Numerical simulation about mixture of convective and stratiform clouds formed by convection merger
积云并合扩展层化型积层混合云的数值模拟分析

he mixture of convective and stratiform clouds is an important precipitation system and also a major object for weather modification studies. Because of the important effect of the mixture, we studied a process on 17 May 2005 by using a cloud-resolving mesoscale model of WRF. The mixture of this process is formed by convections merging, then many new convections will emerge near the cloud system. The new convections will merge into the mixture in moving process, and supply water and energy to the cloud system, so that the mixture system will maintain. Inside the mixture system, convection and stratiform clouds will act on each other. Convections will transport water content and energy to stratiform clouds around. So updraft velocity in convections will turn weaker, but that in stratiform cloud will maintain continuously and the whole area of updraft extends. Precipitation of convection will diminish, while that of stratiform clouds will maintain, so the mixture clouds can bring stronger precipitation in a large area.