Fig. 4: Schematic diagram of the physical mechanisms for the acceleration of landfalling TCs. | Nature Geoscience

Fig. 4: Schematic diagram of the physical mechanisms for the acceleration of landfalling TCs.

From: Landfalling tropical cyclones accelerate due to land–sea thermal and roughness contrasts

Fig. 4: Schematic diagram of the physical mechanisms for the acceleration of landfalling TCs.

The white spiral and dashed circle show a simplified TC structure in the Northern Hemisphere and its vortex circulation. The black, red and blue vectors denote PVT at 1 km and the contributions from HA and DH, respectively. The blue and pink curved arrows mark the asymmetric wind flows driving HA, while the cloud indicates offshore convection enhancing DH. The offshore and onshore flows are shown. HA is divided into AASPV and SAAPV. The DH gradients are labelled DH-X, DH-Y and DH-Z.

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