Why are typhoons more violent in autumn than in summer?

Compared with typhoons generated in summer, what are the remarkable characteristics of typhoons generated in autumn? Experts believe that the first is the moving path to the south. This is because after entering autumn, the subtropical high affecting the tropical cyclone path began to retreat eastward and move southward, and its position gradually moved southward. Secondly, the strength is relatively strong, resulting in serious losses. For example, when the super typhoon "Lee Tae" landed in Hualien in 2005, the instantaneous wind force actually exceeded 17. It brought a 9-level gale 1 1 to the coast of Fujian, and landed again in Putian, Fujian in the afternoon, bringing heavy rainfall to Jiangxi and Anhui, with huge losses. In addition, in terms of loss, autumn typhoon is more harmful to China's agricultural production, and the solar term from "autumnal equinox" to "light snow" is the maturity of late rice heading and flowering in southern China. If there is a typhoon at this time, heavy rain will damage the leaves of crops, and the seeds will fall off and rot, or even be completely destroyed, resulting in serious yield reduction or no harvest. In 2005, the strong typhoon "David" landed on the coast of Wanning, Hainan in the early morning of September 26th. At that time, it was the mature season of rice harvest and banana harvest, which caused great losses to agriculture in Hainan Province. In the context of global warming, extreme weather and climate events are becoming more and more intense, and the law of typhoon activity is more difficult to grasp, which will make the typhoon defense situation more complicated and severe, and we should not relax our vigilance because there are fewer typhoons in the early stage. Therefore, it is even more necessary to strengthen the defense against autumn typhoons in the future.