Characterizing surface pressure and wind fields of typhoons approaching Hong Kong
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
Author(s)
Related Research Unit(s)
Detail(s)
Original language | English |
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Article number | 105934 |
Journal / Publication | Journal of Wind Engineering and Industrial Aerodynamics |
Volume | 254 |
Online published | 25 Oct 2024 |
Publication status | Published - Nov 2024 |
Link(s)
Abstract
In this paper, 17 severe typhoons that have affected Hong Kong are simulated using an advanced numerical atmospheric simulation system - Weather Research and Forecasting model (WRF). The simulated surface pressure and wind fields of these typhoons are validated against a wide range of field observations. Then azimuth-dependent models for the radius of maximum winds and the Holland parameter are established statistically at the surface level. It is observed that the shape parameter of the Holland pressure model is smaller at the surface than that at the gradient level. And the Holland wind field model cannot well reproduce the simulated radial wind profiles due to the complexities of nonuniform surface conditions and typhoon dynamics. It is found that the modified Rankine model provides satisfactory estimates of typhoon wind speeds in Hong Kong. Additionally, wind field asymmetries of typhoons approaching Hong Kong are highly correlated with the typhoon track velocity, vertical wind shear and the angle between them. The proposed statistical models and identified characteristics of wind field asymmetries of typhoons will provide useful information for rapidly assessing typhoon wind hazards. © 2024 Elsevier Ltd.
Research Area(s)
- Pressure field, Statistical model, Tropical cyclone, Typhoon, Wind field, WRF
Citation Format(s)
Characterizing surface pressure and wind fields of typhoons approaching Hong Kong. / Hu, Feng; He, Junyi; Liu, Zhifei et al.
In: Journal of Wind Engineering and Industrial Aerodynamics, Vol. 254, 105934, 11.2024.
In: Journal of Wind Engineering and Industrial Aerodynamics, Vol. 254, 105934, 11.2024.
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review