A new paper has been published online in Atmospheric Research (IF=4.114 in 2019), i.e., W. Li, Z. Hu ,Z. Pei, S. Li, P.W. Chan. A discussion on influences of turbulent diffusivity and surface drag parameterizations using a linear model of the tropical cyclone boundary layer wind field. This study was one of the achievements of the numerical simulationand analysis on typhoon boundary layer, with the cooperation of Prof. Li's group, from Tsinghua Shenzhen International Graduate School, Pengcheng Laboratory in Shenzhen and Hong Kong Observatory. In order to investigate and predict dynamics and developments of the tropical cyclone boundary layer (TCBL), this present study proposes a linear height-resolving model, where the vertically varying turbulent diffusivity (K) and speed dependent surface drag coefficient (Cd) parameterizations are incorporated, and the proposed model is validated through comparisons with the estimates made based on the observational data gathered by dropsondes. Finally, it discusses the predictive effect on TCBL wind field from K and Cd. It is concluded that, whereas the prediction of the TCBL wind field is sensitive to the parameterization of K, Cd has limited effects on the prediction. Moreover, assuming K and Cd as constants could lead to erroneous estimates of the wind profile and strength of surface winds in the TCBL.
