[Interview file] Winter when temperature was jagged due to climate change... This spring?

From the first day of March, as heavy snow poured in Yeongdong, I wondered if spring would be delayed.

Ipchun this year is the 3rd of last month, and a month has already passed, but now I can feel the energy of spring little by little.

The day before yesterday (5th), Uiryeong-gun, Gyeongnam, the highest temperature in the daytime exceeded 20℃, and Seoul also recorded 15.4℃ and was warm.

The Meteorological Administration considers the first of the days when the average temperature for 9 days is 5℃ or higher as the start of spring, so it is not yet official spring, but from the citizens' perception, it is already spring.

It may have faded from memory over time, but we have to think about the winter temperatures we have just passed.

There were many extreme temperatures and frequent heavy snowfall.

Spring has a low probability of extreme weather phenomena due to the nature of the season, but weather phenomena that are unfamiliar to us are becoming more frequent.

Was it because the winter of 2019-20 was exceptionally warm, or because of the winter-like weather that came after a year, this winter felt even more cold as the Han River was frozen.

Looking

actual record of the

, on January 8th, Seoul recorded -18.6℃, which was the coldest in 20 years.

The cold wave continued as the morning temperature fell below -10℃ for 5 consecutive days during this period.

On the 6th, over 10cm of snow was recorded in Seoul alone, and citizens had to suffer from double heavy snow and cold.

In January, the morning temperature on the 8th of the 31st dropped below -10℃.

The cold didn't last long.

The highest daytime temperature in Seoul on January 24 was 13.9℃, the warmest in 89 years, and the trend continued until the next day, the 25th.

The weather in early April appeared in January, when winter should be in full swing.

Only the temperature difference between the coldest and warmest days in January exceeds 30℃.

Since 1973, when weather observations were expanded nationwide, January this year was recorded as having the largest deviation in average temperature.

In February, the jagged weather continued, and the average temperature deviation was ranked third in history.

This winter (December 20th-February 21st), the overall fluctuation range was 4.9℃*, ranking second since 1976.

*Average temperature fluctuation range: The calculated value of how far it spreads around the average.

of repeated extreme weather phenomena is climate change.

The cold wave that came in early January was caused by high temperatures in the Arctic.

In June of last year, the sea ice in the Arctic Ocean melted the most, but even in winter, the area did not recover and remained at the lowest level.

Eventually, such anomalies in the play affected the mid-latitude region.

As the Arctic temperature increased, the jet stream that held the cold air of the pole weakened, and the cold air that should have been in the pole descended to the mid-latitude region as if ice cream melted and flowed down.

In the western part of Russia, near the Ural Mountains, a cold wave continued for several days as air congestion occurred and blocked.

In addition, as La Niña continued in the Pacific Ocean, rising air currents in the Western Pacific increased the continental high pressure that affected Korea in winter, as the downdrafts in China and Mongolia developed.

The high temperature in January, which came after 89 years, caused the northeast wind, as the mass of air that carried cold air fell to the northeast, and this northeast wind drove hot and dry winds in the western regions of Korea.

In addition to Korea, where a jagged winter has come, abnormal weather events have continued in many parts of the world.

In Beijing, China, the lowest temperature recorded -19.6℃, the lowest since 1969, and in Taiwan, a whopping 126 people died in early January due to a cold wave.

During the same period, heavy snowfall exceeding 150 cm in Japan fell, killing eight people and injuring more than 250 people.

In New Jersey, the U.S. heavy snowfall exceeding 90cm fell the most in 122 years, and in Oklahoma, the temperature dropped to -24℃, recording the lowest temperature since 1899.

According to data on global temperature surveyed by the US National Environmental Prediction Center since 1950, as the global temperature rises, the temperature fluctuation itself increases.

It is gradually exceeding the range of natural fluctuations regulated by nature.

It means that this winter's runaway may become more common in the future.

According to the forecast by the Meteorological Administration, the temperature between March and April will be higher than normal.

In particular, it is expected that the jagged weather pattern that continued until April will be repeated.

Due to the nature of the season, the daily temperature difference is also large, but it is expected that there will be temperature fluctuations, so the daily temperature difference is expected to be larger than the normal year.

Overall, the temperature will be high, and it is likely to be a spring weather that is temporarily affected by cold air.

The month of May was also expected to be warmer than normal, but it was predicted that there could be an abnormally high temperature, so there was a possibility that a heatwave warning would take effect.

The long-term forecasts such as one and three months provided by the Meteorological Agency are difficult to accurately forecast due to scientific limitations, so it seems that the spring forecast only needs to be referenced.