The Recognition And Application Of Mid-altitude Radial Convergence Characteristics In Strong Convective Weather

Severe convective weather results in damaging weather in most cases. There aresome common kinds of disastrous weather, such as: thunderstorm and strong wind,hailstone, violent flood and waterspout. The presence of any kind of this severeweather will directly or indirectly cause great damage to people’s life and property. Ifthe thunderstorm winds can be accurately forecast, relevant departments will haveenough time to take precautions and the loss caused by the disaster wind can beminimized.This paper introduces a radial velocity characteristic in detail which is closelyrelated to the surface wind and the name is mid-altitude radial convergence (MARC)signature. The recognition and application of the MARC characteristics is studiedcarefully in the following parts. This work has some practical valueThe following is the main work of this paper:1. The radial velocity cross section can be realized under any direction of thecutting line.2. The direction of the best cutting can be determined in the Doppler radialvelocity diagram and then the cross section is constructed using the image processingtechnologies. The MARC signature has some image feature corresponding to theweather feature, so it can be detected in the cross section including its orientation andsize.3. The last part is statistical analysis of the sample. We find the change rules ofMARC signature and the relationship between the occurring time of MARC and thelanding time of damage wind.In conclusion, we did a lot data statistics, analysis about meteorological base dataand we provided the general law of the development of the MARC characteristic.