ISSN 1000-0526
CN 11-2282/P
CN 11-2282/P
A Diagnosis and Numerical Study of an Abrupt Recurved Typhoon Chanchu and Its Inner Core Structure Evolution
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Abstract:
The abrupt recurved severe typhoon Chanchu and its inner core structure evolution are documented by using FY2 TBB images, NCEP final analysis and the new generation mesoscale weather research and forecasting (WRF) model. Results show that the surrounding largescale steering flow and potential vorticity tendency play important roles in Chanchu movement. The rightward deflection of Chanchu is indicated by the surrounding largescale steering flow in advance. Chanchu is likely to move toward an area of maximum wavenumber1 potential vorticity tendency. The evolution of inner core asymmetric structure is closely related to the environmental vertical wind shear. The shearinduced tilt of the vortex has a dominant influence on the maximum upward motion in the southerly quadrant of Chanchu.
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