Articles | Volume 19, issue 4
Research article
27 Feb 2019
Research article |  | 27 Feb 2019

Tornado-scale vortices in the tropical cyclone boundary layer: numerical simulation with the WRF–LES framework

Liguang Wu, Qingyuan Liu, and Yubin Li

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Weakening anomalies of East Asian Summer Precipitation Influenced by the Tibetan Plateau Warming Amplification
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Subject: Dynamics | Research Activity: Atmospheric Modelling and Data Analysis | Altitude Range: Troposphere | Science Focus: Physics (physical properties and processes)
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Cited articles

Aberson, S. D., Black, M., Montgomery, M. T., and Bell, M.: Hurricane Isabel (2003): New Insights Into the Physics of Intense Storms. Part II: Extreme Localized Wind, B. Am. Meteorol. Soc., 87, 1335–1348, 2006. 
Aberson, S. D., Zhang, J. A., and Ocasio, K. N.: An Extreme Event in the Eyewall of Hurricane Felix on 2 September 2007, Mon. Weather Rev., 145, 2083–2092, 2017. 
Braun, S. A. and Tao, W.-K.: Sensitivity of High-Resolution Simulations of Hurricane Bob (1991) to Planetary Boundary Layer Parameterizations, Mon. Weather Rev., 128, 3941–3961, 2000. 
Braun, S. A. and Wu, L.: A Numerical Study of Hurricane Erin (2001). Part II: Shear and the Organization of Eyewall Vertical Motion, Mon. Weather Rev., 135, 1179–1194, 2007. 
Bryan, G. H.: Effects of surface exchange coefficients and turbulence length scales on the intensity and structure of numerically simulated hurricanes. Mon. Weather Rev., 140, 1125–1143, 2012. 
Short summary
The tornado-scale vortex in the tropical cyclone boundary layer has been speculated in intense hurricanes. A numerical experiment is conducted using the Advanced Weather Research and Forecast model by incorporating the large-eddy simulation technique. The simulated tornado-scale vortex shows the similar features as revealed with the limited observational data. The presence of the tornado-scale vortex also leads to significant gradients in the near surface wind speed and wind gusts.
Final-revised paper