Why is the nation’s strongest cold wave until the 12th?
The role of’curtain’ that blocked cold air weakens… Equatorial low temperature sea level’La Niña’ also affects
Expert “The warming paradox… The cold wave goes away”… Heavy snowfall until the 10th in the West Coast-Jeju region
The wind is strong, and the temperature you experience decreases by 10 degrees
○ Cold waves, heavy snow, and cold winds come all at once
In a briefing on the 5th, the Meteorological Administration said, “The coldest than normal continues from the 6th to the 12th,” and “especially the 7th to 9th will be the coldest.” The minimum temperature in Seoul falls to -11 degrees on the 6th and -14 degrees on the 7th to -17 degrees on the 8th. Seoul’s minimum temperature has fallen below -17 degrees Celsius only six times since 2000. That’s an unusual cold.
The wind gets stronger from the dawn of the 7th. It is expected that strong winds of 10 to 16m per second will blow on the coast for two days until the 8th. It is as strong as a typhoon (from 17m per second). In most other parts of the country, strong winds of 7 to 13 meters per second were forecast. As the strong wind blows, the sensational temperature may feel almost 10 degrees lower than the actual temperature. Corona 19 outdoor screening clinics are operating nationwide, and care should be taken to prevent fires as well as thermal insulation measures.
It snows a lot. Starting from the west coast on the afternoon of the 6th, it expands across the country and falls until the morning of the 7th. Estimated snowfall is up to 20cm between the west coast and the mountains of Jeju, 1 to 5cm in the metropolitan area and inland of Gangwon, and 3 to 10cm in other areas. In the afternoon of the 7th, most areas of the country stop snowing, but the west coast of Jeolla and Jeju Island are covered until the 10th. This is because snow clouds continue to form due to the temperature difference between the relatively warm West Sea and the cold atmosphere over the Korean Peninsula. The Meteorological Administration predicted that by the 10th, snow will accumulate up to 50 cm in the mountains of Jeju and 30 cm in the west of Jeolla.
○ Arctic cold wave caused by warming
Above the North Pole, there is a layer of cold air around minus 50 degrees Celsius. A jet stream is rotating around it, preventing the cold air from escaping. Jet streams maintain their speed and act as a fence as the temperature difference between the North Pole and the mid-latitude increases. However, as the temperature difference between the mid-latitudes decreased due to the increase in Arctic temperature, the jet stream was loosened. The Korea Meteorological Administration explained that “the arctic cold air is coming down to mid-latitudes including the Korean peninsula as the loose jet stream is swaying.” The recent occurrence of the’La Niña’ phenomenon, where the sea level near the equator is lower than normal, also strengthened the power of the cold wave. Usually, when the La Niña phenomenon occurs, a large cyclone is located in the east of the Korean Peninsula. Cyclic pressure rotates in a counterclockwise direction and causes wind, but again, the cyclone in the northeast of the Korean Peninsula is playing a role in sending northern cold air to the Korean Peninsula.
An unusual cold wave in winter is one of the abnormal climates. According to the’Korea Climate Change Assessment Report 2020′ published by the Ministry of Environment and Meteorological Administration last year by analyzing expert research, the frequency of cold waves below -12 degrees Celsius is increasing recently. The number of days of cold wave in Korea increased from an annual average of 4.6 days from 2000 to 2009 to 5.3 days from 2010 to 2019. “The more arctic ice melts, the higher the likelihood of a long-term cold wave coming to the Korean Peninsula,” said Yeom Yeom-wook, a professor at Hanyang University’s Department of Marine Convergence Engineering.
Eunji Kang [email protected]Go to reporter page>Reporter
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