Mesoscale Analysis on Torrential Rain over Beijing Area in July,1998

The rain cluster,the radar echo,surface wind field (streamline field) and pressure field during torrential rain over Beijing area in July,1998 were analysed.The results show that there is an obvious mesoscale characteristic for torrential rain process.The mesoscale easterly shear line,the convergence line of wind velocity and the mesoscale depression system all played important role during the torrential rain events.

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