Causes and Characteristics of a Pulse Storm in Chengdu
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Abstract:
To investigate the pulse storm occurred at 06:00 23 July 2014 in the urban area of Chengdu, the data of Doppler radar, wind profile, automatic weather station, conventional observation, and NCEP 1°×1° reanalysis are synthesized and analyzed. It is demonstrated that the clear sky solar radiation and lowlevel water transportation provide energy and moisture conditions for convection development in Chengdu thereabout. The warm advection and urban heat island of the surface layer enhanced the uplift movement at lower levels over the Chengdu urban area. In the weak vertical wind shear area, when gust front meeting with the mesoscale hot center and convergence line on the ground, the pulse storm occurred and developed. The features of the severe storm can be found from Doppler radar echoes, such as the overhanging echo, boundary weak echo range, midaltitude radial convergence, etc.
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Supported by:Beijing E-Tiller Technology Development Co., Ltd.
Supported by:Beijing E-Tiller Technology Development Co., Ltd.