中尺度对流复合体的热力学特征分析

Evolution on Thermodynamics Features of Meso-α-scale Convective Complexes

用合成分析方法探讨ＭＣＣ热力学结构的演变规律，结果表明：ＭＣＣ整个生命史里，对流层中下部为正涡度区，２００ｈＰａ以上为负涡度区；发展时刻辐合区突然抬升；ＭＣＣ前期的垂直上升速度最大中心高度低于后期的；ＭＣＣ的高低空的冷心。

The MCC's thermodynamics structure and evolution process is researched with composite analysis method. The major findings are as follows :the composite MCC is characterized by cyclonic vorticity confined within low-level and middle-level span MCC and anticyclonic vorticity located exclusively in the upper troposphere ; the composite MCC exhibits convergence expands and lifts to the middle troposphere during the MCC's growth and mature stages; upward motion maximum gradually rises ;the composite MCC exhibits the cool center in upper and low level , the warm center in the middle level during the early stage which is dim at the later period.