Analysis of tracks characteristics of tropical cyclones affecting Shanghai from 1949 to 2023

In order to better analyze the tracks characteristics of tropical cyclones affecting the Shanghai area, the tropical cyclones data affecting Shanghai from 1949 to 2023 were studied. According to the characteristics of the track, the tropical cyclones tracks can be divided into four types: turning type, northwestward type, northward type, and abnormal type tracks. According to its landing situation, it can be further subdivided into 8 categories, and a preliminary exploration and analysis is carried out on the interannual and seasonal variation characteristics of different path types of tropical cyclones, as well as the influencing factors.Research findings indicate that both the tracks of tropical cyclones affecting Shanghai and those making landfall in Shanghai are dominated by turning type and abnormal type tracks. These are mainly influenced by factors such as the steering flow, the coriolis force, the Fujiwhara effect, topography and global warming. The frequency of the tropical cyclones obviously increases after 2000 and all these tropical cyclones are produced more in summer and autumn than that in spring and winter.