Effects of water vapor flux in the initial condition on precipitation simulation of a landfall typhoon
Based on the three-dimensional variation method,we investigated the effects of water vapor flux from land surface in the initial condition on the precipitation simulation during the landfall of typhoon"Lionrock",by assimilating dense in-situ ground data and X-band radar data.The results showed that the assimilating dense in-situ ground data could evidently improve the thermodynamic field in the boundary layer of the environment at the initial condition,improve precipitation simulation in the coastal region by weakening the thermal difference between land and ocean,and weaken water vapor flux in the boundary layer from northeast in land region to the landfalling typhoon.Assimilating X-band radar data could improve precipitation simulation by enhancing the water vapor flux in the boundary layer within the radar detection range in the initial condition.
landfall typhoonwater vapor fluxdense ground dataX band radar datadata assimilation
万方数据
维普
