最不稳定层的确定及应用

Ascertain and Application of the Significant Level

以清远探空站资料为基础,对2003-2004年清远及其附近地区强对流(雷雨大风、冰雹、龙卷风,下同)日最不稳定层位置及状态进行了统计,并把最不稳定层同几个规定层进行比较,总结出三种主要的产生强对流天气的T-LnP图型,为强对流天气的预报提供了极为有利的参考。

Based on the sounding data of Qingyuan station, the most instable significant level and their state in the strong convective days （including thunderstorm gale, hail and tornado days） are analyzed. Comparing with the standard level, three main kinds of T-lnp diagram indicating strong convective weather are concluded , which give the valuable reference to forecast such weather.