An Analytic and Fast Model for the Complete Radial Structure of the Tropical Cyclone Wind Field

A tropical cyclone (TC) can generally be divided into three regions: the inner core with vigorous convections, the intermediate region with intermittent convections and the far outer region with less convective activity. The different physics in these three regions suggest corresponding different wind structure models. In this study, we combined the linear absolute angular momentum (AAM) slope model from Tao et al. (2023) (SL model), the outer wind model from Chavas et al. (2015) (C15 model) and a transition model of the modified Rankine vortex to create a new fast and analytic model for the complete radial structure of the tropical cyclone wind field. The SL model can realistically capture the inner-core AAM slope change during TC intensification stage and has small errors in the inner core while the C15 outer wind model can reproduce the characteristic wind structure of the broad outer region of tropical cyclones at large radii. We will evaluate the new wind model performance in reproducing the simulated complete wind profiles as well as the observed wind profiles.