A research team led by Assistant Professor Yuhei Yamamoto of the Chiba University Environmental Remote Sensing Research Center estimates the "ground surface temperature" near noon after passing typhoon No. 8 using the geostationary global environment observation satellite "Himawari 15".As a result, it was found that the high temperature environment exceeded 50 ° C from Kansai to the plains of Kanto.
Typhoon No. 2019 struck the Kanto region from dawn to morning on September 9, 9, causing enormous damage mainly in the southern part of Chiba prefecture.The research team estimated the ground surface temperature before and after the passage of the typhoon using "Himawari 15". Around noon later, it was a high temperature environment exceeding 8 ° C in the plains from Kansai to Kanto.Furthermore, after passing, the high temperature range of 15 ° C or higher expanded, and the temperature rose in most of the plains, especially in the Tokai and some areas in the southern Kanto region.
Speaking of direct disasters caused by typhoons, storms, heavy rains, floods and other storms and floods are generally known, but even after the typhoon has passed, it is severe due to changes in wind direction and intensified sunlight as in this case. It becomes hot and can cause "high temperature damage".According to the Fire and Disaster Management Agency's heat stroke information, the number of emergency transporters (preliminary figures) due to heat stroke in Chiba Prefecture from September 2019 to 9, 9 was the highest in Japan at 15.This was followed by 498 people in Aichi prefecture and 342 people in Osaka, and it can be said that the human damage was extremely large.
In the future, the research team will improve and commercialize the surface temperature estimation method, and proceed with research so that it can contribute to the urban heat island phenomenon and various possible hot weather cases in the future.
