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Looking back on past cases, most of the typhoons that have caused great damage to our country so far come in the fall.

So, is the typhoon in autumn really causing more damage than in summer? In fact, our team analyzed and calculated typhoons over the past 20 years.



Reporter Lee Kyung-won delivers the contents.



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Over the past 20 years, where detailed damage aggregate data is available, 552 typhoons have occurred in the world and 77 typhoons have affected Korea.



During the same period, the number of casualties was calculated to be 491 people based on death and disappearance, and the total amount of damage was calculated to be 15.7 trillion won.



Specifically, the average casualties of typhoons in the summer of July and August were 4.8 people and that of typhoons in the fall of September and October of 12.2 people.



This time it's average damage.



Amounts have been converted to present values.



It was analyzed that the average summer typhoon was 166.4 billion won and the fall typhoon was 367 billion won, and the damage of the 'autumn typhoon' was 2.2 times greater.



However, typhoons such as Rusa in late August 2002 and Maemi in early September 2003 caused so much damage that they are close to statistical 'outliers'.



In order to understand the overall trend, these typhoons were excluded and reanalyzed.



As a result of the re-analysis, the average casualties were 0.5 and 6.3 people, respectively, and the average damage was 30.2 billion won and 115.9 billion won.



The data confirmed that the typhoon damage in the fall was greater.



Typhoons develop stronger as the sea surface temperature rises, but the sea surface heats slowly, so the temperature peaks in late August or early September, and naturally develops strongly around this time.



Moreover, as the sea surface temperature has risen due to the recent abnormal climate, the number of powerful typhoons in autumn has increased.



Nature also added a study earlier this year showing that typhoons in autumn are getting stronger in East Asia.



(Video editing: Won Yang, CG: Ahn Ji-hyun)