Assessing Holland’s wind pressure profile parameters used for tropical cyclone wind field modelling: Fid-Bau Portal

Assessing Holland’s wind pressure profile parameters used for tropical cyclone wind field modelling

Sheng, C. / Hong, H.P.

Abstract The tropical cyclone (TC) wind field could be evaluated using Holland’s wind pressure profile defined by the radius to maximum wind speed R max and Holland B parameter. Empirical models for R max and B were developed using TC best track databases for two different basins and the “observed” surface wind field database (i.e., H*Wind dataset). Although the models developed for the North Atlantic basin (NAB) were applied to the western North Pacific basin (WNPB), its use was questioned. In the present study, we developed models for R max and B by applying the same analysis procedure using the TC best track databases for NAB and WNPB. We also developed models by using the H*Wind dataset with the boundary layer slab model and the gradient wind field based model. Our results indicated that the developed models for NAB are consistent with those for WNPB. These models are similar to those developed for the slab model using the H*Wind dataset, indicating that they can be used to assess the TC wind hazard for TCs from the NAB or the WNPB. Use of the developed models to assess TC wind hazard for a few sites located in the coastal region of mainland China is presented.

Highlights • Developed models for R max and B using TC best track databases from NA and WNP basins, as well as the H*Wind dataset. • Demonstrated the consistency of empirical equations for R max and B between NA and WNP TCs. • Showed the deviations of the R max and B models developed based on the H*Wind dataset by considering two wind field models. • Suggested the applicability of empirical models developed based on the best track dataset from JTWC to be used with the slab model. • Showed the sensitivity of wind hazards using different set of empirical equations for R max and B.