Abstract
AbstractA large eddy simulation (LES) of a well‐developed convective boundary layer (CBL) under no mean wind condition was performed with the Weather Research and Forecasting model in order to investigate the mechanisms for the intensification and maintenance of dust devils. By examining intense vortices from high temporal‐frequency outputs, it was found that most of the intense vortices are intensified through the merger of multiple vortices. Moreover, such a significantly intense vortex was maintained and more enhanced by additionally merging small‐scale vortices and tilting horizontal vortices at boundaries of convective cells. Copyright © 2010 Royal Meteorological Society
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