K指数反映出大气的层结稳定情况,但它不能明显表示出整层大气层结不稳定程度。由上式可知,A指数不仅包括各层之间的温度递减率,而且包括低层、中低层和中层的温湿度条件。A指数愈大,大气愈不稳定,也愈潮湿。-K index reflects the stable stratification of the atmosphere, but it can not be expressed clearly unstable atmospheric stratification of the entire layer. From the above equation, A index includes not only the temperature lapse rate between the layers, but also lower, the lower and middle temperature and humidity conditions. A larger index, the atmosphere more unstable, and the more humid.