temperature drops with altitude when we reach the atmosphere. But when we have an inversion, the temperature first drops but then increases. On that cape you have a cap, says Marie Staerk.
“Don’t you dare trust”
The lid keeps moisture and mist out, and since the sun isn’t that high in the sky during December, it can’t burn through the clouds.
– High pressure in winter often means it is cloudy and gray, while in summer it becomes very sunny, says Marie Staerk.
Another well-known problem that investments can bring is smog in the largest cities. Exhaust gases and pollutants can remain at ground level.
A normal year, seen by studies from 1961-1990, Stockholm receives an average of 33 hours of sunshine in December, Gothenburg 40, Lund 32 and Umeå 21. There is a long way to go before those figures, says Marie Staerk. You won’t see any shine in the future either.
– Actually, it’s pretty bad with the chances of sunshine. I dare not trust the few gaps I have seen in the forecast.
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