Assessment of hurricane vortex and boundary layer models for the development of wind and pressure profiles and fields

The main objective of this project is to evaluate existing models and methods for representing the vortex and wind and pressure structures of tropical cyclones (TCs). The initial assessment was performed by comparing TC vortex profiles with observed wind and pressure from atmospheric reanalysis data...

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Bibliographic Details
Main Author: Cordero-Mercado, Nelson Y.
Other Authors: Pagán-Trinidad, Ismael, Nadal-Caraballo, Norberto C., Zapata-López, Raul E., Arroyo-Caraballo, Jose R., College of Engineering, Department of Civil Engineering
Format: Report
Language:English
Published: 2021
Subjects:
Online Access:https://hdl.handle.net/20.500.11801/2852
Description
Summary:The main objective of this project is to evaluate existing models and methods for representing the vortex and wind and pressure structures of tropical cyclones (TCs). The initial assessment was performed by comparing TC vortex profiles with observed wind and pressure from atmospheric reanalysis data provided by the National Hurricane Center’s (NHC) hurricane database (HURDAT; Landsea & Franklin, 2013) and Colorado State University’s (CSU) extended best track (EBTRK; Demuth et al., 2006). Several models for representing the vortex structure of a TC have been developed in the past. Recreation of wind and pressure profiles for each of the studied models for the selected TCs in the North Atlantic basin was achieved using MATLAB® scripts. The studied vortex models were able to reasonably represent the wind profile data included in HURDAT and EBTRK for tropical storms and hurricanes. It was found that the Holland (1980), the Holland et al. (2010) and the Xie et al. (2012) wind models performed better for decreasing hurricane intensity, capturing the behavior of both the 1-min average maximum sustained wind speeds (Vmax) and the standard 34-, 50-, and 64-knots gale winds. Also, the Willoughby et al. (2006) wind model replicated the Vmax and gale winds despite using smaller values of Rmax. However, the best representations of hurricane categories 1 through 5 wind data were obtained with the models presented by Hu et al. (2012) and Gao et al. (2015) with almost negligible root-mean-square error. Tropical storms and weaker TC were best represented by the model presented by Holland et al. (2010). The results of this project are intended to aid in the development of regulation and guidance that incorporates the latest developments in coastal hazard analysis and quantification of related uncertainties. El objetivo principal de este proyecto es evaluar los modelos y métodos existentes para representar el vórtice y las estructuras de viento y presión de los ciclones tropicales (CTs). La evaluación inicial se realizó ...