Like torrential rain during the rainy season, "bomb-class"... "Unusual heavy snow on the explosive steam" [Y Record]

■ Host: Anchor Yoon Jae-hee, Anchor Cho Jin-hyuk
■ Video call: Anti-Sung YTN Disaster Advisory Committee

* The text below may differ from the actual broadcast content, so please check the broadcast for more accurate information. Please specify [YTN News UP] when quoting.

◇Anchor> It has been snowing and stopping all over the country since yesterday, so as you said, the vicious cycle of melting snow by spraying snow removal agent and then freezing it again is repeating. I think we need to pay a lot of attention to traffic safety, what do you think?

◆ Semi-sung> That's right. In this case, I think it's best to pay attention to traffic safety from myself. The most important thing is slow travel. It's the most important thing to go around slowly. Second, when we drive in snow or ice, we start at 2nd stage if it's manual, and when it's automatic, isn't there an auto hold? It's important to get this right. It's safest to follow the road the car in front of you next time you're on the road. Next time when it's downhill like this, don't use a hand brake and make sure to use an engine brake. In the case of uphill roads, you have to go up constantly, and if you take a break in the middle, you are very likely to be pushed back or have an accident like this. And I would like to specifically recommend that drivers prepare snow tires or winter equipment will be very helpful for safe driving.

◇Anchor> You said that you need to thoroughly prepare for snow damage. However, I have a lot of questions about the snow this time. It feels like it rains locally in summer. Can snow fall like that, too?

◆ Semi-sung> That's right. The principle is the same. In summer, rain clouds made by receiving a lot of water vapor from the West Sea land on the land, but when you look at the land, cold air comes down from the north and warm air is located at the bottom, doesn't atmospheric instability become strong? As a result, this rain cloud band from the West Sea becomes powerful as it lands on land, showing a pattern. As a result, this is a pattern of local heavy rain, which used to fall 140mm per hour in Gwanak-gu, Seoul.

That's the case this time, too. Even if a snow cloud made on a warm sea with very cold air from the sea comes in, it will also record a huge amount of snowfall. As I said earlier, in this case, there was actually a pressure trough from Gangwon-do toward Gyeonggi-do for two consecutive nights. The fact that the trough is created means that the cold air from the north comes down and there is warm air at the bottom. Then the atmosphere is very unstable here. As a result, the air that came in last night developed more strongly toward southern Gyeonggi-do, which entered Seoul or Gangwon-do, so this heavy snow actually falls.

In fact, because of the temperature difference between winter and summer, so the temperature is high in summer, so you can get quite a lot of precipitation, but isn't it winter now? Therefore, the absolute amount is small because the amount of water vapor that can be contained in the air is small, but if the air pressure pattern like yesterday is considered in summer, it can be considered that Baekam, which has come a lot now, or Geumjeong, has rained more than 400mm in places over 40cm.



Excerpted from the conversation: Lee Sun Digital News Team Editor

#YRecord