[앵커]
When the arctic cold wave was raging, the weather was clear, but when the cold was over, snow poured everywhere.
The temperature that rose to the video range is expected to drop once more tomorrow morning.
Reporter Kim Jin-doo analyzed the cause of the ever-changing weather that goes back and forth.
[기자]
Entering the 2000s, an unusually strong cold wave appeared.
The cause of the phenomenon called ‘Arctic cold wave’ is the warming.
As Arctic temperatures rose, the polar jets that contained the cold in the polar regions weakened, pushing the chill down to the mid-latitudes.
The cold wave that appeared from the beginning of December,
And the second cold wave that lasted a week was also caused by the arctic cold.
In particular, to the right of the expanding cold period, a ‘blocking’ phenomenon appears, in which the upper high pressure strongly acts as a barrier, and the cold wave continues for a long time.
The cold cannot escape and continues to build up, making the cold worse and longer.
[박정민 / 기상청 예보분석관 : (동쪽이) 완전히 고기압에 막혀 있고 우리나라 북쪽 고위도 지역에 찬 공기를 동반한 절리 저기압이 있기 때문에 계속해서 우리나라 쪽으로 찬 공기가 유입되고….]
When the cold wave subsides, snow clouds come inland and a lot of snow falls in Seoul.
Conversely, if the cold wave is severe, heavy snow falls on the west coast and Jeju Island, but the weather is clear in Seoul.
This is why the Arctic cold wave begins once more and the sky in Seoul clears up overnight.
The Korea Meteorological Administration believes that the arctic cold wave and blocking phenomenon will continue until this holiday.
The weather has been fluctuating since then, but it seems likely that December will be unusually colder than usual.
This is YTN Kim Jin-doo.
YTN Kim Jin-doo (jdkim@ytn.co.kr)
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