Eleven tropical cyclones (TCs) affected Shanghai and crossed the same latitude as Shanghai from 2007 to 2018. According to similar tracks from best-track data, TCs that cause significant precipitation in Shanghai can be divided into three types: landfall TCs, nearshore northward TCs, and western TCs. Based on ERA5 reanalysis data, the dynamic synthesis method was used to synthesize TC circulation situations to compare thermal, dynamic, water vapor, and stability conditions within TC circulations during the period when they affected Shanghai. The conclusions are as follows. 1) When the three TC types are at the same latitude as Shanghai, they are all in the divergent field in the upper troposphere. For the landfall type, the subtropical high at 500 hPa is stronger and farther north than usual, and there is a high-pressure dam on the north side of the TCs. 2) The warm advection of the three TC types at 925 hPa is located in the northern quadrant of the TCs. The dynamic and water vapor conditions are good in the north-western quadrant of landfall and western TCs, and more favorable in the eastern quadrant of nearshore northward TCs. 3) The favorable effects of all three types on precipitation in Shanghai come from the boundary layer. Water vapor, upward motion, and instability conditions of landfall TCs are superior to the other two TC types. The best water vapor, dynamic, and convective instability conditions are at the northern boundary in Shanghai during landfall TCs, and the main sources of water vapor in Shanghai come from the eastern and northern boundaries. During nearshore northward TCs, the main contribution to precipitation is from the eastern boundary, while better dynamic and water vapor conditions come from the western and northern boundaries during western TCs. The above findings provide scientific and technical support for operational forecasting precipitation from TCs affecting mega-cities.

2007年至2018年，有11个热带气旋影响上海，并穿越与上海同一纬度。根据最佳轨迹数据的类似轨迹，导致上海显着降水的热带气旋可分为三种类型：登陆热带气旋、近岸北上热带气旋和西方TC。基于ERA5再分析资料，采用动力综合方法综合了TC环流情况，比较了影响上海期间TC环流的热力、动力、水汽和稳定情况。结论如下。 1)当3个TC类型与上海处于同一纬度时,均处于对流层上层的辐散场。登陆类型方面，500 hPa副热带高压较常年偏强、偏北，且热带气旋北侧有高压坝。 2) 925 hPa 3个热带气旋类型的暖平流均位于热带气旋北象限。登陆西北象限和西部热带气旋动力和水汽条件较好，近岸北向热带气旋东象限更为有利。 3) 三种类型对上海降水的有利影响均来自边界层。登陆热带气旋的水汽、上升运动和不稳定条件均优于其他两种热带气旋类型。热带气旋登陆期间上海北部边界水汽、动力和对流不稳定条件最好，上海主要水汽来源来自东部和北部边界。近岸北移TC期间，降水的主要贡献来自东部边界，而西部TC期间较好的动力和水汽条件来自西部和北部边界。上述研究结果为特大城市热带气旋降水业务预报提供了科学技术支撑。