Typhoon approaching the Tokyo area 1.5 times more than in the last 40 years 7:02 on August 29
These are the results of research showing that the course of typhoons has undergone major changes in recent years. An analysis by the Japan Meteorological Agency's Meteorological Research Institute found that typhoons approaching Tokyo have increased 1.5 times in the last 40 years, making it easier to approach the Pacific side of Honshu. Experts say, "We may be affected by global warming and would like to proceed with the analysis."
Dr. Munehiko Yamaguchi, Senior Researcher at the Meteorological Research Institute, conducted a detailed analysis of how the course of typhoons approaching Japan changed during the 40 years from 1980 to last year.
As a result, it was found that typhoons approaching the Pacific side of Honshu and Shikoku increased during the first 20 years and the second 20 years.
Looking around the city, it is 1.5 times in Tokyo, 1.34 times in Nagoya and 1.23 times in Kochi.
This is because the Pacific highs, which control the course of typhoons, extend more north and west than before, and the route of typhoons went north.
In addition, the approaching typhoon is said to have a lower central pressure and intensify its influence, and also move at a slower speed, which has been affected by rising seawater temperatures and weakening of the westerly wind above.
The Japan Meteorological Agency has stated that, based on comparable data from 1951, "there is no tendency for the number of approaching typhoons to increase or decrease over the long term."
“It was a very important discovery that we could see a clear change in the last 40 years. It may be affected by global warming or seawater temperature that changes in a cycle of about 10 years,” said Yamaguchi. I want to analyze it in detail."