四川地区对流参数与雷电活动的相关关系

Correlation between Convection Parameters and Lightning Activity in Sichuan Area

本文利用2013年和2014年7~8月NCEP1°×1°再分析数据和四川省雷电监测网观测资料,统计分析了雷电活动发生前最佳近地表四层(1000h Pa、975h Pa、950h Pa和925h Pa)等压面抬升指数、对流有效位能、K指数和850h Pa假相当位温与雷电活动的相关关系。通过此次研究发现,对流参数在有雷电过程和无雷电过程中有明显差异,并且发现这四个对流参数和四川省雷电活动有较好的相关关系。通过此次研究得到了四川地区雷电活动对流参数预报指标,对已有雷电潜势预报有一定的参考价值。

Using the NCEP reanalysis data and observation data of lightning monitoring network in sichuan province from July to August,2013 to 2014 and calculating the value of the lifted index in four layers near surfers(1000hPa,975 hPa,950hPa,925hPa),convective available potential energy,the K index and 850hPa false equivalent temperature before the lightning and analyzing the correlation between them.Through this study,the values of convective parameters are significantly different in a day with or without lightning.The convective parameters have a good correlation with the lightning activity in sichuan province.Through this study,the prediction indexes of lightning activity in sichuan province have been obtained,which has certain reference for the prediction of lightning potential.