Seminars

Evaluating and Improving Hurricane Model Physics using Aircraft Observations in the Atmospheric Boundary Layer

Speaker: Dr. Jun Zhang
Affiliation:
U. Miami/NOAA  
Title:
Evaluating and Improving Hurricane Model Physics using Aircraft Observations in the Atmospheric Boundary Layer
Abstract: The atmospheric boundary layer is a critical region for hurricane development and intensification, because it regulates the energy distribution and spin-up dynamics of a hurricane.  However, the hurricane boundary layer is the least observed part of a storm until now. This talk presents in-situ aircraft observations of mean and turbulence structure of the hurricane boundary layer, including boundary-layer height scales, inflow strength, and turbulent fluxes.  These aircraft data have been used to evaluate and improve the model physics in the operational Hurricane Weather Research and Forecasting (HWRF) model, leading to substantial improvement in hurricane intensity forecast. This study emphasizes the important role of turbulent mixing in governing the inflow structure, distribution of deep convection and the hurricane intensity.
Host: Dennis Mayer, USF CMS

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