Characteristics of Clear Air Echoes and Application of Wind Field Information
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Abstract:
The characteristics of clearsky precipitation echoes are analyzed by using Doppler radar data from May to September, 2008 to 2013 to study the application potential of clearsky echoes to the warning of stratiform precipitation. The results show that the days with clearsky echoes account for about 87% from May to September in Linyi, with more than 90% of cases within the range of 100 km from the radar station. The reflectivity factors are mostly among 10 to 25 dBz and there is obvious diurnal variation. Clear sky echo velocity products can effectively reflect the wind of lowerlayers before stratiform precipitation and lower turbulence dissipation rate in a certain extent, and can also have indication of the precipitation process. These results are meaningful to reduce the missing alarm rates and earlier warning of convective weather.
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Supported by:Beijing E-Tiller Technology Development Co., Ltd.
Supported by:Beijing E-Tiller Technology Development Co., Ltd.